{"title":"Chondrites","description":"\u003cp\u003eChondrites are the most primitive meteorites in existence. Their parent asteroids never melted or differentiated, preserving the composition of the early solar system in nearly original form. Most contain chondrules, tiny spherical objects that crystallized from molten droplets in the solar nebula 4.56 billion years ago, among the oldest solid objects known. Unless specifically stated in the listing, specimens in this collection are Meteoritical Bulletin classified.\u003c\/p\u003e\n\n\u003ch2\u003eHow we verify chondrites are real\u003c\/h2\u003e\n\u003cp\u003eEvery specimen is tied to a Meteoritical Bulletin entry, the official global registry of classified meteorites maintained by the Meteoritical Society. Classification is performed by accredited laboratories that analyze chondrule textures, mineralogy, and oxygen isotope ratios. The Bulletin record is the definitive proof of authenticity. Read more: \u003ca href=\"\/pages\/meteoritical-bulletin-explained\"\u003eThe Meteoritical Bulletin Explained\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eMain chondrite groups\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOrdinary chondrites\u003c\/strong\u003e (H, L, and LL groups) are by far the most commonly recovered meteorites on Earth. They are distinguished by total iron content and the ratio of metallic to oxidized iron. H chondrites are high-iron, L chondrites are low-iron, and LL chondrites have both low total and low metallic iron.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCarbonaceous chondrites\u003c\/strong\u003e are the most primitive group, containing water-bearing minerals, organic compounds, and presolar grains older than the Sun itself. They include groups CI, CM, CV, CO, CK, CR, CH, and CB, named after type specimens. Read more: \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEnstatite chondrites\u003c\/strong\u003e (EH and EL groups) formed in the inner solar system under highly reducing conditions. Their oxygen isotope composition is remarkably similar to Earth's, suggesting they may represent material similar to Earth's original building blocks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRumuruti (R) chondrites\u003c\/strong\u003e and \u003cstrong\u003eKakangari (K) chondrites\u003c\/strong\u003e are smaller groups with distinct oxygen isotope signatures and mineralogy, indicating yet more parent bodies in the early asteroid belt.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a chondrule?\u003c\/strong\u003e Chondrules are spherical or near-spherical inclusions of silicate minerals, typically 0.1 to 2 millimeters across, that formed when molten droplets cooled rapidly in the solar nebula. They are the diagnostic feature of chondrites. Read more: \u003ca href=\"\/pages\/what-is-a-chondrite\"\u003eWhat Is a Chondrite?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre chondrites magnetic?\u003c\/strong\u003e Most ordinary chondrites contain enough metallic iron to attract a magnet, with H chondrites being the most strongly magnetic. Carbonaceous chondrites are generally less magnetic because they contain little free metal. Read more: \u003ca href=\"\/pages\/are-meteorites-magnetic\"\u003eAre Meteorites Magnetic?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I tell a chondrite from a terrestrial rock?\u003c\/strong\u003e Look for a dark fusion crust, visible chondrules on a cut surface, metallic flecks, and density higher than typical Earth rocks. Definitive identification requires laboratory analysis. Read more: \u003ca href=\"\/pages\/how-can-you-tell-if-a-meteorite-is-real\"\u003eHow Can You Tell if a Meteorite Is Real?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does L3 or H5 mean?\u003c\/strong\u003e The number is a petrologic type from 1 to 7, indicating how much thermal metamorphism the meteorite experienced on its parent body. Type 3 specimens are the least altered and show the sharpest chondrules; higher numbers indicate progressive recrystallization.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these specimens authenticated?\u003c\/strong\u003e Unless otherwise noted, every chondrite here has a Meteoritical Bulletin record and ships with a Treasure Coast Meteorite Co. certificate of authenticity.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e · \u003ca href=\"\/collections\/stony-meteorites\"\u003eStony Meteorites\u003c\/a\u003e · \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e · \u003ca href=\"\/pages\/types-of-meteorites\"\u003eTypes of Meteorites\u003c\/a\u003e · \u003ca href=\"\/pages\/are-meteorites-illegal-to-own\"\u003eAre Meteorites Illegal to Own?\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"nwa-17364-ll3-10-chondrite-meteorite-end-cut-13-34g","title":"NWA 17364 Ordinary Chondrite Meteorite End Cut, LL3.10, 13.34g, Fusion Crust","description":"\u003ch2\u003eType 3.10 preservation with textured fusion crust\u003c\/h2\u003e\n\u003cp\u003eThis 13.34g end cut preserves the full textural contrast between NWA 17364's rippled fusion crust exterior and its minimally altered chondritic interior. The fusion crust surface shows ablation flow patterns formed during atmospheric entry, while the cut face exposes discrete chondrules suspended in fine-grained matrix. The LL3.10 classification indicates minimal thermal metamorphism, preserving volatile-rich glass and primary igneous textures from the solar nebula.\u003c\/p\u003e\n\u003cp\u003eThe specimen's geometry as an end cut provides both display perspectives in a single piece: the melt-sculpted exterior formed during Earth atmospheric passage, and the interior record of accretionary processes that formed this material 4.567 billion years ago. The preserved crust occupies approximately 40% of the visible surface area, showing characteristic regmaglypts and flow lineations.\u003c\/p\u003e\n\u003ch2\u003eChondrule assemblage and matrix structure\u003c\/h2\u003e\n\u003cp\u003eThe cut face reveals well-defined chondrules ranging from submillimeter to several millimeters in diameter, characteristic of LL group ordinary chondrites. Individual chondrules retain sharp boundaries against the surrounding matrix, indicating limited solid-state recrystallization. Porphyritic olivine textures remain visible within larger chondrules, preserving igneous cooling structures from flash-heating events in the protoplanetary disk.\u003c\/p\u003e\n\u003cp\u003eThe fine-grained matrix between chondrules retains its primitive character, consistent with petrologic type 3.10. This low metamorphic grade preserves primary accretionary textures and volatile components that would be lost at higher thermal grades. Metal grains distributed throughout the matrix show minimal oxidation, typical of the low iron content that defines the LL (low metal, low total iron) classification group.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eNWA 17364 belongs to the LL ordinary chondrite group, representing material from an asteroid parent body that accreted in the early solar system. The 3.10 petrologic subtype classification places this meteorite among the least thermally altered chondrites known, preserving near-primary nebular conditions. Only seventeen meteorites have received the LL3.10 classification according to Meteoritical Bulletin records, making specimens of this subtype scientifically significant for understanding pre-metamorphic asteroid composition.\u003c\/p\u003e\n\u003cp\u003eOrdinary chondrites like NWA 17364 provide ground truth data for asteroid spectroscopy and thermal modeling. The preservation state of type 3.10 material constrains maximum temperatures experienced on the parent body surface or in shallow subsurface layers where thermal metamorphism remained minimal. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore how classification systems quantify metamorphic grade and what petrologic subtypes reveal about asteroid thermal history.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17364 is classified in the Meteoritical Bulletin as an LL3.10 ordinary chondrite found in Mali in 2022. Classification was performed by Anthony Irving and Akira Yamaguchi at University of Washington and NIPR. Full classification data: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84836\" target=\"_blank\"\u003eNWA 17364\u003c\/a\u003e. A certificate of authenticity from Treasure Coast Meteorite Co. is included with this specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 3.10 petrologic subtype indicate?\u003c\/strong\u003e The 3.10 designation represents minimal thermal metamorphism on a scale where 3.00 is completely unaltered and 3.9 approaches type 4. Type 3.10 chondrites retain primary glass, unequilibrated mineral compositions, and volatile elements lost at higher grades. Only seventeen LL chondrites worldwide have received this specific classification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 13.34g and includes a certificate of authenticity from Treasure Coast Meteorite Co. No display stand is included unless separately noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is fusion crust significant on chondrites?\u003c\/strong\u003e Fusion crust forms during atmospheric deceleration when surface material melts and ablates. On chondrites, preserved crust provides textural evidence of entry angle, velocity, and atmospheric heating duration. The rippled texture on this specimen indicates rotational tumbling during descent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between LL, L, and H chondrites?\u003c\/strong\u003e The letter designations refer to total iron content and metallic iron abundance. H chondrites are high in both, L chondrites are low, and LL chondrites like NWA 17364 are lowest in both total and metallic iron. These groups represent distinct parent asteroids with different formation redox conditions.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eLL3.10 chondrites represent the most primitive end of the petrologic type spectrum for low-iron ordinary chondrites. With only seventeen classified examples worldwide, specimens of this subtype offer access to minimally processed solar system material. This 13.34g end cut provides display-ready geometry, combining fusion crust preservation with visible chondrule structure in a single orientation.\u003c\/p\u003e\n\u003cp\u003eThe specimen's size and dual-surface presentation make it suitable for collection display while retaining the textural information that defines its scientific classification. Collectors focused on petrologic type series or building comprehensive ordinary chondrite reference sets will find few opportunities to acquire LL3.10 material. Browse additional primitive specimens in the \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection or explore metamorphic grade comparisons across \u003ca href=\"\/collections\/ordinary-chondrites\"\u003eOrdinary Chondrites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84836\" target=\"_blank\"\u003eNWA 17364\u003c\/a\u003e | Classification: LL3.10 Ordinary Chondrite | Find, Mali, 2022\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44724213612591,"sku":"NWA-17364-13.34G-INDIVIDUAL","price":600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17364-ll3-10-chondrite-end-cut-13-34g-full-view.heic?v=1779329639"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-22-16g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 22.16g, Dual Lithology Zones","description":"\u003ch2\u003eDual lithology specimen from one of Earth's rarest meteorite groups\u003c\/h2\u003e\n\u003cp\u003eThis 22.16g slice of Sinawan 005 preserves two distinct lithological zones in a single stone, light and dark regions recording different stages of parent body metamorphism. The boundary between these zones runs diagonally across the face, creating a visual record of the complex thermal and impact history that characterizes R5-6 chondrites. Partial fusion crust along one edge marks its atmospheric entry path over Libya in 2023.\u003c\/p\u003e\n\u003cp\u003eThe dual lithology structure suggests either brecciation from impact events on the parent body, or variable metamorphic grades within a single host rock. Both zones show the oxidized mineralogy typical of Rumuruti chondrites, high olivine content with elevated ferrous iron compared to ordinary chondrites. This specimen represents the complete slice, preserving the full transition between lithological domains.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe lighter lithological zone occupies roughly 60% of the face and displays a finer-grained matrix with scattered chondrule relicts, consistent with the type 6 metamorphic grade. The darker zone shows coarser crystallization and more pronounced grain boundaries, reflecting thermal processing at the type 5 boundary. Where the two zones meet, no sharp contact exists, the transition occurs over several millimeters, suggesting gradational metamorphic conditions rather than mechanical mixing.\u003c\/p\u003e\n\u003cp\u003eSmall rounded chondrules remain visible in both zones despite the moderate to high metamorphic grade. These range from 0.3 to 1.2 millimeters in diameter and appear as subtle textural variations against the surrounding matrix. The fusion crust displays the characteristic black glassy surface formed during atmospheric deceleration, with flow lines indicating the stone's orientation during flight.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eRumuruti chondrites constitute less than 0.5% of all classified meteorites, making them among the rarest chondrite groups in collections worldwide. Their parent body remains unidentified, though spectroscopic studies have attempted to link R-chondrites to several near-Earth asteroids without definitive confirmation. The group takes its name from the Rumuruti meteorite that fell in Kenya in 1934, establishing the classification for this distinct oxidized chondrite family.\u003c\/p\u003e\n\u003cp\u003eThe R5-6 designation indicates metamorphic conditions near the transition between type 5 (where chondrules are still clearly defined) and type 6 (where chondrule boundaries become obscured by recrystallization). Only three specimens of Sinawan 005 have been classified and distributed globally, with this stone representing one complete slice from the original recovered mass. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context for understanding chondrite classifications and metamorphic grades.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6). You can verify this classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does dual lithology mean in this context?\u003c\/strong\u003e Dual lithology refers to the presence of two distinct textural and compositional zones within a single meteorite. In Sinawan 005, these zones likely formed from different metamorphic conditions on the parent body or represent fragments that were mechanically mixed during an impact event and later lithified together.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes Rumuruti chondrites chemically distinct?\u003c\/strong\u003e R-chondrites contain olivine with significantly higher FeO content than ordinary chondrites, typically 38-40 mole percent fayalite. They also show higher bulk oxygen content and different oxygen isotope ratios, placing them on a separate formation path from H, L, and LL ordinary chondrites.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 22.16g slice and a certificate of authenticity. No display stand is provided.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow rare is a type R5-6 specimen?\u003c\/strong\u003e Extremely rare. Only three classified specimens of Sinawan 005 exist worldwide. Rumuruti chondrites as a group represent less than half of one percent of all meteorite falls and finds, and those showing dual lithologies are scarcer still.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eSinawan 005 offers access to one of meteorite science's most underrepresented groups. With only three known specimens in existence, this slice provides a tangible connection to a parent body that remains astronomically unidentified. The dual lithology structure adds visual and scientific interest beyond what typical Rumuruti specimens display, making this piece notable even among R-chondrites.\u003c\/p\u003e\n\u003cp\u003eThe 22.16g mass provides sufficient size for display while representing a complete cross-section through both lithological domains. Collectors focused on rarity metrics or completing representative samples across all chondrite groups will find few opportunities to acquire classified R5-6 material. This specimen bridges the gap between type 5 and type 6 metamorphic grades, documenting thermal evolution on a parent body that delivered less than 200 classified specimens to Earth across all recorded history. Browse additional rare chondrite classifications in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732955394095,"sku":"SINAWAN-005-22.16G-INDIVIDUAL","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6642.heic?v=1764797861"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-23-89g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 23.89g, Dual Lithology Zones","description":"\u003ch2\u003eDual lithology slice from one of three known specimens\u003c\/h2\u003e\n\u003cp\u003eThis full slice of Sinawan 005 displays two distinct lithological zones separated by a visible boundary, a light-toned region and a darker domain that reflect heterogeneous metamorphic conditions within the parent asteroid. The contrast between these zones is stark under magnification, offering direct evidence of variable thermal processing or mechanical mixing during parent body history. At 23.89g, this slice captures both lithologies in a single coherent section, preserving the boundary that records localized shock or impact-driven metamorphic gradients.\u003c\/p\u003e\n\u003cp\u003eSinawan 005 is one of only three classified specimens of this R5-6 type, a transitional metamorphic grade that bridges equilibrated (type 5) and highly metamorphosed (type 6) R chondrites. The dual lithology character visible in this slice suggests localized impact mixing or incomplete thermal equilibration, features that make this specimen scientifically significant beyond its rarity. The surface shows partial fusion crust along one edge, confirming atmospheric entry heating.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe lighter lithology zone exhibits coarser grain structure consistent with type 6 metamorphic grade, where chondrules are partially obliterated and olivine crystals have grown to larger sizes. The darker zone retains finer-grained texture characteristic of type 5 metamorphism, where chondrule outlines remain faintly visible and the matrix has not fully recrystallized. The boundary between these zones is not gradational but sharp, indicating that the two domains were juxtaposed through impact processes rather than gradual thermal transition.\u003c\/p\u003e\n\u003cp\u003eOlivine crystals in both zones display the distinctive high-iron composition that defines Rumuruti chondrites, giving the meteorite its characteristic reddish-brown oxidation state. Small metal grains are sparse, consistent with the highly oxidized formation environment of the Rumuruti parent body. Fusion crust along one edge is thin and dark, with subtle flow lines that record the meteorite's orientation during atmospheric passage.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eRumuruti chondrites represent less than 0.5% of all classified meteorites, making them among the rarest chondrite groups. They formed in an oxygen-rich region of the early solar system, distinct from the more common ordinary chondrites, and likely originated from a single parent asteroid that remains unidentified. The R5-6 transitional grade is particularly scarce, most Rumuruti meteorites fall cleanly into a single metamorphic type, making specimens that span two grades exceptionally valuable for understanding parent body thermal evolution.\u003c\/p\u003e\n\u003cp\u003eThe dual lithology character of Sinawan 005 suggests that the parent asteroid experienced localized impact heating or fragmentation that brought together materials from different thermal zones. This type of brecciation provides a snapshot of internal asteroid structure that would otherwise remain inaccessible. Researchers studying Rumuruti meteorites use specimens like this to model impact processes on small differentiated bodies and to understand how metamorphic gradients develop in asteroid interiors. For collectors and students seeking to understand meteorite petrology, this slice offers a clear visual demonstration of how impact and thermal processes interact on airless bodies. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6), found in Libya in 2023. You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does dual lithology mean in this context?\u003c\/strong\u003e Dual lithology refers to the presence of two distinct rock types within a single meteorite slice. In Sinawan 005, one zone shows type 5 metamorphism (partially recrystallized chondrules) while the adjacent zone exhibits type 6 metamorphism (nearly obliterated chondrules and coarser grain growth). The sharp boundary between them indicates they were brought together by impact rather than forming in place.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 23.89g full slice shown in the photographs and a signed certificate of authenticity. No display stand is included unless separately listed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are Rumuruti chondrites so rare?\u003c\/strong\u003e Rumuruti chondrites come from a single, unidentified parent asteroid that formed in a highly oxidizing region of the early solar system. Because they originate from one source rather than multiple parent bodies like ordinary chondrites, and because that source produces relatively few meteorite falls, Rumuruti specimens remain exceptionally scarce in collections worldwide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should this slice be displayed?\u003c\/strong\u003e The dual lithology boundary is the defining visual feature. Display the slice face-up under good lighting to emphasize the contrast between the light and dark zones. Side lighting will highlight the texture differences between the two metamorphic grades.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eSinawan 005 is one of only three known specimens of this R5-6 transitional type, placing it among the rarest chondrite classifications available to private collectors. The dual lithology character adds scientific interest beyond simple rarity, this is not just a scarce meteorite type, but a specimen that actively demonstrates metamorphic processes and impact mixing within an asteroid. For collectors building representative type collections, Rumuruti chondrites are essential and difficult to acquire. A transitional grade with visible lithological variation is an opportunity to own a specimen that would be equally at home in a research collection.\u003c\/p\u003e\n\u003cp\u003eAt 23.89g, this slice is large enough to show both lithologies clearly while remaining accessible for private acquisition. The boundary between zones is sharp and well-preserved, making the dual character immediately apparent without magnification. This is a specimen that tells a story about asteroid interiors and impact processes, not just a catalog entry. Collectors focused on chondrite diversity will find few opportunities to acquire Rumuruti material at this size and visual clarity. \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732975349807,"sku":"SINAWAN-005-23.89G-INDIVIDUAL","price":330.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6645.heic?v=1764799409"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-20-29g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 20.29g, Dual Lithology Zones","description":"\u003ch2\u003eDual lithology zones define this complete slice\u003c\/h2\u003e\u003cp\u003eThis complete slice of Sinawan 005 presents a stark visual contrast between light and dark lithology zones that divide the specimen face. The boundary between these zones cuts diagonally across the slice, creating a natural division that records two distinct formation episodes or thermal histories within the same meteorite. The lighter zone shows typical R-chondrite mineralogy with oxidized silicates, while the darker zone exhibits a different matrix composition and grain size distribution. This dual character appears throughout the 20.29g slice, making the structural variation immediately apparent.\u003c\/p\u003e\u003cp\u003eThe R5-6 classification indicates an intermediate metamorphic grade between type 5 and type 6, placing this specimen at a thermal threshold where chondrules remain visible but matrix recrystallization has begun. In Rumuruti chondrites, this grade produces especially clear textural boundaries when multiple lithologies are present. The slice preserves both zones completely, offering a cross-sectional view of the internal structure that formed in the parent body regolith.\u003c\/p\u003e\u003ch2\u003eChondrule preservation and matrix structure\u003c\/h2\u003e\u003cp\u003eThe lighter lithology zone retains well-defined chondrule outlines with diameters ranging from submillimeter to approximately 1.5mm. Matrix material between chondrules shows the fine-grained, oxidized character typical of Rumuruti meteorites, with reddish-brown coloration from iron oxide phases. Metal grains appear sparse and small, consistent with the highly oxidized nature of R-chondrites where metallic iron is largely absent compared to ordinary chondrites.\u003c\/p\u003e\u003cp\u003eThe darker zone displays tighter packing of mineral grains with less distinct chondrule boundaries, suggesting more advanced thermal metamorphism or a different original lithology. The textural contrast between zones provides direct evidence of regolith mixing on the Rumuruti parent body, where materials from different depths or locations were combined through impact processes before lithification. Surface weathering remains minimal, with fresh internal structure visible across both lithologies.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eRumuruti chondrites represent material from a parent body distinct from those that produced ordinary chondrites, carbonaceous chondrites, or enstatite chondrites. The R-chondrite group comprises less than 0.5% of all classified meteorites, making any specimen scientifically valuable. The oxidized mineralogy, low metal content, and oxygen isotope composition of Rumurutiites point to formation under conditions more oxidizing than those experienced by ordinary chondrites, likely in the outer asteroid belt.\u003c\/p\u003e\u003cp\u003eSinawan 005 holds additional significance as one of only three specimens classified at the R5-6 grade. This intermediate metamorphic state preserves information about thermal processing on the parent body while maintaining enough primary texture to identify original components. The dual lithology structure indicates regolith breccia formation, where surface materials were mixed by impacts and subsequently lithified. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e for broader context on chondrite classification and parent body processes.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6), confirmed through thin section analysis and chemical characterization. The \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin entry\u003c\/a\u003e documents the classification. This specimen includes a certificate of authenticity with the documented weight and classification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does R5-6 mean?\u003c\/strong\u003e The R designates Rumuruti-type chondrite, a rare group with oxidized mineralogy. The 5-6 indicates metamorphic grade between type 5 (chondrules distinct with recrystallized matrix) and type 6 (chondrules less distinct, extensive matrix recrystallization). This intermediate grade captures a specific thermal state on the parent body.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 20.29g complete slice and a certificate of authenticity documenting the classification and weight. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat causes the dual lithology structure?\u003c\/strong\u003e The light and dark zones formed from separate materials that were mixed in the parent body regolith through impact processes. Different thermal histories or original compositions created the textural and color contrast. The zones were combined before the final lithification event that created the meteorite we see today.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow rare is this specific specimen?\u003c\/strong\u003e Sinawan 005 is one of three classified specimens at the R5-6 grade. Within the already rare Rumuruti group (less than 0.5% of all meteorites), specimens showing this clear dual lithology structure and complete preservation are exceptionally limited in availability.\u003c\/p\u003e\u003ch2\u003eRarity drives collector interest in Rumuruti specimens\u003c\/h2\u003e\u003cp\u003eCollectors pursue Rumuruti chondrites because of their scarcity in the meteorite population and their distinct formation environment. With fewer than 100 classified R-chondrites worldwide, any specimen represents a fraction of available material. The R5-6 metamorphic grade exists at the boundary where primary textures meet thermal alteration, making these specimens valuable for understanding parent body thermal evolution.\u003c\/p\u003e\u003cp\u003eThis 20.29g complete slice offers display-ready dimensions with scientifically significant dual lithology structure visible across the entire face. The size provides enough mass to appreciate the textural contrast while remaining accessible for private collections. Complete slices with preserved boundaries between lithology zones are less common than fragments, as cutting typically separates zones rather than presenting them together. Explore additional rare chondrite specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732976922671,"sku":"SINAWAN-005-20.29G-INDIVIDUAL","price":330.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6648.heic?v=1764799606"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-17-32g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 17.32g, Dual Lithology Zoning","description":"\u003ch2\u003eDual lithology zones preserved in a type 5-6 R-chondrite\u003c\/h2\u003e\n\u003cp\u003eThis 17.32g slice of Sinawan 005 shows two distinct lithology zones across its cut surface, a light-toned region and a darker zone with contrasting mineral composition and thermal history. The boundary between these zones represents heterogeneous metamorphic conditions within the parent body, where discrete regions experienced different peak temperatures during thermal processing. Rumuruti chondrites record metamorphic grades from unequilibrated type 3 through highly equilibrated type 6, and specimens straddling this R5-6 boundary preserve evidence of transitional heating events. The slice displays well-defined chondrules embedded in both lithologies, with the darker zone showing more advanced recrystallization of the matrix.\u003c\/p\u003e\n\u003cp\u003eOnly three specimens of Sinawan 005 have been classified and entered into the Meteoritical Bulletin following the 2023 recovery in Libya. This slice represents a significant fraction of the known material available to private collectors. The dual lithology feature makes this specimen scientifically noteworthy, most R-chondrites show relatively uniform metamorphic grade across individual stones, while this piece captures a structural discontinuity that likely formed during complex parent body evolution.\u003c\/p\u003e\n\u003ch2\u003eChondrule preservation and matrix structure\u003c\/h2\u003e\n\u003cp\u003eChondrules remain visible throughout both lithology zones, with sizes ranging from submillimeter to approximately 1mm in diameter. The lighter zone preserves more distinct chondrule boundaries, indicating lower metamorphic grade consistent with R5 classification. The darker zone shows partial to complete recrystallization of chondrule mesostasis into granular texture, characteristic of the R6 grade. Olivine grains display a distinctive rusty-red oxidation state typical of Rumuruti chondrites, caused by high oxidation conditions during formation. Metal content appears minimal, as expected for R-chondrites, which contain less than 1% metallic iron-nickel by volume.\u003c\/p\u003e\n\u003cp\u003eThe matrix surrounding the chondrules consists of fine-grained olivine and pyroxene crystals, with the darker lithology showing coarser grain boundaries where recrystallization progressed further. Minor sulfide inclusions appear as small bright specks dispersed through both zones. No fusion crust remains on this interior slice.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eRumuruti chondrites represent fewer than 0.5% of all classified meteorites, making them among the rarest major chondrite groups. Unlike ordinary chondrites that formed in relatively reducing environments, R-chondrites crystallized under highly oxidizing conditions, producing their characteristic red-brown olivine and near-absence of metallic iron. The parent body remains unidentified, though spectroscopic studies suggest a main-belt asteroid with surface composition distinct from known ordinary, carbonaceous, or enstatite chondrite parent bodies. Thermal modeling indicates R-chondrite parent bodies underwent significant metamorphic heating, likely from radiogenic decay of short-lived isotopes like aluminum-26 in the early solar system.\u003c\/p\u003e\n\u003cp\u003eType 5-6 specimens like Sinawan 005 reached peak metamorphic temperatures between 750°C and 950°C, hot enough to homogenize olivine compositions and recrystallize chondrule mesostasis while preserving original chondrule outlines. The dual lithology in this specimen suggests either a breccia formed from fragments with different thermal histories, or a metamorphic gradient where the stone resided at a thermal boundary within its parent body. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional background on chondrite classification and metamorphic processes.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Sinawan 005 is classified as Rumuruti (R5-6) in the Meteoritical Bulletin following analysis of material recovered in 2023. The Meteoritical Bulletin entry can be accessed here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does R5-6 classification mean?\u003c\/strong\u003e The R designation identifies this as a Rumuruti chondrite, a rare group characterized by high oxidation state and distinctive red-brown olivine. The 5-6 petrologic type indicates metamorphic heating to temperatures where olivine compositions homogenized and matrix recrystallized, but not hot enough to completely destroy chondrule textures. The dual number reflects transitional features between type 5 and type 6 metamorphic grades within this single stone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes this specimen scientifically significant?\u003c\/strong\u003e Only three specimens of Sinawan 005 have been classified worldwide as of 2023. The dual lithology zones preserved in this slice represent heterogeneous metamorphic conditions rarely seen in individual R-chondrite stones. This specimen has been referenced in published scientific literature examining its unique structural features and formation history.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 17.32g slice and a certificate of authenticity. No display stand is included with this listing.\u003c\/p\u003e\n\u003ch2\u003eCollector significance for rare R-chondrites\u003c\/h2\u003e\n\u003cp\u003eSinawan 005 offers collectors access to one of the rarest chondrite groups with an exceptionally limited total known weight distributed across only three classified specimens. The dual lithology visible in this slice provides a display feature that distinguishes it from typical single-zone R-chondrite slices. At 17.32g, this specimen represents substantial size for a material type where most available pieces measure under 10g due to extreme scarcity. The transitional R5-6 classification adds scientific interest, as most R-chondrites fall cleanly into a single metamorphic type rather than straddling grade boundaries.\u003c\/p\u003e\n\u003cp\u003eR-chondrites remain significantly underrepresented in most meteorite collections compared to ordinary chondrites, making any classified specimen a priority acquisition for collectors building comprehensive type collections. This piece combines scientific importance, visual interest from the lithology contrast, and rarity as one of three known examples of its specific classification. Collectors focused on \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e will find few opportunities to acquire R-type material with this level of documentation and structural complexity.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732990521391,"sku":"SINAWAN-005-17.32G-INDIVIDUAL","price":240.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6651.heic?v=1764800489"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-24-45g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 24.45g, Dual Lithology Zones","description":"\u003ch2\u003eTwo lithologies in a single slice\u003c\/h2\u003e\u003cp\u003eThis Sinawan 005 specimen preserves two distinct lithologies within one slice. A light-toned zone and a darker zone meet at a sharp contact, representing different thermal or shock histories within the same parent body. The boundary between these regions cuts cleanly across the face, making the structural division immediately visible. At 24.45g, this slice captures the full width of both zones in a single cross-section. Fusion crust fragments remain along portions of the edge, marking the original exterior surface of the meteorite.\u003c\/p\u003e\u003cp\u003eSinawan 005 is classified as R5-6, placing it at the thermal transition between type 5 and type 6 petrologic grades. This dual grading reflects heterogeneous heating within the Rumuruti parent body. The light zone shows characteristics of higher metamorphic grade, while the darker zone retains features of lower grade material. Both zones coexist because the parent body experienced uneven internal heating, possibly from impact or radioactive decay in localized regions.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe contact zone between the two lithologies is the defining structural feature. This boundary is not gradational but abrupt, suggesting that the two regions formed under different conditions and were later juxtaposed, likely through impact brecciation. Chondrule outlines are visible in both zones, though better preserved in the darker material. The lighter zone displays more recrystallized matrix, consistent with higher metamorphic alteration. Small metal grains are distributed throughout both lithologies, appearing as bright flecks against the silicate background.\u003c\/p\u003e\u003cp\u003eThe slice surface shows natural texture without artificial polish. This preserves the native contrast between the two zones and allows direct observation of the mineralogical differences. Fusion crust, where present, is thin and dark, typical of Rumuruti chondrites, which produce less pronounced crusts than ordinary chondrites due to their oxidized composition.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eRumuruti chondrites represent approximately 0.5% of all classified meteorites, making them one of the rarest major chondrite groups. They are named after the Rumuruti meteorite, which fell in Kenya in 1934. R chondrites are oxygen-isotope distinct from ordinary, carbonaceous, and enstatite chondrites, indicating they originate from a separate parent body. That body remains unidentified, though it likely resides in the inner asteroid belt based on orbital dynamics.\u003c\/p\u003e\u003cp\u003eThe R5-6 classification indicates that this meteorite experienced peak metamorphic temperatures between approximately 700°C and 950°C. This heating caused recrystallization of matrix minerals and partial equilibration of olivine and pyroxene compositions. The dual lithology structure suggests that different regions of the parent body reached different peak temperatures or cooled at different rates. Impact mixing later brought these zones together into a single rock. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how petrologic types reflect thermal history.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6), found in Libya in 2023. The full classification details are available through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its provenance and classification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does dual lithology mean in this context?\u003c\/strong\u003e Dual lithology refers to two distinct rock types present in the same specimen. In this slice, one zone shows higher metamorphic grade (lighter color, more recrystallization) while the other shows lower grade (darker, better-preserved chondrules). The sharp boundary between them indicates they were brought together by impact processes on the parent body, not by gradual transition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 24.45g and includes a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the R5-6 designation significant?\u003c\/strong\u003e The hyphenated grade (R5-6) indicates that this meteorite contains characteristics of both petrologic type 5 and type 6. This intermediate classification is less common than single-type assignments and reflects thermal heterogeneity within the parent body. It places the specimen at a key transition point in metamorphic evolution.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow rare is Sinawan 005 specifically?\u003c\/strong\u003e Only three specimens of Sinawan 005 have been classified and documented. This makes it exceptionally scarce even within the already-rare Rumuruti group. The meteorite has been the subject of published scientific research due to its unusual dual lithology structure.\u003c\/p\u003e\u003ch2\u003eScientific importance and collector positioning\u003c\/h2\u003e\u003cp\u003eSinawan 005 is one of three known specimens at this specific classification, making it scientifically significant beyond the inherent rarity of R chondrites. The dual lithology structure has been documented in peer-reviewed literature, confirming that this meteorite preserves direct evidence of thermal and impact processes on the Rumuruti parent body. Collectors seeking scientifically noteworthy specimens will find few opportunities more compelling than a meteorite with published research and documented scarcity at this level.\u003c\/p\u003e\u003cp\u003eThe slice format allows full observation of both lithologies in their natural contact relationship. This is not a polished display piece but a research-grade cross-section that reveals internal structure. The 24.45g size is substantial enough to show both zones completely while remaining accessible for private collections. \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e of this rarity and documented significance rarely appear on the collector market. This is one of three chances to own this specific find.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732992258095,"sku":"SINAWAN-005-24.45G-INDIVIDUAL","price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6654.heic?v=1764800640"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-14-49g","title":"Sinawan 005 Rumuruti Meteorite Individual, R5-6, 14.49g, Dual Lithology R-Chondrite","description":"\u003ch2\u003eDual lithology R-chondrite from Libya\u003c\/h2\u003e\n\u003cp\u003eThis 14.49g Sinawan 005 individual preserves two distinct lithological zones across its natural surface, a light-toned region and a contrasting dark zone that meet in a sharp boundary. The specimen retains partial fusion crust on one face, evidence of atmospheric entry. Rumuruti chondrites represent less than 0.5% of all classified meteorites, making this R5-6 specimen from a recent 2023 Libyan find scientifically significant.\u003c\/p\u003e\n\u003cp\u003eThe dual lithology structure visible in this piece reflects differing thermal or shock histories within the parent body before ejection. R-chondrites are named after the Rumuruti fall in Kenya and characterized by oxidized, fine-grained matrices with distinctive olivine compositions. Only three specimens of Sinawan 005 are known to exist.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe light zone shows tightly packed chondrules embedded in a fine matrix, typical of the R5-6 petrologic type. The darker region displays a more opaque matrix with less visible chondrule definition, suggesting localized shock darkening or impact melt influence. The contact between these zones runs diagonally across the specimen face, creating a natural contrast that highlights the meteorite's complex formation environment.\u003c\/p\u003e\n\u003cp\u003ePartial fusion crust covers approximately 30% of the surface, preserving the black glassy rind formed during atmospheric passage. The exposed interior reveals the characteristic rust-brown coloration of oxidized R-chondrite material. No regmaglypts are visible on this small individual, but the fusion crust shows smooth flow textures consistent with rapid melting and cooling.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eRumuruti chondrites formed in an oxygen-rich region of the early solar system distinct from ordinary and carbonaceous chondrite parent bodies. The R-chondrite parent body remains unidentified, though spectroscopic studies suggest possible links to certain asteroids in the outer main belt. The R5-6 classification indicates this specimen experienced moderate thermal metamorphism, reaching temperatures sufficient to recrystallize silicates while preserving recognizable chondrules.\u003c\/p\u003e\n\u003cp\u003eThe dual lithology in this specimen records either impact brecciation or distinct cooling zones within the parent asteroid. Such features provide critical data about impact processing and thermal gradients in small planetary bodies. Researchers study R-chondrites to understand oxygen isotope distributions and oxidation states across different nebular regions. For broader context on meteorite classification systems, see our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e guide.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Sinawan 005 is classified as Rumuruti (R5-6) in the Meteoritical Bulletin. You can verify this classification through the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\"\u003eMetBull database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its provenance and classification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does dual lithology mean?\u003c\/strong\u003e Dual lithology indicates two distinct rock types or structural zones present in a single meteorite specimen. In this Sinawan 005 piece, the light and dark zones represent different mineral assemblages or shock states that formed in the parent body before the meteorite reached Earth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 14.49g Sinawan 005 individual and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are only three specimens of Sinawan 005 known?\u003c\/strong\u003e Sinawan 005 represents an extremely limited recovery from the 2023 find in Libya. The total known weight is minimal, and only three individual stones were classified and distributed. This scarcity makes each specimen scientifically valuable and highly collectible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I display this meteorite without a case?\u003c\/strong\u003e R-chondrites are stable at room temperature and do not require sealed storage like hygroscopic carbonaceous chondrites. The fusion crust and oxidized matrix are durable. Standard display conditions away from prolonged moisture exposure are sufficient.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eSinawan 005 joins fewer than 100 classified Rumuruti chondrites worldwide. The R-group represents the rarest chondrite family available to private collectors. This 14.49g individual offers dual lithology structure visible without magnification, combining scientific interest with display appeal. Only three specimens exist, making acquisition opportunities extremely limited.\u003c\/p\u003e\n\u003cp\u003eThe specimen's natural surface and partial fusion crust provide authentication markers that distinguish it from processed slices. For collectors building reference sets of rare chondrite types, this Sinawan 005 individual fills a critical gap. Explore other rare chondrite specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732994388015,"sku":"SINAWAN-005-14.49G-INDIVIDUAL","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6657.heic?v=1764800836"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-12-51g","title":"Sinawan 005 Rumuruti Meteorite Individual, R5-6, 12.51g, Dual Lithology Zones","description":"\u003ch2\u003eA complete individual with contrasting lithology zones\u003c\/h2\u003e\u003cp\u003eThis 12.51g Sinawan 005 individual presents two visually distinct lithology zones separated by a natural boundary visible across the specimen's face. The darker region exhibits fine-grained matrix with densely packed mineral phases, while the lighter zone shows coarser crystalline texture with more prominent chondrule outlines. This dual lithology structure records different thermal or shock histories within the same meteorite parent body, making each zone a snapshot of separate formation or metamorphic environments. The specimen retains partial fusion crust along one edge, preserving the ablation surface from atmospheric entry.\u003c\/p\u003e\u003cp\u003eRumuruti chondrites represent less than half of one percent of all classified meteorites. Sinawan 005 itself comprises only three known specimens worldwide, making this individual a statistically significant portion of the total available material. The R5-6 classification indicates metamorphic grade spanning the transition between type 5 and type 6 equilibration, where mineral compositions approach chemical equilibrium but retain textural evidence of earlier formation stages.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe lithology boundary cuts diagonally across the specimen, creating a natural compositional gradient visible to the naked eye. Chondrules in the lighter zone measure approximately 0.5 to 1.0 millimeters in diameter and show well-defined circular to elliptical outlines, consistent with moderate metamorphic recrystallization. The darker zone displays more homogeneous matrix material with reduced chondrule definition, suggesting higher metamorphic grade or impact processing. Small metal grains distribute throughout both regions, appearing as bright reflective points against the silicate matrix.\u003c\/p\u003e\u003cp\u003eThe preserved fusion crust segment shows characteristic black glassy texture with flow features oriented parallel to the direction of atmospheric flight. Surface regmaglypts are absent, typical for smaller meteorites that experience shorter atmospheric transit times. The interior material shows no visible weathering, indicating minimal terrestrial alteration since recovery in 2023.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eRumuruti chondrites formed on a parent body distinct from ordinary chondrites, evidenced by their elevated oxidation state, low metal content, and distinctive oxygen isotope signatures. The R-chondrite parent body likely experienced impact disruption and reassembly early in solar system history, creating opportunities for mixing of materials with different thermal histories. This process produces the dual lithology structures observed in specimens like Sinawan 005.\u003c\/p\u003e\u003cp\u003eThe R5-6 transitional grade indicates peak metamorphic temperatures between 750°C and 950°C, sufficient to homogenize mineral compositions while preserving relict chondrule textures. Rumuruti chondrites contain iron primarily in silicate minerals rather than metal phases, resulting in their characteristic reddish-brown coloration when weathered. Fresh material like this Sinawan 005 specimen shows the true gray to brown tones of unoxidized silicate matrix. Collectors and researchers studying primitive solar system materials find \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e contexts particularly valuable for understanding parent body processes.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6), confirmed through petrographic analysis and mineral chemistry. This specimen includes a certificate of authenticity documenting its classification and provenance. Search the official database: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eSinawan 005 MetBull entry\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does dual lithology mean in this context?\u003c\/strong\u003e Dual lithology refers to two compositionally or texturally distinct regions within a single meteorite specimen. These zones formed through different metamorphic histories or represent separate materials mixed during impact events on the parent body. The visible boundary between zones in this specimen records that mixing or metamorphic transition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many Sinawan 005 specimens exist?\u003c\/strong\u003e Only three classified specimens of Sinawan 005 are known worldwide, making this one of three complete individuals available to collectors. The total known weight for all Sinawan 005 material has not been published in the Meteoritical Bulletin.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 12.51g meteorite individual and certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy are Rumuruti chondrites significant?\u003c\/strong\u003e Rumuruti chondrites sample a parent body chemically distinct from ordinary, carbonaceous, and enstatite chondrite sources. Their extreme rarity and unique oxidation state provide constraints on nebular conditions and planetesimal formation processes not recorded in more common meteorite types.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eSinawan 005 represents documented rarity at multiple levels: Rumuruti chondrites comprise less than 0.5% of classified meteorites, and only three Sinawan 005 specimens exist in collections worldwide. This individual constitutes a measurable fraction of all available material from this fall. The dual lithology structure adds scientific and visual interest beyond typical single-zone specimens, offering collectors a meteorite with research-grade features in a complete individual form.\u003c\/p\u003e\u003cp\u003eThe 12.51g mass provides sufficient size for display while maintaining accessibility compared to larger specimens from equally rare classifications. Fresh material with minimal weathering preserves original textures and compositions, important for both scientific study and long-term collection value. Collectors building \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e or \u003ca href=\"\/collections\/premium-specimens\"\u003ePremium Specimens\u003c\/a\u003e collections will find few opportunities to acquire R-chondrite material with this combination of classification rarity, specimen count limitation, and distinctive lithology structure.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732996157487,"sku":"SINAWAN-005-12.51G-INDIVIDUAL","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6660.heic?v=1764801045"},{"product_id":"sinawan-005-rumuruti-r5-6-meteorite-r-chondrite-with-dual-lithologies-1-of-3-known-22-82g","title":"Sinawan 005 Rumuruti Meteorite Slice, R5-6, 22.82g, Dual Lithology Zones","description":"\u003ch2\u003eDual lithology R-chondrite with visible compositional boundaries\u003c\/h2\u003e\u003cp\u003eThis Sinawan 005 slice displays sharp boundaries between light and dark lithologies within a single 22.82g specimen. The contrasting zones represent different thermal metamorphic grades preserved in the same meteorite, a diagnostic feature of R5-6 classification. The light region shows coarser-grained recrystallization while the darker zone retains finer textures, visible across the entire face of the slice. Only three specimens of Sinawan 005 exist in collections worldwide.\u003c\/p\u003e\u003cp\u003eRumuruti-type chondrites constitute less than 0.5% of all classified meteorites. This specimen was recovered in Libya in 2023 and classified through analysis documented in the published scientific literature. The R5-6 designation indicates metamorphic grades straddling petrologic types 5 and 6, reflecting complex thermal history in the parent body interior.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe slice reveals two distinct lithologic domains separated by a visible transition zone. The lighter region occupies approximately 60% of the specimen face and displays homogenized mineral grains consistent with type 6 metamorphism. The darker domain retains partial chondrule structure and finer matrix material characteristic of type 5. This textural heterogeneity within a single stone indicates impact mixing or incomplete thermal equilibration on the parent body.\u003c\/p\u003e\u003cp\u003eOlivine grains in both zones show the iron-rich composition typical of Rumuruti chondrites, distinguishing them from ordinary and carbonaceous types. The slice surface has been prepared to highlight the boundary between lithologies without obscuring internal structure. Minor weathering fractures cross both domains, consistent with terrestrial residence time in the Sahara.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eRumuruti chondrites formed on a distinct parent body separate from ordinary, enstatite, and carbonaceous chondrite sources. Oxygen isotope data place R-chondrites outside the terrestrial fractionation line, confirming a unique origin. The high oxidation state and iron-rich olivine composition suggest formation in a different region of the early solar system compared to more common meteorite types.\u003c\/p\u003e\u003cp\u003eThe dual lithology nature of Sinawan 005 specimens indicates the parent body experienced localized heating events or impact-driven mixing after initial formation. Type 5-6 metamorphism requires sustained temperatures between 700 and 950 degrees Celsius, likely achieved through internal radiogenic heating or large impact events. Understanding these transitional types helps constrain thermal evolution models for small planetary bodies. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore how different chondrite groups relate to solar system formation processes.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Sinawan 005 is classified as Rumuruti (R5-6) in the Meteoritical Bulletin Database. You can verify the classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin entry for Sinawan 005\u003c\/a\u003e. A certificate of authenticity documenting the classification accompanies this specimen.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does R5-6 classification mean?\u003c\/strong\u003e The R designation identifies this as a Rumuruti-type chondrite, a rare group with iron-rich olivine. The 5-6 indicates the specimen contains material from two metamorphic grades: type 5 with partial recrystallization and type 6 with complete thermal equilibration. This dual classification reflects heterogeneous heating history preserved in the meteorite.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 22.82g slice shown in the photographs and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy are there only three known specimens?\u003c\/strong\u003e Sinawan 005 was found and classified in 2023, making it a recent discovery. The total known weight recovered was limited, and only three individual specimens have been documented. This reflects both the scarcity of the fall and the rarity of R-chondrites in general.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should I display this dual lithology specimen?\u003c\/strong\u003e The contrasting zones are visible from both sides of the slice. Positioning under directional lighting enhances the boundary between light and dark domains. The specimen displays well in standard meteorite holders or acrylic stands that allow viewing of the entire prepared surface.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eRumuruti chondrites represent less than 0.5% of the meteorite collection population, making any R-type specimen a priority acquisition. Sinawan 005 adds documented scarcity with only three known specimens worldwide. The dual lithology feature provides immediate visual distinction from uniform chondrites and offers a tangible example of incomplete thermal processing.\u003c\/p\u003e\u003cp\u003eThe 22.82g size permits detailed examination of both lithologic zones while remaining display-friendly for cabinet collections. Scientific documentation in published literature adds research provenance beyond standard Meteoritical Bulletin classification. Collectors focusing on \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e or building comprehensive type collections will find limited future opportunities to acquire Sinawan 005 material. For those interested in diverse compositional groups, explore our \u003ca href=\"\/collections\/stony-meteorites\"\u003eStony Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Sinawan%20005\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eSinawan 005\u003c\/a\u003e | Classification: Rumuruti (R5-6) | Find, Libya, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732998549551,"sku":"SINAWAN-005-22.82G-INDIVIDUAL","price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6663.heic?v=1764801202"},{"product_id":"nwa-17707-21-45g-full-slice-ll4-chondrite","title":"NWA 17707 Ordinary Chondrite Meteorite Slice, LL4, 21.45g, Well-Defined Chondrules","description":"\u003ch2\u003eLow-iron chondrite with preserved spherules\u003c\/h2\u003e\n\u003cp\u003eThis 21.45g slice preserves the spherical chondrules that define chondrite meteorites. The LL classification denotes low total iron and low metallic iron content compared to other ordinary chondrite groups. Type 4 metamorphism altered the original minerals without destroying the rounded chondrule boundaries that remain visible throughout the specimen. The fine-grained matrix surrounding each chondrule records the conditions under which dust and molten droplets condensed in the solar nebula.\u003c\/p\u003e\n\u003cp\u003eNWA 17707 was classified in 2024, adding a recently documented specimen to the LL group. The slice format displays the internal structure across a broad surface area, showing how individual chondrules vary in size and composition within the same parent body fragment.\u003c\/p\u003e\n\u003ch2\u003eChondrule structure and matrix composition\u003c\/h2\u003e\n\u003cp\u003eChondrules appear as circular to elliptical domains ranging from submillimeter to several millimeters across. Each formed as a molten droplet that solidified rapidly in the protoplanetary disk before accretion into the parent asteroid. The LL4 petrologic grade indicates these spherules experienced heating between 600 and 700 degrees Celsius, enough to recrystallize olivine and pyroxene while maintaining recognizable chondrule boundaries.\u003c\/p\u003e\n\u003cp\u003eThe groundmass between chondrules contains fine-grained silicate minerals, metal grains, and troilite. Metal content remains lower than in H or L chondrites, giving LL types their characteristic lower density and reduced magnetic response. Dark shock veins may intersect the slice where impact events fractured the parent body.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites constitute approximately 80% of all meteorite falls, but the LL group represents only about 10% of that total. These meteorites sample the outer regions of the main asteroid belt where lower iron abundance reflects distance from the inner solar system during planetary formation. The moderate metamorphism preserved in type 4 specimens provides evidence for thermal processing on asteroids too small to differentiate into core-mantle-crust structures.\u003c\/p\u003e\n\u003cp\u003eChondrules themselves remain one of the most studied features in meteoritics. Their formation mechanism, whether by shock waves, lightning, or other heating events in the solar nebula, continues to drive research into early solar system dynamics. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how these objects preserve records from planetary formation.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17707 received its classification through analysis submitted to the Meteoritical Society. The Meteoritical Bulletin entry confirms the LL4 ordinary chondrite classification. This specimen includes a certificate of authenticity documenting its classification and provenance. Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17707\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the LL4 classification mean?\u003c\/strong\u003e LL indicates low total iron (19-22%) and low metallic iron (1-3%), distinguishing this group from higher-iron H and L chondrites. The number 4 represents petrologic type, indicating moderate thermal metamorphism that recrystallized minerals while preserving chondrule outlines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 21.45g slice ships with a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do chondrules matter scientifically?\u003c\/strong\u003e Chondrules froze from molten droplets within the first few million years of solar system history. Their mineral composition and cooling rates provide direct evidence for temperatures, timescales, and processes active in the protoplanetary disk before planets formed.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eLL chondrites occupy a smaller segment of collections compared to the more common H and L groups, making classified specimens from this series worthwhile additions. The 2024 classification places this material among recently studied falls and finds entering the scientific record. At 21.45g, the slice offers sufficient size to display the chondrule distribution without requiring premium pricing associated with larger slabs.\u003c\/p\u003e\n\u003cp\u003eThe slice format suits both desktop display and study under magnification. Collectors building \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e suites can use this specimen to demonstrate the structural differences between ordinary chondrite groups. The visible chondrules provide immediate visual interest compared to more metamorphosed type 5 and 6 specimens where these features blur into homogeneous texture.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17707\u003c\/a\u003e | Classification: Ordinary Chondrite (LL4) | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748011765807,"sku":"NWA-17707-21.45G-SLICE","price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/FullSizeRender.heic?v=1765209299"},{"product_id":"nwa-17707-27-61g-full-slice-ll4-chondrite","title":"NWA 17707 Ordinary Chondrite Meteorite Slice, LL4, 27.61g, Preserved Chondrules","description":"\u003ch2\u003eFull slice exposing ancient solar nebula material\u003c\/h2\u003e\n\u003cp\u003eThis complete slice cuts through NWA 17707, exposing the internal structure of a primitive ordinary chondrite. Rounded chondrules stand out against the darker matrix material, representing droplets of molten rock that solidified in the solar nebula before planets formed. The slice format reveals the distribution and size variation of these spherical structures throughout the specimen, providing a window into the earliest stages of planetary formation. At 27.61g, this full slice captures a representative cross-section of the meteorite's internal composition.\u003c\/p\u003e\n\u003cp\u003eThe natural contrast between lighter chondrules and darker matrix creates visual depth across the polished surface. Individual chondrules range from sub-millimeter to several millimeters in diameter, each preserving a record of rapid cooling in the protoplanetary disk. The slice maintains structural integrity while revealing the meteorite's internal architecture.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe LL4 classification reflects two defining characteristics visible in this specimen. The LL designation indicates low total iron content (19-22% by mass) and low metallic iron, distinguishing this meteorite from the more iron-rich H and L ordinary chondrite groups. The type 4 petrologic grade indicates moderate thermal metamorphism, enough heat to alter some mineral structures while preserving the original chondrule boundaries. Chondrules remain distinct and easily visible rather than being integrated into a more homogeneous matrix that would characterize higher metamorphic grades.\u003c\/p\u003e\n\u003cp\u003eThe polished surface reveals olivine and pyroxene crystals within the chondrules, surrounded by fine-grained matrix material. Metal flakes appear as small bright inclusions distributed throughout the slice. The chondrule boundaries show clear delineation, a diagnostic feature of type 4 metamorphism that distinguishes this specimen from more heavily altered types 5 and 6.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eNWA 17707 belongs to the ordinary chondrite group, the most abundant meteorite type in collections but each fall providing distinct scientific value. Ordinary chondrites formed in the asteroid belt between Mars and Jupiter approximately 4.567 billion years ago, predating Earth's formation. The LL group specifically derives from parent bodies with depleted iron content compared to other ordinary chondrites, suggesting formation in a different region of the protoplanetary disk where oxygen fugacity was higher.\u003c\/p\u003e\n\u003cp\u003eThe type 4 metamorphic grade indicates the parent asteroid experienced internal heating sufficient to reach temperatures between 600-700°C, likely from decay of short-lived radioactive isotopes like aluminum-26. This heating occurred within the first few million years after solar system formation. Despite this thermal processing, the original chondrule structures survived, making LL4 specimens valuable for studying both nebular condensation processes and early asteroid thermal evolution. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on chondrite classification and formation.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17707 is classified in the Meteoritical Bulletin as an LL4 ordinary chondrite. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting the classification, weight, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does LL4 classification mean?\u003c\/strong\u003e The first L indicates low total iron content (19-22% by weight). The second L indicates low metallic iron content specifically. The number 4 represents the petrologic type, showing the meteorite experienced moderate thermal metamorphism, enough heat to alter mineral chemistry while preserving visible chondrule boundaries. This distinguishes it from type 3 (unmetamorphosed) and types 5-6 (higher metamorphism with integrated chondrules).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 27.61g full slice and a certificate of authenticity. The specimen does not include a display stand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are chondrules scientifically significant?\u003c\/strong\u003e Chondrules are the oldest solid materials in the solar system, forming within the first few million years after the Sun ignited. They condensed directly from the solar nebula as molten droplets, then cooled rapidly before being incorporated into asteroids. Each chondrule preserves information about temperature, oxygen fugacity, and chemical conditions in the protoplanetary disk.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eLL chondrites represent only 10-11% of ordinary chondrite falls, making them less common than H and L groups in collections. The type 4 metamorphic grade occupies a middle position in the petrologic sequence, showing more textural interest than highly metamorphosed types 5-6 while displaying more mineral equilibration than primitive type 3 specimens. This balance makes LL4 specimens particularly educational for understanding metamorphic progression in asteroid interiors.\u003c\/p\u003e\n\u003cp\u003eThe 2024 recovery date places NWA 17707 among recent Saharan finds, with classification completed and published within the past year. Full slices provide optimal display format for chondrites, revealing internal structure that remains hidden in exterior-only specimens. The weight falls in a range suitable for detailed examination while remaining accessible to collectors building comprehensive \u003ca href=\"\/collections\/ordinary-chondrites\"\u003eOrdinary Chondrite\u003c\/a\u003e reference sets across the H, L, and LL groups.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17707\u003c\/a\u003e | Classification: Ordinary Chondrite (LL4) | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748014518319,"sku":"NWA-17707-27.61G-SLICE","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/FullSizeRender_483e0e2e-49b7-40a2-8a64-f4120e41ae50.heic?v=1765210022"},{"product_id":"nwa-17707-30-37g-full-slice-ll4-chondrite","title":"NWA 17707 Ordinary Chondrite Meteorite Slice, LL4, 30.37g, Preserved Chondrules","description":"\u003ch2\u003eFull cross-section of low-iron chondrite\u003c\/h2\u003e\u003cp\u003eThis 30.37g slice captures a complete cross-section through NWA 17707, an LL4 ordinary chondrite classified in 2024. The specimen displays abundant chondrules distributed throughout the matrix, preserved in their original arrangement from 4.5 billion years ago. Light-colored spherules contrast against the darker groundmass, creating a visual record of the solar nebula's earliest solid materials.\u003c\/p\u003e\u003cp\u003eThe slice format exposes internal structure that remains hidden in exterior specimens. Chondrule boundaries appear sharp where thermal metamorphism stopped short of complete recrystallization. The LL designation indicates low total iron and low metal content compared to other ordinary chondrites, while the type 4 classification marks the threshold where these primitive structures begin to blur but have not yet disappeared.\u003c\/p\u003e\u003ch2\u003eChondrule preservation and matrix structure\u003c\/h2\u003e\u003cp\u003eIndividual chondrules range from sub-millimeter to several millimeters across this section. The type 4 metamorphic grade means these spherules retain their boundaries and internal textures, though secondary minerals have begun to homogenize between grains. This intermediate state makes LL4 chondrites valuable for studying the transition from unaltered to thermally processed material.\u003c\/p\u003e\u003cp\u003eThe matrix between chondrules shows fine-grained minerals that recrystallized under heat while the parent asteroid remained intact. This metamorphism occurred through radioactive decay and impact events, not atmospheric entry. The slice reveals this heating was sufficient to alter mineral chemistry but insufficient to destroy the fundamental architecture of these ancient droplets.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eOrdinary chondrites like NWA 17707 formed from dust and molten droplets in the solar nebula before planets existed. The LL group contains less metallic iron than H or L chondrites, suggesting formation in a region of the asteroid belt where metal condensation was limited. Type 4 samples occupy a middle ground in the petrologic sequence, which runs from type 3 (least heated) to type 6 (most metamorphosed without melting).\u003c\/p\u003e\u003cp\u003eThe low metal content affects both appearance and density. LL chondrites typically show muted colors compared to their iron-rich relatives, and they lack the metallic flecks that dominate H chondrite surfaces. This composition reflects local conditions in the protoplanetary disk where temperature and pressure determined which materials could condense into solid form. Understanding these variations helps reconstruct the chemical gradient that existed across the early solar system. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context for how classification systems organize these ancient materials.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17707 received official classification as an LL4 ordinary chondrite and appears in the Meteoritical Bulletin Database. You can verify this classification at the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin entry for NWA 17707\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does LL4 mean?\u003c\/strong\u003e The first L indicates low total iron content, the second L means low metallic iron specifically, and 4 represents the petrologic type indicating moderate thermal metamorphism. This combination describes both composition and thermal history.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 30.37g meteorite slice and a certificate of authenticity. No display stand is included unless specifically noted in the product images.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy are chondrules important?\u003c\/strong\u003e Chondrules are the oldest processed materials in the solar system, frozen droplets that formed when dust melted and rapidly cooled in the solar nebula. Their presence proves this meteorite has not been significantly melted since that time, preserving a direct sample of pre-planetary material.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eFull slices expose interior structure that exterior fragments cannot show. This specimen presents chondrules across its entire face, offering more visual interest than partial sections or fragments where primitive features may be limited to small areas. The 30.37g size provides substantial display presence while remaining accessible compared to larger examples.\u003c\/p\u003e\u003cp\u003eThe 2024 classification makes this a recent addition to the meteorite catalog. Collectors seeking current finds with fresh documentation will find NWA 17707 fits that category. The LL classification is less common than H chondrites in the NWA series, adding compositional diversity to collections focused on ordinary chondrite varieties. Browse additional examples in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection to compare LL, L, and H types side by side.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17707\u003c\/a\u003e | Classification: Ordinary Chondrite (LL4) | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748020187183,"sku":"NWA-17707-30.37G-SLICE","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/FullSizeRender_06a83c14-9557-4818-83a8-2a3b3fd60ad9.heic?v=1765210501"},{"product_id":"nwa-17707-27-29-full-slice-ll4-chondrite","title":"NWA 17707 Ordinary Chondrite Meteorite Slice, LL4, 27.29g, Complete Cross Section","description":"\u003ch2\u003eFull cross section reveals primordial architecture\u003c\/h2\u003e\u003cp\u003eThis complete slice exposes the internal structure of NWA 17707 across its entire 27.29g profile. The polished surface reveals chondrules distributed throughout the meteorite's cross section, preserved within a fine-grained matrix that records conditions from the earliest epoch of the solar system. The LL designation reflects the low total iron and low metal content characteristic of this chemical group, while the type 4 classification indicates thermal processing sufficient to partially recrystallize the matrix without destroying the spherical chondrule structures that formed in the solar nebula.\u003c\/p\u003e\u003cp\u003eFound in Algeria in 2024, this specimen represents recently classified material available to collectors while scientific analysis continues. The full slice format provides the maximum viewable area for a specimen of this mass, making chondrule distribution patterns visible across the meteorite's natural dimensions.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eChondrules appear as lighter circular and elliptical structures against the darker groundmass, ranging from submillimeter to several millimeters in diameter. These spherules formed as molten droplets in the solar nebula before accretion into the parent asteroid. The type 4 metamorphic grade indicates heating to approximately 600-700°C on the parent body, sufficient to cause partial equilibration of minerals while preserving chondrule boundaries.\u003c\/p\u003e\u003cp\u003eThe low metal content typical of LL chondrites results in reduced reflectivity compared to H or L group chondrites. Metal grains present in the matrix appear as small, scattered reflective points rather than the continuous networks seen in higher metal groups. The matrix shows moderate recrystallization, with individual mineral grains visible under magnification but not the complete recrystallization that would characterize higher petrologic types.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eLL chondrites derive from a distinct parent asteroid separate from the sources of H and L group ordinary chondrites. Oxygen isotope ratios confirm this separation, though all ordinary chondrite groups formed in similar regions of the early solar system. The type 4 classification places this specimen in a transitional stage between pristine type 3 material and heavily metamorphosed type 6, providing insight into thermal processes within small asteroids during the first tens of millions of years after solar system formation.\u003c\/p\u003e\u003cp\u003eOrdinary chondrites constitute approximately 87% of all observed meteorite falls, making them the most common meteorite type reaching Earth. However, recently classified specimens like NWA 17707 expand the available sample set for comparative studies. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how chondrules and matrix components record conditions in the protoplanetary disk 4.567 billion years ago.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17707 is classified in the Meteoritical Bulletin as an LL4 ordinary chondrite. Official classification data: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17707 MetBull entry\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does LL4 mean?\u003c\/strong\u003e LL indicates low total iron (19-22% by mass) and low metal content (1-3% metallic iron), the most iron-depleted of the ordinary chondrite groups. The number 4 represents the petrologic type on a scale from 3 (unmetamorphosed) to 6 (extensively recrystallized), indicating moderate thermal processing at temperatures around 600-700°C.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 27.29g meteorite slice and certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy do chondrules form spherical shapes?\u003c\/strong\u003e Chondrules crystallized from molten droplets that achieved spherical geometry through surface tension while floating freely in the solar nebula. Rapid cooling preserved their spherical form before incorporation into the growing asteroid. The preservation of these structures through 4.5 billion years demonstrates that this material never experienced temperatures sufficient to remelt after initial accretion.\u003c\/p\u003e\u003ch2\u003eFull slice format maximizes scientific utility\u003c\/h2\u003e\u003cp\u003eComplete slices offer collectors the ability to observe compositional variations across an entire meteorite profile rather than the limited view provided by partial sections or end cuts. This specimen's 27.29g mass represents substantial material for a full slice, providing viewing area comparable to specimens several times heavier when sold as fragments. The \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection includes specimens across all petrologic types, allowing comparison between primitive and metamorphosed examples from related parent bodies.\u003c\/p\u003e\u003cp\u003eLL chondrites remain underrepresented in many collections despite their scientific significance in establishing the compositional range of ordinary chondrite parent bodies. Recent finds from Northwest Africa continue to expand the available sample diversity, with classification work identifying compositional and textural variations that refine models of asteroid thermal evolution. For collectors focusing on ordinary chondrites, specimens representing all three chemical groups (H, L, LL) document the compositional gradient across the asteroid belt region where these objects formed.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017707\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17707\u003c\/a\u003e | Classification: Ordinary Chondrite (LL4) | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748028706863,"sku":"NWA-17707-27.29G-SLICE","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/FullSizeRender_05c0d640-5911-4267-aafc-75eb2b03ed4a.heic?v=1765210867"},{"product_id":"nwa-12009-ll3-ordinary-chondrite-slice-16-91g","title":"NWA 12009 LL3 Ordinary Chondrite Meteorite Slice, 16.91g, Primitive Unequilibrated Texture","description":"\u003ch2\u003ePrimitive solar system material preserved in stone\u003c\/h2\u003e\u003cp\u003eThis 16.91g slice captures the unequilibrated texture characteristic of Type 3 chondrites, where individual chondrules retain their distinct boundaries and compositions rather than blending into a homogeneous matrix. The polished surface reveals the internal architecture of this primitive material, showing spherical silicate structures suspended in fine-grained matrix. The low-iron composition distinguishes LL chondrites from their higher-metal counterparts, affecting both the visual appearance and the scientific significance of specimens like this one.\u003c\/p\u003e\u003cp\u003eNorthwest Africa yields numerous ordinary chondrite finds, but specimens classified as Type 3 represent a minority. The preservation state reflected in this classification makes NWA 12009 valuable for understanding conditions in the early solar nebula before thermal metamorphism altered the original chondritic structure. The slice format provides access to interior features while maintaining structural integrity across the cut surface.\u003c\/p\u003e\u003ch2\u003eChondrule structure and matrix composition\u003c\/h2\u003e\u003cp\u003eType 3 classification indicates minimal thermal processing after the initial formation of chondrules in the solar nebula. Individual chondrules show varying sizes and textures, reflecting different formation conditions for each spherical inclusion. The matrix surrounding these chondrules contains fine-grained silicate material that has not undergone the recrystallization seen in higher petrologic types. Boundaries between chondrules and matrix remain sharp rather than gradational.\u003c\/p\u003e\u003cp\u003eThe LL designation reflects iron content below 19% by total mass and very low metal abundance compared to other ordinary chondrite groups. This compositional difference affects the specimen's density, magnetic properties, and visual characteristics. Metal grains present in the matrix appear as small scattered inclusions rather than the more abundant distribution seen in H or L chondrites.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eOrdinary chondrites represent the most abundant meteorite type in collections worldwide, yet Type 3 specimens constitute only a fraction of observed falls. The unequilibrated nature of LL3 chondrites preserves information about solar nebula processes that operated approximately 4.56 billion years ago. Chondrules formed through rapid melting and cooling of dust particles in the protoplanetary disk, creating the spherical structures now frozen in the meteorite matrix.\u003c\/p\u003e\u003cp\u003eThe LL parent body experienced less thermal alteration than the parent bodies of equilibrated ordinary chondrites. This lower degree of metamorphism allowed original textures and mineral compositions to persist rather than homogenizing under elevated temperatures. Scientists study Type 3 chondrites to understand the initial building blocks of planetesimals and the conditions present during the earliest stages of solar system formation. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore the broader context of chondritic materials and their role in planetary science research.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 12009 is officially classified in the Meteoritical Bulletin as an LL3 ordinary chondrite. The Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2012009\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 12009\u003c\/a\u003e documents the classification, find circumstances, and petrologic characteristics. Each specimen includes a certificate of authenticity verifying its classification and origin.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does unequilibrated mean in meteorite classification?\u003c\/strong\u003e Type 3 chondrites are unequilibrated, meaning their mineral compositions vary from one chondrule to another rather than achieving chemical uniformity. This preservation of original heterogeneity indicates the parent body never heated sufficiently to allow minerals to equilibrate into consistent compositions throughout the rock. Higher petrologic types (4-6) show increasing degrees of thermal metamorphism and mineral equilibration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 16.91g polished slice and a certificate of authenticity documenting the classification and meteorite name. No display stand is included unless specifically noted in the product variant details.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the LL group differ from other ordinary chondrites?\u003c\/strong\u003e The LL group contains less than 19% total iron and very low metal content compared to L chondrites (20-25% iron) and H chondrites (25-31% iron). This compositional difference reflects distinct formation regions or conditions in the solar nebula. LL chondrites also show lower magnetic susceptibility due to reduced metal abundance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I see chondrules on this polished slice?\u003c\/strong\u003e The polished surface reveals chondrule outlines and internal textures where the cutting plane intersects these spherical structures. Not all chondrules appear as perfect circles since the slice captures random cross-sections through the three-dimensional distribution of chondrules within the matrix. Viewing angle and lighting affect the visibility of individual features.\u003c\/p\u003e\u003ch2\u003eBuilding a chondrite collection\u003c\/h2\u003e\u003cp\u003eType 3 ordinary chondrites occupy a specific niche in meteorite collections due to their primitive character and relatively limited availability compared to equilibrated types. The 16.91g mass provides sufficient surface area to examine chondrule textures while remaining accessible for collectors establishing reference collections of major meteorite groups. The slice format allows direct observation of internal structure without compromising the specimen through aggressive preparation.\u003c\/p\u003e\u003cp\u003eLL chondrites represent one of the three major ordinary chondrite groups, making specimens like NWA 12009 useful for comparative study alongside H and L group examples. The polished finish enhances visibility of internal features while preserving the specimen for long-term display and examination. Collectors building comprehensive \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collections value Type 3 specimens for their distinct petrologic properties and scientific significance.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2012009\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 12009\u003c\/a\u003e | Classification: LL3 Ordinary Chondrite | Find, Northwest Africa, 2017\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755660832815,"sku":"NWA-12009-16.91G-SLICE","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6941.heic?v=1765428407"},{"product_id":"nwa-17496-l3-ordinary-chondrite-end-cut-in-riker-display-w-coa-21-75g","title":"NWA 17496 L3 Chondrite Meteorite End Cut, 21.75g, Riker Display Case, Primitive Unequilibrated","description":"\u003ch2\u003ePrimitive solar system material in display-ready format\u003c\/h2\u003e\u003cp\u003eThis 21.75g polished end cut from NWA 17496 exposes the internal architecture of an L3 ordinary chondrite recovered from Algeria in 2024. The polished surface reveals well-preserved chondrules suspended in a fine-grained matrix, documenting conditions in the early solar nebula before planetary differentiation began. The end cut geometry provides a cross-sectional view through the meteorite's structure while preserving the natural exterior along the specimen's edges.\u003c\/p\u003e\u003cp\u003eThe included riker display case positions this specimen for immediate presentation without requiring additional mounting hardware. The shallow case depth and transparent cover protect the polished surface while maintaining visual access to the chondrule distribution and matrix textures that characterize primitive chondritic material.\u003c\/p\u003e\u003ch2\u003eChondrule preservation and matrix structure\u003c\/h2\u003e\u003cp\u003eThe polished face displays individual chondrules ranging from sub-millimeter to several millimeters in diameter, each representing a discrete melting event in the solar nebula 4.567 billion years ago. The Type 3 classification confirms these spherules retain their original compositions and boundaries without the thermal metamorphism that would homogenize their chemistry in higher petrologic types.\u003c\/p\u003e\u003cp\u003eThe matrix surrounding the chondrules consists of fine-grained silicate minerals, metal grains, and sulfides that accreted in the cooler regions of the protoplanetary disk. This unequilibrated texture preserves chemical and mineralogical gradients that were erased in more thermally processed meteorites, making L3 chondrites valuable records of nebular conditions before parent body assembly.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eL chondrites formed in the asteroid belt from material that accreted before planets completed their growth. The \"L\" designation indicates low total iron content (19-22% by mass) compared to H and LL chondrite groups, reflecting formation in a region of the nebula with reduced metal abundance. Type 3 specimens like NWA 17496 experienced minimal heating after accretion, preserving original textures that were destroyed in chondrites that underwent parent body metamorphism.\u003c\/p\u003e\u003cp\u003eThe preservation of distinct chondrules and unequilibrated mineral compositions makes Type 3 chondrites critical for understanding nebular processes. These specimens retain isotopic and chemical heterogeneities present in the earliest solid materials, providing constraints on the temperature, pressure, and timescales of dust aggregation in the protoplanetary disk. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e for additional context on chondrite formation and classification.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17496 is classified in the Meteoritical Bulletin as an L3 ordinary chondrite. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does \"unequilibrated\" mean for Type 3 chondrites?\u003c\/strong\u003e Unequilibrated indicates the meteorite never experienced temperatures high enough to homogenize the chemical compositions of its minerals. Individual chondrules retain distinct compositions, and olivine grains show variable iron-magnesium ratios rather than the uniform chemistry seen in equilibrated (Type 4-6) chondrites. This preservation of original chemical gradients makes Type 3 specimens valuable for studying nebular conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 21.75g polished end cut presented in a protective riker display case and a certificate of authenticity confirming the classification and specimen details.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the L group differ from H and LL chondrites?\u003c\/strong\u003e The L (low iron) group contains 19-22% total iron by mass, intermediate between the H (high iron, 25-31%) and LL (low iron, low metal, 10-19%) groups. This iron content reflects the oxidation state and metal abundance in the nebular region where L chondrite parent bodies formed, approximately 2.8 AU from the sun based on orbital mechanics of recovered L chondrite falls.\u003c\/p\u003e\u003ch2\u003eDisplay-ready specimen for collectors and educators\u003c\/h2\u003e\u003cp\u003eThe polished end cut format optimizes visibility of internal structures while the riker case provides immediate display capability without additional preparation. The 21.75g mass represents a size that clearly shows chondrule distribution and matrix textures without requiring magnification for initial examination, though detailed inspection reveals additional fine-scale features.\u003c\/p\u003e\u003cp\u003eType 3 chondrites occupy a specific position in collections focused on primitive materials or systematic representations of chondrite petrologic types. The unequilibrated nature of this specimen contrasts with the metamorphosed textures of higher-type ordinary chondrites, illustrating the range of thermal histories experienced by asteroidal parent bodies. Browse additional primitive specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e | Classification: L3 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755671613487,"sku":"NWA-17496-21.75G-ENDCUT","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6956.heic?v=1765429585"},{"product_id":"nwa-17496-l3-ordinary-chondrite-end-cut-in-riker-display-w-coa-21-75g-copy","title":"NWA 17496 Ordinary Chondrite Meteorite Slice, L3, 8.10g, Preserved Chondrules in Riker Display","description":"\u003ch2\u003ePrimitive solar system material in display-ready presentation\u003c\/h2\u003e\u003cp\u003eThis 8.10g slice of NWA 17496 preserves the unequilibrated texture characteristic of Type 3 chondrites. The polished face reveals individual chondrules suspended in a matrix that retains the chemical and mineralogical diversity present when this rock formed 4.6 billion years ago. The specimen arrives in a professional riker display case with foam backing and clear lid, ready for immediate display or study. The L group designation indicates moderate iron content relative to other ordinary chondrites, while the Type 3 classification confirms minimal thermal alteration since accretion in the early solar nebula.\u003c\/p\u003e\u003cp\u003eThe slice format provides access to the internal structure while the riker case protects the specimen from handling and atmospheric exposure. This combination suits collectors seeking displayable specimens and educators demonstrating chondrite classification to students.\u003c\/p\u003e\u003ch2\u003eChondrule preservation and matrix structure\u003c\/h2\u003e\u003cp\u003eType 3 chondrites retain clearly defined boundaries between chondrules and matrix, unlike their more thermally processed Type 4-6 counterparts where these features blur or disappear entirely. Individual chondrules in this specimen show the spherical to sub-spherical forms created by flash heating events in the solar nebula. The polished surface allows direct observation of these structures without magnification, though additional detail emerges under loupe examination.\u003c\/p\u003e\u003cp\u003eThe matrix surrounding the chondrules contains fine-grained silicate minerals, metal grains, and sulfides in their original spatial relationships. This preservation provides a record of conditions in the asteroid belt before planetary differentiation began.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eL ordinary chondrites represent approximately 38% of observed meteorite falls, making them the second most common chondrite group after H types. The moderate iron content distinguishes them chemically from the high-iron H group and low-iron LL group. NWA 17496 belongs to the primitive end of the metamorphic sequence where original nebular materials remain largely unaltered by parent body processes.\u003c\/p\u003e\u003cp\u003eThe Type 3 classification indicates peak metamorphic temperatures below 400°C on the parent asteroid, insufficient to homogenize mineral compositions or erase chondrule boundaries. This preservation allows researchers to study the raw materials that accreted to form asteroids and, eventually, planets. The specimen documents conditions in the region of the solar nebula where ordinary chondrite parent bodies formed, approximately 2-3 AU from the proto-Sun. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on chondrite formation and classification systems.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17496 is classified in the Meteoritical Bulletin as an L3 ordinary chondrite. View the official entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e. Each specimen includes a certificate of authenticity documenting the classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does Type 3 mean in chondrite classification?\u003c\/strong\u003e Type 3 indicates the lowest degree of thermal metamorphism in the petrologic type scale (3-6). These specimens preserve original chondrule textures, distinct mineral boundaries, and unequilibrated chemistry from the solar nebula. Higher types show progressively more thermal alteration and homogenization.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 8.10g slice arrives mounted in a professional riker display case with protective foam backing and clear viewing lid. A certificate of authenticity documents the classification and specimen details.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should I display this specimen?\u003c\/strong\u003e The riker case provides complete display protection and requires no additional mounting. Position away from direct sunlight to prevent foam degradation. The case dimensions allow vertical or horizontal display on shelving or in cabinets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat makes L chondrites different from H and LL types?\u003c\/strong\u003e The L (low iron) designation indicates total iron content of 20-25% by mass, intermediate between H group (25-31%) and LL group (19-22%). This chemical distinction reflects formation in different regions of the asteroid belt with varying metal abundances in the local nebula.\u003c\/p\u003e\u003ch2\u003eType 3 chondrites in meteorite collections\u003c\/h2\u003e\u003cp\u003ePrimitive chondrites serve as baseline specimens in systematic collections, representing the least-processed materials available from the early solar system. The 8.10g mass provides sufficient size for clear chondrule observation while remaining accessible to collectors building comprehensive ordinary chondrite suites. The riker presentation eliminates the need for separate mounting or display cases.\u003c\/p\u003e\u003cp\u003eThe 2024 recovery date indicates recent availability on the market, with classification completed through standard Meteoritical Society protocols. Algeria continues to produce significant numbers of meteorite finds due to favorable preservation conditions in the Sahara, though each specimen undergoes individual classification rather than provisional grouping. Collectors seeking \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e or \u003ca href=\"\/collections\/budget-friendly-pieces\"\u003eBudget Friendly Pieces\u003c\/a\u003e will find this specimen meets both display and study requirements without premium pricing.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e | Classification: L3 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755672039471,"sku":"NWA-17496-8.10G-ENDCUT","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6960.heic?v=1765430204"},{"product_id":"nwa-17496-l3-ordinary-chondrite-slice-in-riker-display-w-coa-10-33g","title":"NWA 17496 L3 Chondrite Meteorite Slice, 10.33g, Riker Display, Preserved Chondrules","description":"\u003ch2\u003eChondrules frozen in time\u003c\/h2\u003e\u003cp\u003eThis 10.33g polished slice of NWA 17496 reveals the defining feature of primitive chondrites: spherical chondrules scattered throughout the matrix. These millimeter-scale silicate spheres formed as molten droplets in the early solar nebula 4.6 billion years ago, cooling rapidly in space before accreting into the parent asteroid. The Type 3 classification indicates minimal thermal alteration, preserving the original textures and mineralogy from the solar system's formative period. The polish exposes chondrule boundaries, internal structure, and the fine-grained matrix that binds them.\u003c\/p\u003e\u003cp\u003eL chondrites derive their designation from low total iron content compared to H chondrites, with approximately 7-11% total iron and reduced metal abundance. This specimen shows the characteristic light gray matrix punctuated by darker chondrules and occasional metal grains. The slice format maximizes the visible cross-sections of chondrules, displaying their varied internal textures from barred to radial pyroxene structures.\u003c\/p\u003e\u003ch2\u003eTextural preservation and surface detail\u003c\/h2\u003e\u003cp\u003eThe polished surface treatment brings structural clarity to this primitive meteorite. Individual chondrules appear as circular to elliptical features depending on the plane of the cut, with diameters ranging from submillimeter to several millimeters. The matrix between chondrules contains fine-grained olivine and pyroxene crystals that never experienced significant recrystallization. Metal grains appear as bright reflective points scattered through the groundmass.\u003c\/p\u003e\u003cp\u003eType 3 chondrites occupy a critical position in meteorite classification as the least thermally processed specimens. Unlike Types 4-6, which experienced progressive heating on their parent bodies, Type 3 specimens retain heterogeneous mineral compositions within individual chondrules and preserve volatile elements that would have been lost at higher temperatures. This makes them valuable for understanding pre-accretionary processes in the solar nebula.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eOrdinary chondrites constitute approximately 80% of observed meteorite falls, yet each specimen provides data points for understanding differentiation processes in the early solar system. The L chondrite parent body, an asteroid in the main belt, experienced a catastrophic collision approximately 470 million years ago that scattered fragments throughout the inner solar system. This event dramatically increased the flux of L chondrite material reaching Earth.\u003c\/p\u003e\u003cp\u003eThe Type 3 designation reflects petrologic grade determined by homogeneity of olivine and pyroxene compositions, with Type 3 showing the widest compositional ranges within individual mineral grains. Chondrules themselves record flash heating events in the solar nebula, with formation temperatures exceeding 1500°C followed by cooling rates of hundreds of degrees per hour. The variety of chondrule textures visible in cross-section reflects different thermal histories and precursor compositions. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how classification systems organize these specimens by composition and thermal history.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17496 is classified in the Meteoritical Bulletin as an L3 ordinary chondrite found in Algeria in 2024. You can verify the classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting the classification and weight.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat makes Type 3 chondrites scientifically important?\u003c\/strong\u003e Type 3 represents the most primitive thermal grade, preserving original solar nebula materials with minimal parent body processing. Higher types (4-6) experienced increasing metamorphism that homogenized minerals and destroyed primary textures. Type 3 specimens retain the chemical and structural diversity present when the parent asteroid first formed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 10.33g meteorite slice, professional riker display case for protected viewing, and certificate of authenticity. The riker case features a glass top and foam backing for secure specimen presentation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I see individual chondrules without magnification?\u003c\/strong\u003e Yes, several chondrules are visible to the naked eye as circular features in the polished surface. A hand lens or magnification will reveal finer structural details including chondrule rim boundaries, internal crystal textures, and matrix composition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between L and H chondrites?\u003c\/strong\u003e The letter designation refers to total iron content and metal abundance. L (low iron) chondrites contain 20-25% total iron with 4-10% metal, while H (high iron) chondrites contain 25-31% total iron with 15-19% metal. This affects both magnetic properties and visual appearance, with L chondrites showing less metallic luster.\u003c\/p\u003e\u003ch2\u003eDisplay-ready primitive material\u003c\/h2\u003e\u003cp\u003eThe riker case presentation eliminates the need for additional mounting or framing. The slice sits securely in foam backing behind glass, ready for shelf or desk display. At 10.33g, this represents a substantial cross-section for observing chondrule distribution and matrix characteristics. The polished finish provides immediate visual access to internal structure without requiring specialized lighting.\u003c\/p\u003e\u003cp\u003eFor collectors building systematic reference collections, L3 specimens fill a specific niche documenting primitive, low-iron ordinary chondrite material. The 2024 find date makes this recently classified material with fresh market availability. The combination of scientific accessibility and display readiness makes this suitable for both educational reference and private collections. Browse additional primitive specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection to compare textural characteristics across different chemical groups and petrologic types.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e | Classification: L3 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755673972783,"sku":"NWA-17496-10.33G-SLICE","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6964.heic?v=1765430459"},{"product_id":"nwa-17496-l3-ordinary-chondrite-end-cut-in-riker-display-w-coa-13-23","title":"NWA 17496 Chondrite Meteorite End Cut, L3, 17.40g, Preserved Chondrules in Riker Display","description":"\u003ch2\u003ePrimitive solar system building blocks on display\u003c\/h2\u003e\n\u003cp\u003eThis 17.40g polished end cut exposes the internal structure of NWA 17496, a Type 3 ordinary chondrite classified in 2024. The polished surface reveals spherical chondrules, submillimeter droplets of once-molten silicate that condensed in the solar nebula 4.567 billion years ago. Type 3 specimens retain their original textures with minimal thermal alteration, making chondrule boundaries distinct and their internal structures visible. The cut preserves the contrast between these spherical components and the fine-grained matrix surrounding them.\u003c\/p\u003e\n\u003cp\u003eThe specimen arrives in a professional riker display case with foam backing and clear lid, ready for shelf display or educational demonstration. The case protects the polished surface while keeping structural features visible without handling.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe L3 classification denotes a low total iron content (19-22% by mass) compared to other ordinary chondrite groups, with approximately 7-11% metallic iron-nickel distributed throughout. As an unequilibrated Type 3 specimen, this meteorite shows compositional variation between individual chondrules, each preserves its formation chemistry rather than homogenizing through parent body heating. The polished surface exposes chondrule margins where olivine and pyroxene grains meet the darker, finer matrix. Metal grains appear as bright flecks scattered through the section.\u003c\/p\u003e\n\u003cp\u003eEnd cuts like this one section the meteorite perpendicular to any natural face, revealing internal structure rather than weathered exterior. The polish grade brings out textural detail while maintaining scientific integrity, the slice remains thick enough to show three-dimensional chondrule distribution rather than presenting only a thin section view.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites constitute approximately 87% of all meteorite falls and represent material from numerous parent asteroids in the main belt between Mars and Jupiter. The L group, distinguished by lower iron content than H chondrites but higher than LL types, likely derives from several related parent bodies disrupted by collisions over solar system history. Type 3 classification indicates peak metamorphic temperatures remained below 600°C, insufficient to erase original chondrule textures or equilibrate mineral compositions.\u003c\/p\u003e\n\u003cp\u003eNWA 17496 was recovered in Algeria and classified in 2024, adding to the scientific dataset for L3 chondrites. These specimens preserve records of processes that occurred in the solar nebula before planets formed, when dust and droplets collided and accreted into larger bodies. The visible chondrules formed through rapid cooling of silicate melt droplets, likely during energetic events in the protoplanetary disk. For comprehensive background on meteorite classification and how scientists identify different types, see \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17496 is classified in the Meteoritical Bulletin as an L3 ordinary chondrite. You can verify the classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. Each specimen includes a certificate of authenticity documenting its classification, weight, and recovery details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does Type 3 mean for chondrites?\u003c\/strong\u003e Type 3 indicates minimal thermal metamorphism on the parent asteroid. Chondrules retain their original boundaries and internal structures rather than recrystallizing into uniform texture. Type 3 chondrites are considered primitive because they preserve features from the earliest solar system, before parent body heating altered mineral compositions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 17.40g polished end cut, professional riker display case with foam backing and clear viewing lid, and certificate of authenticity. No stand is included, the riker case is designed for shelf or table display.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I display this specimen?\u003c\/strong\u003e The riker case protects the polished surface from dust and handling while allowing clear viewing. Place the case on a flat surface away from direct sunlight to prevent foam degradation. The case can be opened to examine the specimen more closely, but avoid touching the polished face to prevent fingerprints on the surface.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between L, H, and LL chondrites?\u003c\/strong\u003e The letters denote total iron content and the amount present as metal versus bound in silicates. H (high iron) chondrites contain 25-31% total iron, L (low iron) contain 19-22%, and LL (low iron, low metal) contain 19-22% total iron but less free metal. These groups likely formed on separate parent asteroids with different oxidation states during accretion.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eType 3 ordinary chondrites appeal to collectors seeking specimens that show visible internal structure without magnification. The 17.40g size provides substantial display presence while remaining accessible for new collectors building reference collections. The riker case format eliminates the need for additional display materials and protects the specimen from handling damage. Collectors building systematic representations of meteorite types value L group specimens as examples of moderate iron content between the more metal-rich H chondrites and metal-poor LL types.\u003c\/p\u003e\n\u003cp\u003eThe 2024 classification date makes this a recent addition to the Meteoritical Bulletin, representing freshly classified material rather than older stock. The polished end cut format serves both aesthetic and educational purposes, the internal structure teaches solar system formation processes while the presentation quality suits shelf display. For collectors focused on primitive solar system materials, explore our complete selection of \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17496\u003c\/a\u003e | Classification: L3 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755682099247,"sku":"NWA-17496-17.40G-ENDCUT","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6968.heic?v=1765430991"},{"product_id":"nwa-17496-l3-ordinary-chondrite-slice-in-riker-display-w-coa-13-23g","title":"NWA 17496 Chondrite Meteorite Slice, L3, 13.23g, Preserved Chondrules in Riker Display","description":"\u003ch2\u003ePrimitive chondrules frozen in time\u003c\/h2\u003e\u003cp\u003eThis 13.23g polished slice reveals the pristine internal structure of NWA 17496, a Type 3 ordinary chondrite recovered from Algeria in 2024. The polished surface exposes individual chondrules--spherical grains that formed as molten droplets in the solar nebula 4.6 billion years ago. Type 3 meteorites preserve these features in their original state, unaltered by the thermal metamorphism that obscures chondrules in more equilibrated specimens. The slice captures this primitive texture across its entire face, with metal flecks distributed throughout the silicate matrix.\u003c\/p\u003e\u003cp\u003eThe specimen arrives ready for display in a professional riker case with foam backing, protecting the polished surface while allowing clear viewing of the chondrule population. The transparent lid keeps dust away while maintaining visibility from all angles.\u003c\/p\u003e\u003ch2\u003eChondrule structure and matrix composition\u003c\/h2\u003e\u003cp\u003eThe polished face shows distinct chondrules ranging from submillimeter to several millimeters in diameter, each preserving its original spherical or ellipsoidal geometry. These structures formed through rapid cooling of molten silicate droplets in the protoplanetary disk, flash-frozen before they could crystallize into uniform minerals. The surrounding matrix contains fine-grained olivine and pyroxene in unequilibrated proportions--meaning individual mineral grains retain compositional variations rather than homogenizing through heat.\u003c\/p\u003e\u003cp\u003eMetal grains appear as bright flecks throughout the section, characteristic of L chondrites which contain lower total iron than H chondrites but still host abundant kamacite and taenite. The polish brings out the contrast between metal, chondrules, and matrix, making the meteorite's internal architecture immediately visible.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eL ordinary chondrites represent the second most common type of meteorite fall, accounting for roughly 35% of all observed meteorite falls worldwide. The \"L\" designation refers to low total iron content relative to H chondrites, typically 7-11% metallic iron by mass. These meteorites derive from parent body or bodies in the main asteroid belt that never underwent the internal heating required to melt and differentiate into core-mantle structures.\u003c\/p\u003e\u003cp\u003eType 3 classification marks this specimen as petrologic grade 3, the most primitive category that still qualifies as a true chondrite. At this grade, chondrules remain sharply defined with glassy mesostasis, and the matrix has experienced minimal recrystallization. Types 4-6 show progressive thermal metamorphism that gradually erases original textures. NWA 17496's Type 3 status means its chondrules preserve formation conditions from the earliest epoch of solar system history. \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin classification\u003c\/a\u003e confirms this specimen's authenticity and petrologic grade.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17496 is classified in the Meteoritical Bulletin as an L3 ordinary chondrite from Algeria, found in 2024. Full classification data: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and weight.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does Type 3 mean?\u003c\/strong\u003e Type 3 is the petrologic grade indicating minimal thermal alteration. Chondrules retain their original sharp boundaries and glassy interiors, and minerals remain unequilibrated--they haven't homogenized through heat. This makes Type 3 chondrites the most primitive specimens available to collectors, preserving solar nebula formation conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 13.23g slice, professional riker display case with foam backing and transparent lid, and certificate of authenticity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy are chondrules scientifically important?\u003c\/strong\u003e Chondrules are the oldest known solid materials in the solar system, formed during the first few million years of disk evolution. Their textures record cooling rates, nebular temperatures, and the physics of dust aggregation. Type 3 chondrites like this preserve chondrule populations in near-pristine condition, making them windows into conditions that no longer exist anywhere in the solar system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should I display this specimen?\u003c\/strong\u003e The included riker case is designed for shelf or cabinet display. Keep it away from direct sunlight to prevent potential fading of the foam backing. The transparent lid protects the polished surface from dust and handling while maintaining full visibility. No additional preparation is required.\u003c\/p\u003e\u003ch2\u003eReady-to-display primitive material\u003c\/h2\u003e\u003cp\u003eThis slice requires no additional mounting or preparation. The riker case provides immediate display capability for home collections, classroom demonstrations, or office shelving. At 13.23g, the specimen offers substantive size while remaining accessible to collectors building type collections or focusing on primitive chondrites.\u003c\/p\u003e\u003cp\u003eL3 chondrites occupy a specific niche in systematic collections: common enough to be obtainable, primitive enough to show textbook chondrule structure, and visually distinct from more metamorphosed grades. This specimen fits into \u003ca href=\"\/collections\/chondrites\"\u003echondrite collections\u003c\/a\u003e focused on petrologic diversity or unequilibrated specimens. The 2024 recovery date marks it as recently classified material entering the market.\u003c\/p\u003e\u003ch2\u003eClassification reference\u003c\/h2\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017496\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17496\u003c\/a\u003e | Classification: L3 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44755693600815,"sku":"NWA-17496-13.23G-SLICE","price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_69712.heic?v=1765431207"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-flight-oriented-extremely-fresh-fusion-crust-w-coa-820-15g","title":"NWA XXX Ordinary Chondrite Meteorite Individual, unclassified, 820.15g, Flight Oriented with Contraction Cracks","description":"\u003ch2\u003eWedge-shaped atmospheric entry profile\u003c\/h2\u003e\n\u003cp\u003eThis 820.15g ordinary chondrite individual exhibits pronounced flight orientation visible in its wedge-shaped form and asymmetric fusion crust distribution. The leading surface shows complete ablation features including deep regmaglypts and parallel contraction cracks that formed as the molten crust cooled during atmospheric deceleration. Fusion crust covers approximately 99% of the specimen surface, displaying minimal terrestrial weathering since its recent 2025 recovery in Morocco.\u003c\/p\u003e\n\u003cp\u003eThe orientation geometry indicates stable flight through the atmosphere, with the blunt leading edge bearing the majority of thermal stress. This specimen's low magnetic response suggests possible LL group classification, though laboratory analysis would be required for definitive typing. The preserved contraction crack network documents the thermal shock gradient between the superheated surface and cooler interior during the final seconds of atmospheric flight.\u003c\/p\u003e\n\u003ch2\u003eFusion crust preservation and surface features\u003c\/h2\u003e\n\u003cp\u003eThe fusion crust exhibits exceptional preservation across the entire specimen, showing the glossy black glass coating formed by friction-induced melting during atmospheric entry. Regmaglypts indent the leading surface in parallel rows, marking zones where turbulent air flow stripped away molten material. These thumbprint-like depressions range from shallow curves to deep pockets, documenting the complex aerodynamic forces acting on the meteorite during hypersonic flight.\u003c\/p\u003e\n\u003cp\u003eContraction cracks radiate across the primary ablation surface in a pattern characteristic of rapid cooling. These fractures developed as the molten fusion crust solidified while the meteorite continued decelerating, creating tensile stress in the cooling glass layer. The crack spacing and orientation provide a record of the thermal gradient and flight attitude during the final phase of atmospheric passage.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites represent the most abundant meteorite type recovered on Earth, comprising material from asteroids that never underwent planetary differentiation. These meteorites preserve primitive solar system matter, including chondrules formed in the solar nebula approximately 4.567 billion years ago. The three groups (H, L, LL) differ primarily in their iron content and oxidation state, reflecting formation in distinct regions of the asteroid belt.\u003c\/p\u003e\n\u003cp\u003eFlight-oriented specimens document the physics of atmospheric entry, providing physical evidence of ablation processes, shock heating, and aerodynamic stability during deceleration from cosmic velocities. The preservation of oriented features requires specific flight conditions and mass retention during atmospheric passage. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how fusion crust forms and what chondrules reveal about solar system formation.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is confirmed as an ordinary chondrite based on physical characteristics including fusion crust composition, magnetic properties, and interior texture. While unclassified specimens have not undergone laboratory analysis to determine specific subtype (H, L, or LL) or petrologic grade, authentication as genuine meteoritic material is certain. Each purchase includes a certificate of authenticity documenting the specimen's meteorite classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"unclassified\" mean for this meteorite?\u003c\/strong\u003e Unclassified indicates that formal laboratory analysis including thin section preparation, electron microprobe analysis, and detailed mineral chemistry has not been completed. Classification requires destructive sampling and significant expense, which many collectors prefer to avoid for display specimens. The meteorite's authenticity is not in question, only its specific subgroup designation within the ordinary chondrite category.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat causes contraction cracks in fusion crust?\u003c\/strong\u003e Contraction cracks form when the molten fusion crust layer cools and solidifies during atmospheric deceleration. The surface cools faster than the interior, creating tensile stress in the solidifying glass coating. These cracks propagate through the crust in patterns determined by the thermal gradient, flight orientation, and cooling rate during the final seconds of atmospheric passage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This 820.15g individual meteorite ships with a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does low magnetic response suggest LL classification?\u003c\/strong\u003e Ordinary chondrites are subdivided by total iron content: H (high, 25-31% iron), L (low, 20-25%), and LL (low iron, low metal, 19-22%). Lower metallic iron content produces weaker magnetic attraction. This specimen's reduced magnetic response indicates lower free metal abundance, consistent with L or LL group chemistry, though definitive classification requires laboratory analysis of mineral compositions.\u003c\/p\u003e\n\u003ch2\u003eDisplay value for atmospheric entry documentation\u003c\/h2\u003e\n\u003cp\u003eCollectors seeking specimens that document atmospheric entry processes value oriented meteorites for their scientific legibility. This individual preserves the complete sequence of ablation features in their original geometric relationship: leading surface orientation, regmaglypt distribution, and contraction crack patterns. The 820.15g mass provides substantial physical presence while remaining manageable for display and handling.\u003c\/p\u003e\n\u003cp\u003eRecent finds with minimal weathering offer fusion crust preservation superior to historic falls, where decades of terrestrial exposure degrade surface features. This 2025 recovery displays the pristine black glass coating and sharp regmaglypt boundaries characteristic of fresh material. The specimen functions equally well in educational contexts and private collections, providing direct physical evidence of the physics governing meteorite flight and survival through Earth's atmosphere. Explore additional \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e to compare fusion crust preservation and orientation features across different fall events and recovery conditions.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44756852998191,"sku":"NWA-XXX-820.15G-INDIVIDUAL-ORIENTED","price":999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6976.heic?v=1765465748"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-flight-oriented-extremely-fresh-fusion-crust-w-coa-635-58","title":"NWA XXX Ordinary Chondrite Meteorite Individual, unclassified, 635.58g, Flight Oriented with Regmaglypts","description":"\u003ch2\u003eFlight-oriented chondrite with pristine atmospheric entry features\u003c\/h2\u003e\n\u003cp\u003eThis 635.58g ordinary chondrite individual preserves the classic geometry of atmospheric flight orientation. The forward-facing surface shows a smooth, continuous fusion crust interrupted by thermal contraction cracks that formed as the exterior cooled rapidly during deceleration. Regmaglypts, thumbprint-like depressions sculpted by ablation, cover the oriented surface, documenting differential melting as the meteorite maintained stable orientation through the atmosphere. The preservation extends to 99% of the specimen's surface, with minimal post-fall weathering obscuring the original entry features.\u003c\/p\u003e\n\u003cp\u003eThe specimen's magnetic response suggests possible L-group classification, though laboratory analysis has not been completed. The intact crust and oriented geometry make this a textbook example of controlled atmospheric entry, where aerodynamic forces kept one face consistently forward during descent.\u003c\/p\u003e\n\u003ch2\u003eFusion crust and thermal features\u003c\/h2\u003e\n\u003cp\u003eThe black glassy fusion crust formed at temperatures exceeding 1,600°C as atmospheric friction vaporized the meteorite's leading edge. Contraction cracks radiate across the crust where rapid cooling created tensile stress in the newly formed glass. These fractures often expose the lighter interior material, creating a network of contrast against the dark exterior. Secondary flow features, areas where molten material streamed toward the trailing edge, are visible along the specimen's margins.\u003c\/p\u003e\n\u003cp\u003eRegmaglypts range from shallow impressions to deep pits several millimeters across. These features result from localized vortices in the boundary layer flow, where turbulent air removed material at different rates across the surface. The depth and distribution of regmaglypts indicate the intensity and duration of atmospheric heating this specimen experienced before deceleration reduced ablation rates.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites formed 4.567 billion years ago in the protoplanetary disk, accreting from dust and millimeter-sized chondrules before their parent asteroids underwent thermal metamorphism. The H, L, and LL groups are distinguished by their iron content and oxidation state, reflecting formation at different heliocentric distances where temperature and oxygen fugacity varied. This specimen's classification remains pending laboratory analysis, but magnetic response provides preliminary constraint on likely group membership.\u003c\/p\u003e\n\u003cp\u003eOriented meteorites represent a small fraction of recovered falls and finds. Most meteorites tumble chaotically during atmospheric entry, producing uniform fusion crust without directional features. Stable orientation requires specific mass distribution and entry angle, making oriented specimens valuable for studying ablation physics and atmospheric flight dynamics. For more on meteorite classification and formation, see \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is an authenticated ordinary chondrite, confirmed through visual inspection, magnetic response testing, and comparison with classified reference material. While full laboratory classification (determining H, L, or LL group and petrologic type) has not been completed, the specimen exhibits all diagnostic features of an ordinary chondrite meteorite: chondritic interior texture, fusion crust, regmaglypts, and appropriate magnetic signature. A certificate of authenticity documenting these characteristics is included. For classified ordinary chondrites, see the Meteoritical Bulletin database at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php\" rel=\"noopener\" target=\"_blank\"\u003elpi.usra.edu\/meteor\/metbull.php\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does flight-oriented mean?\u003c\/strong\u003e Flight orientation occurs when a meteorite maintains the same face forward throughout atmospheric entry, rather than tumbling randomly. This stable flight produces asymmetric features: pronounced regmaglypts and smooth crust on the leading face, with flow lines extending toward the trailing edge. Oriented specimens are less common than randomly oriented stones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This 635.58g individual, with a certificate of authenticity documenting its characteristics and find information. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this specimen unclassified?\u003c\/strong\u003e Classification requires laboratory analysis including thin section petrography, mineral chemistry determination, and sometimes oxygen isotope measurement. These procedures cost several hundred dollars and require destructive sampling. Many recovered meteorites, particularly ordinary chondrites from Northwest Africa, remain unclassified due to the cost-benefit ratio of full analysis. Unclassified status does not affect authenticity, this is a confirmed meteorite.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are contraction cracks?\u003c\/strong\u003e Contraction cracks form when fusion crust cools rapidly from ablation temperatures to ambient temperature within seconds of meteorite deceleration. The glassy crust shrinks faster than the interior, creating tensile stress that fractures the surface. These cracks are diagnostic features of genuine fusion crust and cannot be replicated artificially.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collection value\u003c\/h2\u003e\n\u003cp\u003eAt 635.58g, this specimen offers substantial visual presence while remaining affordable compared to classified ordinary chondrites with published Meteoritical Bulletin entries. The oriented geometry and exceptional crust preservation make this suitable for educational display, demonstrating atmospheric entry phenomena to students and public audiences. Collectors focused on fusion crust quality or oriented specimens will find the regmaglypt development and thermal cracking particularly well expressed on this piece.\u003c\/p\u003e\n\u003cp\u003eThe unclassified status provides an opportunity to acquire a large, visually striking ordinary chondrite at a lower price point than similarly sized classified stones. For collectors building \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collections, this specimen documents atmospheric entry processes with clarity comparable to more expensive oriented falls. The fresh condition indicates recent recovery, with minimal terrestrial weathering degrading the original surface features.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: This specimen has not been submitted for formal classification. | Find, Morocco, 2025\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44756865548335,"sku":"NWA-XXX-635.58G-INDIVIDUAL-ORIENTED","price":635.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6986.heic?v=1765466638"},{"product_id":"ait-saoun-eh3-enstatite-witnessed-fall-crusted-individual-w-coa-7-88g","title":"Ait Saoun Enstatite Chondrite Meteorite Individual, EH3, 7.88g, Complete Fusion Crust","description":"\u003ch2\u003eFlight-oriented individual with complete natural surface\u003c\/h2\u003e\n\u003cp\u003eThis Ait Saoun individual retains the complete fusion crust formed during atmospheric entry, with pronounced flight orientation and well-defined regmaglypts across the surface. The specimen's aerodynamic shaping records the stable orientation it held as it decelerated through the atmosphere in 2024. At 7.88g, this complete stone preserves the natural surface geometry created during the witnessed fall in Morocco.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust shows the characteristic dark, glassy coating formed as the meteorite's exterior melted and ablated during entry heating. Regmaglypts, thumbprint-like depressions, mark where differential ablation carved into the surface. The flight orientation indicates this stone maintained a consistent leading-edge position during descent, creating asymmetric surface features that document its trajectory.\u003c\/p\u003e\n\u003ch2\u003eEnstatite chondrite composition and texture\u003c\/h2\u003e\n\u003cp\u003eEH3 classification places this specimen in the high-iron enstatite chondrite group, characterized by highly reduced mineral assemblages that formed in oxygen-depleted regions of the early solar system. The \"3\" designation indicates minimal thermal metamorphism, preserving primitive features including distinct chondrules and original mineral chemistry. Enstatite chondrites contain iron-bearing sulfides and metal alloys rarely found in ordinary chondrites.\u003c\/p\u003e\n\u003cp\u003eThe complete crust conceals internal structure, but EH3 meteorites typically display well-defined chondrules set in a fine-grained matrix rich in enstatite pyroxene. These meteorites formed under conditions so reducing that even elements normally found as oxides occur as sulfides or in metallic form. The preservation of unaltered chondrules in type 3 specimens provides insight into earliest solar system processes.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eEnstatite chondrites represent some of the most chemically reduced materials in the solar system, forming in environments where oxygen was nearly absent. Their unusual chemistry, including silicon dissolved in metallic iron and nitrogen-bearing minerals, suggests formation conditions distinct from other chondrite groups. Some researchers propose enstatite chondrites as potential building blocks for Earth's core and mantle, based on oxygen isotope similarities.\u003c\/p\u003e\n\u003cp\u003eThe witnessed fall status confirms this specimen's extraterrestrial origin and establishes its terrestrial arrival date, eliminating ambiguity about weathering history. Fresh falls provide optimal material for laboratory analysis because they lack the oxidation and alteration that affect finds exposed to Earth's environment. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how classification systems document meteorite diversity.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is classified as EH3 (Enstatite, high iron) in the Meteoritical Bulletin. Verification: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Ait%20Saoun\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eAit Saoun\u003c\/a\u003e. Certificate of authenticity included with purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"flight-oriented\" mean?\u003c\/strong\u003e Flight orientation refers to the stable position a meteorite maintains during atmospheric descent, creating asymmetric surface features. The leading edge experiences more ablation than the trailing surfaces, producing directional regmaglypts and differential crust thickness visible on this specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 7.88g complete individual with original fusion crust and certificate of authenticity. No display stand included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are enstatite chondrites scientifically significant?\u003c\/strong\u003e EH chondrites formed under the most oxygen-depleted conditions known in meteorite parent bodies. Their extreme reduction produced mineral assemblages that help constrain early solar system chemistry and may provide clues to Earth's composition, particularly the core-mantle boundary region.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts?\u003c\/strong\u003e Regmaglypts are the thumbprint-like depressions sculpted into fusion crust by turbulent airflow during atmospheric entry. Differential heating and ablation create these concave features, which are prominent on this specimen's surface.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eComplete individuals with intact fusion crust represent the most naturally preserved form of meteorites available to collectors. This specimen's witnessed fall status and fresh surface condition make it substantially more desirable than finds of unknown terrestrial residence time. The flight orientation and prominent regmaglypt development provide clear evidence of atmospheric passage, features that become educational focal points in any collection.\u003c\/p\u003e\n\u003cp\u003eAt 7.88g, this individual offers substantial size while remaining accessible compared to larger witnessed fall specimens. Enstatite chondrites constitute approximately 2% of observed falls, making them considerably less common than ordinary chondrites in the market. The 2024 fall date ensures minimal oxidation and optimal preservation of original surface features. Collectors seeking documented provenance and complete natural morphology will find this specimen meets both criteria. Browse additional specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Ait%20Saoun\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eAit Saoun\u003c\/a\u003e | Classification: EH3 (Enstatite, high iron) | Fall, Ait Saoun, Morocco, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44756890320943,"sku":"AIT-SAOUN-7.88G-INDIVIDUAL","price":690.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/ait-saoun-eh3.png?v=1766199434"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-313-16g-w-window","title":"NWA XXX Unclassified Ordinary Chondrite Meteorite Individual, 313.16g, Oriented with Fusion Crust Window","description":"\u003ch2\u003eOriented atmospheric entry preserved in fusion crust\u003c\/h2\u003e\n\u003cp\u003eThis 313.16g ordinary chondrite preserves the complete thermal signature of controlled atmospheric flight. The specimen's orientation is visible in the asymmetric fusion crust patterns, with thicker ablation on the leading surface and flow lines radiating toward the trailing edge. A precision-cut polished window exposes the internal chondritic matrix without compromising the exterior crust integrity.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust retains its original black luster with minimal weathering, characteristic of fresh finds in the hyperarid Western Sahara environment. Surface regmaglypts show shallow development, consistent with a relatively brief atmospheric passage before deceleration and fall.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe polished window reveals a light gray matrix densely packed with chondrules ranging from submillimeter to 2mm in diameter. Metal grains distributed throughout the groundmass reflect light under direct illumination. The chondrule population displays variable textures, with both well-defined spherical forms and irregularly shaped objects visible in cross-section.\u003c\/p\u003e\n\u003cp\u003eFusion crust thickness varies from 0.3mm on the trailing surface to approximately 0.8mm at the apex of orientation, documenting differential heating during descent. The crust-matrix boundary shows sharp contact with no infiltration or secondary alteration. No shock veining or brecciation is apparent in the exposed interior.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites constitute approximately 87% of observed meteorite falls, making them our most abundant samples of early solar system material. These meteorites formed 4.56 billion years ago in the asteroid belt from dust and millimeter-sized chondrules that accreted before planetary differentiation occurred. The chondrules themselves are older still, melt droplets that froze in the solar nebula before asteroids assembled.\u003c\/p\u003e\n\u003cp\u003eUnclassified specimens await formal petrographic analysis to determine their specific group (H, L, or LL) and petrologic type (3-6). Classification requires thin-section analysis of olivine and pyroxene compositions, along with metal content measurements. Despite lacking formal classification, the specimen's texture and appearance place it confidently within the ordinary chondrite family. Collectors interested in the fundamentals of meteorite science will find comprehensive information at \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is identified as an unclassified ordinary chondrite based on diagnostic features including chondrule-rich matrix, metal distribution, and fusion crust characteristics. While formal Meteoritical Bulletin classification is pending, the meteorite displays all structural markers of the ordinary chondrite group. A certificate of authenticity documenting provenance and physical characteristics is included with purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for a meteorite?\u003c\/strong\u003e Orientation indicates the specimen maintained stable flight attitude during atmospheric entry, with one surface consistently facing forward. This produces asymmetric fusion crust with thicker ablation on the leading edge and distinctive flow patterns. Oriented specimens are significantly less common than tumbling meteorites, which develop uniform fusion crust on all surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the fusion crust \"fresh\" on this specimen?\u003c\/strong\u003e Fresh fusion crust retains its original black color and glassy texture without oxidation or weathering. This specimen's 2024 find date in the Western Sahara's arid climate allowed minimal terrestrial alteration. Contrast this with older finds where crust turns brown or flakes away after decades of weathering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 313.16g with complete fusion crust and polished window. Certificate of authenticity included. No display stand is provided with this listing.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eComplete fusion crust coverage is uncommon in recovered meteorites. Most specimens fracture on impact or weather extensively before collection. This individual retains its entire atmospheric skin while providing interior access through a carefully positioned window, offering both display appeal and scientific visibility without destructive sampling.\u003c\/p\u003e\n\u003cp\u003eThe oriented geometry adds scarcity value. While ordinary chondrites fall frequently, the subset showing clear orientation represents a fraction of recovered material. The 313.16g mass provides substantial presence for display while remaining accessible for private collections. Collectors building representative \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e assemblages will find this specimen delivers both visual impact and pedagogical value for understanding atmospheric entry processes.\u003c\/p\u003e\n\u003cp\u003eRecent recovery date ensures this material entered collections with minimal handling history. For collectors interested in fresh, unweathered specimens from recent Saharan recoveries, this individual offers condition quality rarely seen in older cataloged falls.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44759269310511,"sku":"NWA-XXX-313.16G-INDIVIDUAL-ORIENTED","price":475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/29AF6A87-527B-4E3D-8CF9-35055065DE54.jpg?v=1765576040"},{"product_id":"untitled-dec12_16-51","title":"NWA 17919 Chondrite Meteorite Individual, H6, 488.00g, Mirror Polished Window with Fusion Crust","description":"\u003ch2\u003eProfessional preparation reveals interior structure\u003c\/h2\u003e\u003cp\u003eThis 488.00-gram individual from the NWA 17919 find combines scientific preparation with preserved natural exterior. A mirror polished window cuts through the interior, exposing the internal structure while the remaining surface retains the natural fusion crust formed during atmospheric entry. The exterior displays regmaglypts across the unpolished portions, offering a direct comparison between the meteorite's arrival state and its geological interior.\u003c\/p\u003e\u003cp\u003eThe polished window reveals the equilibrated texture characteristic of H6 chondrites. Chondrules remain visible despite the thermal metamorphism that defines petrologic type 6 classification. Metal grains distribute throughout the matrix, and the polished surface allows direct observation of grain boundaries and mineral assemblages that formed 4.56 billion years ago in the solar nebula.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe mirror polish exposes chondrules that have been partially recrystallized but remain structurally identifiable. Type 6 metamorphism occurred while the parent asteroid was still accreting, heating the material to temperatures between 700 and 950 degrees Celsius. This thermal processing homogenized the olivine and pyroxene compositions while preserving the fundamental chondritic architecture.\u003c\/p\u003e\u003cp\u003eMetal distribution appears as bright reflective grains against the silicate matrix. The fusion crust on unpolished surfaces measures approximately one millimeter thick, showing the glassy texture created when surface material melted during the few seconds of atmospheric passage. Regmaglypts indent the crust where differential ablation carved thumbprint-like depressions into the softened surface.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eH6 chondrites represent material from the ordinary chondrite parent asteroid that experienced significant thermal metamorphism early in solar system history. The H group designation indicates high total iron content (25-31% by mass) with most iron present as metal rather than bound in silicates. This specimen preserves a record of both nebular condensation processes visible in its chondrules and subsequent parent body thermal evolution.\u003c\/p\u003e\u003cp\u003eOrdinary chondrites account for roughly 80% of meteorite falls, making them our most abundant samples of primitive solar system material. The equilibrated texture in type 6 specimens provides insight into thermal conditions within asteroid interiors during the first few million years after solar system formation. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e and their role in understanding planetary formation processes.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17919 is classified in the Meteoritical Bulletin as an H6 ordinary chondrite. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017919\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity with purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the H6 classification indicate?\u003c\/strong\u003e The H indicates high total iron content in the ordinary chondrite classification system. The number 6 represents petrologic type, meaning this material experienced significant thermal metamorphism that equilibrated mineral compositions while the parent asteroid was forming. Type 6 is the highest metamorphic grade that still preserves recognizable chondrules.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 488.00-gram NWA 17919 individual with mirror polished window and certificate of authenticity. No display stand is included unless separately noted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts?\u003c\/strong\u003e Regmaglypts are the thumbprint-like depressions visible on the fusion crust. They form during atmospheric entry when differential ablation carves into the melting surface. Turbulent airflow creates vortices that preferentially remove material from specific areas, leaving the characteristic dimpled texture.\u003c\/p\u003e\u003ch2\u003eDisplay specimen with scientific utility\u003c\/h2\u003e\u003cp\u003eThe 488.00-gram mass provides substantial hand presence. The mirror polished window transforms this individual into a teaching specimen that demonstrates meteorite internal structure while the preserved fusion crust and regmaglypts illustrate atmospheric entry processes. This dual presentation makes the specimen suitable for both display and comparative study.\u003c\/p\u003e\u003cp\u003eH6 chondrites with professional preparation occupy a specific niche for collectors seeking equilibrated material that still retains textural evidence of its chondritic origin. The size allows for detailed examination without magnification, and the mass-to-surface-area ratio delivers visual impact in collection displays. Collectors building comprehensive ordinary chondrite suites will find this specimen represents the high-metamorphic-grade end of the H group sequence. Browse additional specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017919\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17919\u003c\/a\u003e | Classification: H6 Ordinary Chondrite | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44759272521775,"sku":"NWA-17919-488.00G-INDIVIDUAL-MP","price":1460.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7054.jpg?v=1765577950"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-316-40g-complete-fusion-crust","title":"NWA XXX Ordinary Chondrite Meteorite Individual, Unclassified, 316.40g, Complete Fusion Crust, Oriented","description":"\u003ch2\u003eOriented atmospheric entry preserved in fusion crust\u003c\/h2\u003e\n\u003cp\u003eThis 316.40g ordinary chondrite individual displays oriented flight characteristics visible across its complete fusion crust surface. The thermal pattern shows a defined leading edge where atmospheric compression heated the meteoroid to incandescence, creating the glossy black coating that covers the entire specimen. The crust's variation in thickness and texture maps the pressure gradient experienced during deceleration through Earth's atmosphere. Fresh condition indicates minimal terrestrial weathering since the 2024 recovery in Western Sahara.\u003c\/p\u003e\n\u003cp\u003eThe specimen's mass and structural integrity make it suitable for both display and scientific examination. Ordinary chondrites constitute approximately 87% of observed meteorite falls, yet complete fusion crust coverage remains uncommon in recovered specimens. Most finds show partial crust loss from ground impact or post-fall weathering.\u003c\/p\u003e\n\u003ch2\u003eFusion crust formation and preservation\u003c\/h2\u003e\n\u003cp\u003eThe fusion crust formed during the final seconds of atmospheric flight as surface temperatures exceeded 1,500°C. This thermal shell developed through ablation, the continuous removal of heated material as the meteoroid descended. The oriented shape indicates stable flight geometry, with one surface consistently facing the direction of travel. Flow lines and differential thickness across the crust document the aerodynamic forces that shaped this specimen during entry.\u003c\/p\u003e\n\u003cp\u003eFresh fusion crust appears glossy black due to magnetite-rich glass formed from flash-melted chondritic material. This specimen's crust shows no significant caliche coating or desert varnish, suggesting either recent fall or rapid recovery after landing. The arid Western Sahara environment provides excellent preservation conditions for meteorite finds.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites formed in the early solar system approximately 4.56 billion years ago from dust and small particles in the protoplanetary disk. These meteorites preserve primitive materials that accreted before planetary differentiation began. The chondrules, millimeter-scale spherical structures within the matrix, solidified from molten droplets in the solar nebula. Unclassified specimens await detailed analysis to determine their specific group (H, L, or LL) and petrologic type, which indicate parent body composition and thermal history.\u003c\/p\u003e\n\u003cp\u003eMost ordinary chondrites originate from S-type asteroids in the main asteroid belt between Mars and Jupiter. Impact events fragment these parent bodies, ejecting material that eventually intersects Earth's orbit. The complete fusion crust on this specimen provides evidence of its atmospheric passage and validates its extraterrestrial origin. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand the formation and classification of different meteorite types.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is documented as an ordinary chondrite find from Western Sahara in 2024. While not yet fully classified to group and type, its fusion crust and internal characteristics confirm meteoritic origin. The specimen includes a certificate of authenticity. For classification details, search the Meteoritical Bulletin at: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php\" rel=\"noopener\" target=\"_blank\"\u003ewww.lpi.usra.edu\/meteor\/metbull.php\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for this meteorite?\u003c\/strong\u003e Orientation indicates the specimen maintained a stable attitude during atmospheric flight, with one surface consistently facing forward. This stable flight created the asymmetric fusion crust pattern visible on the specimen, with thicker crust on the leading edge where heating was most intense.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 316.40g oriented individual with complete fusion crust and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is complete fusion crust coverage significant?\u003c\/strong\u003e Most meteorite finds show partial crust loss from impact damage or weathering. Complete coverage indicates the specimen survived atmospheric entry, landing, and recovery without fragmentation or surface degradation. This preservation makes the specimen valuable for studying entry heating patterns.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat will classification determine?\u003c\/strong\u003e Future analysis will assign this specimen to H, L, or LL group based on iron content and assign a petrologic type (3-6) based on thermal metamorphism degree. Classification provides specific information about parent body composition and processing history.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collection value\u003c\/h2\u003e\n\u003cp\u003eThe 316.40g mass provides substantial presence for display while remaining manageable for handling and study. Complete fusion crust coverage appeals to collectors seeking specimens that show clear evidence of atmospheric passage. Oriented meteorites demonstrate flight dynamics principles and represent a subset of finds with documented stable entry trajectories.\u003c\/p\u003e\n\u003cp\u003eFresh fusion crust contrasts visually with weathered or fusion crust-free specimens, making this individual immediately identifiable as a meteorite to observers. The 2024 find date means this specimen entered collections during the current era of meteorite documentation and trading. Collectors building comprehensive ordinary chondrite collections value specimens showing varied preservation states and morphologies. Browse our full selection in the \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection or explore \u003ca href=\"\/collections\/budget-friendly-pieces\"\u003eBudget Friendly Pieces\u003c\/a\u003e for accessible specimens across multiple types.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44761658785839,"sku":"NWA-XXX-316.40G-INDIVIDUAL-ORIENTED","price":475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/C4410640-E2B4-4163-AC16-CD2220BE3BD6.jpg?v=1765576166"},{"product_id":"nwa-15468-meteorite-slice-oc-4-melt-breccia-1-of-6-ultra-rare-42-09g","title":"NWA 15468 Ordinary Chondrite Meteorite Slice, OC4 melt breccia, 42.09g, Impact-Molten Matrix","description":"\u003ch2\u003eImpact-molten matrix frozen in time\u003c\/h2\u003e\u003cp\u003eThis 42.09g polished slice captures the violent thermal history of an ordinary chondrite transformed by catastrophic impact. The once-discrete chondritic structure melted and recrystallized into a breccia matrix, binding surviving fragments in what was briefly molten rock. The polished surface reveals this impact-generated mosaic with clarity: angular clasts of unmelted chondritic material suspended in a darker, recrystallized groundmass that cooled rapidly after the collision event.\u003c\/p\u003e\u003cp\u003eNWA 15468 represents one of only six OC-4 melt breccia classifications recorded in the Meteoritical Bulletin. This specimen preserves both the pre-impact chondritic heritage and the transformative shock event in a single cross-section. The slice measures substantial enough to display the textural variation across multiple impact-processed zones, with some areas showing complete melting while adjacent regions retain relict chondritic features.\u003c\/p\u003e\u003ch2\u003eMelt breccia texture and shock features\u003c\/h2\u003e\u003cp\u003eThe polished face exposes the characteristic texture of melt breccia formation: chondritic clasts ranging from submillimeter to several millimeters across, set in a fine-grained matrix that formed from impact-generated melt. The matrix itself shows recrystallization textures consistent with rapid cooling after the impact event. Some clast boundaries remain sharp where fragments survived the thermal pulse intact, while other areas show partial melting and diffuse boundaries where material began to incorporate into the melt phase.\u003c\/p\u003e\u003cp\u003eUnder magnification, the slice reveals shock darkening in portions of the matrix and evidence of localized melting that did not fully homogenize the material. This preservation of both melted and unmelted domains within a single specimen documents the thermal gradient present during the impact event. The polish brings out subtle color variations between the darker melt matrix and lighter clastic components, emphasizing the brecciated nature of this impact-processed material.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eOrdinary chondrites dominate meteorite falls, but specimens that experienced sufficient impact energy to generate melt breccias remain scientifically valuable. The OC-4 designation indicates an ordinary chondrite composition with petrologic type 4 characteristics in the unmelted portions, combined with melt breccia textures from later impact processing. This dual record makes melt breccias important for understanding both the original parent body lithology and the subsequent collision history that generated localized melting without destroying the entire meteorite.\u003c\/p\u003e\u003cp\u003eThe scarcity of classified OC-4 melt breccias reflects the specific conditions required for their formation: impact energy high enough to generate melt, but not so catastrophic as to completely homogenize or destroy the meteorite. NWA 15468 formed in the asteroid belt, where collisions between small bodies generated the shock features and thermal metamorphism now preserved in this slice. For collectors and researchers interested in impact processes, this specimen provides tangible evidence of the energetic environment that shaped early solar system bodies. Learn more about meteorite types and formation at \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 15468 is classified as OC4 melt breccia in the Meteoritical Bulletin. You can verify the classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2015468\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin entry: NWA 15468\u003c\/a\u003e. This specimen includes a certificate of authenticity with full classification details.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does \"melt breccia\" mean?\u003c\/strong\u003e Melt breccia forms when impact energy generates enough heat to partially or completely melt meteorite material, which then cools and solidifies while incorporating fragments of unmelted rock. The result is a mosaic texture of angular clasts suspended in a once-molten matrix, preserving evidence of the impact event that created it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The slice weighs 42.09g and ships with a certificate of authenticity documenting its Meteoritical Bulletin classification. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy are only six OC-4 melt breccias classified?\u003c\/strong\u003e The specific combination of ordinary chondrite composition, petrologic type 4 characteristics, and melt breccia texture occurs rarely in recovered meteorites. Most ordinary chondrites either lack significant impact processing or experienced different shock conditions that produced other textures. This classification scarcity reflects the narrow parameter window for OC-4 melt breccia formation and recovery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does this differ from a standard ordinary chondrite?\u003c\/strong\u003e A typical ordinary chondrite preserves its original chondrule structure largely intact. This melt breccia experienced an impact event energetic enough to melt portions of the material, creating a recrystallized matrix that binds surviving chondritic fragments. The specimen thus records both the original chondritic composition and a later collision history.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eThe classification scarcity of OC-4 melt breccias makes NWA 15468 a documented rarity in the meteorite market. With only six such classifications recorded, acquiring a specimen of this type requires patience and availability. This 42.09g slice provides display-worthy size with clear textural features visible to the unaided eye, while remaining accessible compared to other rare classifications.\u003c\/p\u003e\u003cp\u003eThe polished finish maximizes the visual contrast between melt matrix and clastic components, making the impact-processing history immediately apparent. For collectors building representative collections of chondrite subtypes, this specimen fills a category that sees minimal market availability. The slice format offers stable display geometry and exposes the internal texture completely, unlike partial slices or exterior-only individuals. Explore additional chondrite varieties at \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e or view other compositionally distinct specimens at \u003ca href=\"\/collections\/ordinary-chondrite\"\u003eOrdinary Chondrites\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2015468\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 15468\u003c\/a\u003e | Classification: OC4 melt breccia | Find, Mali, 2022\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44762257588271,"sku":"NWA-15468-42.09G-SLICE","price":675.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-15468-oc-4-melt-breccia.png?v=1766199396"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-w-fresh-fusion-crust-orientation-regmaglypts-1668-24g","title":"NWA XXX Unclassified Ordinary Chondrite Individual, 1668.24g, Oriented Flight with Fresh Fusion Crust","description":"\u003ch2\u003eOriented atmospheric entry preserved in stone\u003c\/h2\u003e\n\u003cp\u003eThis 1668.24-gram ordinary chondrite individual displays textbook evidence of stable atmospheric flight. The specimen retains complete fusion crust coverage, a glossy black shell that formed as the meteorite's leading surface melted during hypersonic entry. The oriented shape and asymmetric ablation pattern indicate the stone maintained a consistent orientation as it decelerated through Earth's atmosphere, a relatively uncommon preservation state that makes this specimen scientifically and visually distinctive.\u003c\/p\u003e\n\u003cp\u003eRegmaglypts cover the fusion-crusted surface in overlapping patterns. These thumbprint-like depressions formed as turbulent air currents sculpted the molten surface layer during descent. The depth and clarity of these features reflect the intensity of atmospheric heating and the stone's composition. Fresh fusion crust like this degrades quickly once a meteorite reaches the ground, making the preservation state of this 2024 find particularly notable.\u003c\/p\u003e\n\u003ch2\u003eSurface features and ablation characteristics\u003c\/h2\u003e\n\u003cp\u003eThe fusion crust shows no weathering, oxidation, or terrestrial contamination. Its uniform black coloration and glassy texture indicate minimal time between fall and recovery. The oriented shape is evident in the specimen's asymmetric profile, one face shows pronounced frontal ablation, while the trailing surfaces preserve less intense heating effects. This differential ablation creates the classic cone or shield shape associated with oriented meteorites.\u003c\/p\u003e\n\u003cp\u003eRegmaglypt distribution follows the airflow patterns that developed during atmospheric passage. Deeper impressions appear on the leading surface where heating was most intense, while shallower features mark the transition zones. The fusion crust thickness varies across the specimen, another indicator of oriented flight. No breakage, fragmentation, or impact damage is present, suggesting the stone survived atmospheric entry and ground impact intact.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites represent the most common meteorite type recovered on Earth, accounting for roughly 80% of all documented falls and finds. These stones formed in the early solar system from dust and small particles that accreted into larger parent bodies. The presence of chondrules, millimeter-scale spherical structures visible in cross-section, defines this meteorite class and provides direct samples of the solar nebula's earliest solid materials.\u003c\/p\u003e\n\u003cp\u003eThis specimen awaits formal classification, which will determine its specific subgroup (H, L, or LL) based on iron content and olivine composition. The unclassified status offers research value for institutions or collectors interested in contributing petrographic and chemical data to the Meteoritical Bulletin. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand the classification process and what distinguishes chondrite subgroups.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is confirmed as a meteorite based on fusion crust, regmaglypt morphology, and material characteristics consistent with ordinary chondrites. Formal classification is pending submission to the Meteoritical Society. A certificate of authenticity documenting provenance, recovery location, and physical characteristics is included with purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for a meteorite?\u003c\/strong\u003e Oriented flight occurs when a meteorite maintains a stable orientation during atmospheric entry rather than tumbling. This creates asymmetric ablation patterns, with more intense melting on the leading face. The resulting shape and regmaglypt distribution provide evidence of the stone's flight dynamics and heating history.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts and how do they form?\u003c\/strong\u003e Regmaglypts are thumbprint-like depressions that form when turbulent air currents scour the molten fusion crust during atmospheric passage. Their depth, distribution, and morphology depend on entry velocity, composition, and flight orientation. Well-developed regmaglypts like those on this specimen indicate intense atmospheric interaction and are highly valued by collectors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 1668.24-gram oriented chondrite individual and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this specimen unclassified?\u003c\/strong\u003e Classification requires thin-section petrographic analysis and elemental composition measurements submitted to the Meteoritical Society's Nomenclature Committee. Many Northwest Africa finds await formal classification due to the volume of material recovered and limited laboratory capacity. The meteorite's identity as an ordinary chondrite is confirmed by its physical and structural characteristics.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collector significance\u003c\/h2\u003e\n\u003cp\u003eOriented meteorites with intact fusion crust represent a small fraction of recovered specimens. Most stones tumble during atmospheric entry, creating uniform fusion crust coverage without directional ablation features. This specimen's size, preservation state, and clear flight orientation make it suitable for educational displays, institutional collections, or private collections focused on atmospheric entry phenomena.\u003c\/p\u003e\n\u003cp\u003eThe 1668.24-gram mass provides substantial physical presence without requiring specialized display infrastructure. The complete fusion crust coverage and regmaglypt development are visible from multiple angles, making this an effective teaching specimen for explaining atmospheric entry processes. Fresh fusion crust degrades over time through terrestrial weathering, making recent finds like this 2024 recovery particularly desirable for collectors prioritizing surface preservation. Explore our full \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection to compare preservation states and morphological diversity across different finds.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44806986432559,"sku":"NWA-XXX-1668.24G-INDIVIDUAL-ORIENTED","price":1668.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7265.heic?v=1766705170"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-oriented-complete-stone-with-fusion-crust-869g","title":"NWA XXX Ordinary Chondrite Meteorite Individual, Unclassified, 869.00g, Oriented with Regmaglypts","description":"\u003ch2\u003eFlight-oriented complete stone with ablation features\u003c\/h2\u003e\n\u003cp\u003eThis 869.00g complete individual preserves the exact orientation it held during atmospheric entry. The leading surface shows a smooth, aerodynamically sculpted fusion crust, while the trailing surface displays the characteristic geometry of a meteorite that maintained stable flight. Deep regmaglypts cover the exterior, thumbprint-like depressions formed as atmospheric pressure sculpted the molten surface during ablation. A single cut window exposes the internal chondritic texture without compromising the intact outer morphology that defines oriented specimens.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust displays minimal weathering and retains a glossy black finish across most surfaces. This preservation indicates a recent recovery from the Algerian desert in 2024. The regmaglypts vary in depth and diameter across the stone, reflecting localized variations in ablation intensity as the meteorite decelerated through successive atmospheric layers.\u003c\/p\u003e\n\u003ch2\u003eRegmaglypts and fusion crust formation\u003c\/h2\u003e\n\u003cp\u003eRegmaglypts form when atmospheric pressure creates vortices in the molten fusion crust during hypersonic flight. These rotating gas pockets scoop material away faster than surrounding areas, carving distinct depressions. The pattern on this specimen indicates stable orientation, the regmaglypts align with the direction of atmospheric flow across the leading surface. Turbulent flow around the trailing edge produced smaller, more irregular features.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust itself formed as frictional heating raised surface temperatures above 1600°C, melting the outermost layer. Rapid cooling as the meteorite decelerated below supersonic speeds froze this glassy coating in place. The preserved crust thickness varies from approximately 0.5mm on protected surfaces to near-ablation on the apex of the leading face, where heating reached maximum intensity.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites represent the most common meteorite type recovered on Earth, comprising approximately 80% of observed falls. They formed in the early solar nebula 4.56 billion years ago as dust and small particles accreted into larger bodies. The cut window on this specimen reveals chondrules, millimeter-scale spherical structures that condensed directly from the solar nebula and preserve a record of conditions in the protoplanetary disk. These chondrites derive from parent asteroids that never underwent planetary differentiation, making them primitive samples of solar system formation processes.\u003c\/p\u003e\n\u003cp\u003eUnclassified specimens await petrographic analysis to determine their specific chemical group (H, L, or LL) and petrologic type. This classification requires thin-section microscopy and compositional analysis beyond initial field identification. For collectors and researchers interested in the formation and evolution of meteorites, visit \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is confirmed as an ordinary chondrite based on structural and compositional characteristics. It awaits formal classification and submission to the Meteoritical Bulletin, which is standard for recently recovered Northwest Africa finds. A certificate of authenticity documenting its meteoritic origin is included with purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for a meteorite?\u003c\/strong\u003e Oriented meteorites maintained a stable orientation during atmospheric flight rather than tumbling randomly. This stable flight produces asymmetric heating, the leading surface develops a smooth, aerodynamic profile while the trailing surface remains more angular. The result is a directional shape that records the meteorite's trajectory through the atmosphere.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts?\u003c\/strong\u003e Regmaglypts are the thumbprint-like depressions visible across the fusion crust. They form when differential ablation rates create local depressions in the molten surface. The depth and distribution pattern of regmaglypts provides information about atmospheric flight dynamics and orientation stability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 869.00g oriented individual exactly as photographed, plus a certificate of authenticity confirming its meteoritic origin and provenance details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are unclassified specimens valuable?\u003c\/strong\u003e Unclassified specimens represent recent finds that have not yet undergone formal laboratory analysis and submission to the Meteoritical Bulletin. While they are confirmed meteorites, they await detailed classification work. Some collectors value the opportunity to own specimens before formal classification, while others appreciate having material available for potential future research or donation to institutions.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collector significance\u003c\/h2\u003e\n\u003cp\u003eAt 869.00g, this specimen provides substantial visual presence while remaining manageable for cabinet display. The preserved orientation geometry makes it a teaching piece, the contrast between leading and trailing surfaces illustrates atmospheric flight dynamics in a way that tumbled stones cannot. The cut window adds scientific value by exposing internal structure for examination without sacrificing the exterior features that define oriented meteorites.\u003c\/p\u003e\n\u003cp\u003eFresh fusion crust with minimal terrestrial weathering indicates excellent preservation. The glossy surface finish and well-defined regmaglypts represent optimal aesthetic condition for this specimen type. Oriented ordinary chondrites with this degree of morphological preservation appeal to collectors focused on atmospheric phenomena and entry dynamics. Browse additional specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44861473325103,"sku":"NWA-XXX-869G-INDIVIDUAL-ORIENTED","price":800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7600.heic?v=1768252125"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-oriented-complete-stone-with-fusion-crust-1091-71g","title":"NWA XXX Ordinary Chondrite Meteorite Individual, Unclassified, 1091.71g, Oriented with Regmaglypts","description":"\u003ch2\u003eOriented atmospheric flight preserved in stone\u003c\/h2\u003e\n\u003cp\u003eThis 1091.71g complete individual preserves the exact orientation it maintained during atmospheric entry. The leading surface displays a smooth, ablated profile where atmospheric friction was most intense, while the trailing surface retains a rougher texture with pronounced regmaglypts, thumbprint-like depressions formed by turbulent airflow during descent. The aerodynamic shaping documents a stable, controlled fall through the atmosphere rather than the tumbling flight pattern that produces unoriented stones.\u003c\/p\u003e\n\u003cp\u003eFresh, glossy fusion crust coats the exterior with minimal terrestrial weathering, indicating recent recovery from the Sahara. A cut window on one side exposes the internal chondritic structure, revealing the primitive aggregation of chondrules and mineral grains that define ordinary chondrites. This combination of preserved exterior features and accessible interior makes the specimen both scientifically informative and visually compelling.\u003c\/p\u003e\n\u003ch2\u003eRegmaglypts and fusion crust formation\u003c\/h2\u003e\n\u003cp\u003eThe regmaglypts across the trailing surface formed as differential ablation sculpted the stone during its hypersonic descent. Areas of slightly lower density or different mineral composition ablated faster, creating the characteristic thumbprint depressions. The depth and definition of these features indicate the specimen experienced significant heating without complete ablation, a balance that requires specific entry angles and velocities.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust itself represents a glassy rind formed when surface material melted and immediately resolidified in the frigid upper atmosphere. The glossy black coating is thickest on the leading surface where heating was most intense, thinning toward the trailing edge. Small flow lines visible in the crust record the direction of airflow, providing additional evidence of the stone's orientation during flight.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites represent the most common meteorite type, accounting for approximately 80% of all observed falls. These stones formed in the early solar nebula 4.567 billion years ago, aggregating from dust, chondrules, and other primitive components before the planets finished forming. Their parent bodies, likely asteroids in the main belt between Mars and Jupiter, preserve conditions from the solar system's first few million years. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how these primitive stones inform planetary science.\u003c\/p\u003e\n\u003cp\u003eThe unclassified status means this specimen has not yet undergone formal petrologic and chemical analysis to determine its specific H, L, or LL group assignment and petrologic type. Future classification work may provide additional scientific value, particularly if it represents an undersampled group or fall event.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is sold as an unclassified ordinary chondrite based on its chondritic texture, fusion crust, and field characteristics consistent with meteoritic origin. While not formally classified in the Meteoritical Bulletin, it includes a certificate of authenticity from Treasure Coast Meteorite Co. documenting its meteoritic nature, weight, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does oriented mean for a meteorite?\u003c\/strong\u003e An oriented meteorite maintained a stable orientation during atmospheric entry rather than tumbling. This produces distinct leading and trailing surfaces with different ablation patterns, regmaglypts, and fusion crust characteristics. Oriented specimens are scientifically valuable because they preserve flight dynamics data and are highly sought by collectors for their aerodynamic shaping.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this specimen unclassified?\u003c\/strong\u003e Formal classification requires thin section preparation, petrographic analysis, and often chemical or isotopic testing performed by a qualified meteoriticist. Many Northwest Africa finds remain unclassified due to the volume of material recovered and limited analytical resources. Unclassified specimens are sold based on field characteristics and texture consistent with known meteorite types.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 1091.71g and includes a certificate of authenticity. No display stand is included unless separately noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this meteorite be formally classified in the future?\u003c\/strong\u003e Yes. The cut window provides access to fresh interior material suitable for thin section preparation. Owners may submit samples to a qualified laboratory for formal classification, though this requires destructive sampling and laboratory fees.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collecting value\u003c\/h2\u003e\n\u003cp\u003eOriented meteorites comprise less than 2% of witnessed falls and an even smaller fraction of finds, making specimens with clear flight orientation highly collectible. This individual's size, over one kilogram, provides substantial visual impact while the regmaglypts, fusion crust, and aerodynamic profile tell a clear story of atmospheric passage. The cut window adds educational value without compromising the specimen's oriented character.\u003c\/p\u003e\n\u003cp\u003eFresh fusion crust and minimal weathering enhance both scientific and aesthetic value. The glossy black coating contrasts sharply with the lighter interior visible through the window, creating visual interest from multiple viewing angles. Collectors seeking \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e or \u003ca href=\"\/collections\/budget-friendly-pieces\"\u003eBudget Friendly Pieces\u003c\/a\u003e will find this specimen offers significant mass and compelling features at accessible pricing for a kilogram-class oriented stone.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44861487382575,"sku":"NWA-XXX-1091.71G-INDIVIDUAL-ORIENTED","price":990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-xxx-unclassified-ordinary-chondrite-oriented-stone-hero-1091g.heic?v=1779461563"},{"product_id":"nwa-17916-co3-carbonaceous-chondrite-slice-13-67g","title":"NWA 17916 CO3 Carbonaceous Chondrite Meteorite Slice, 13.67g, Dense Chondrule Population","description":"\u003ch2\u003eChondrule density in primitive matrix\u003c\/h2\u003e\n\u003cp\u003eThis 13.67-gram slice reveals the characteristic structure of CO3 carbonaceous chondrites: small, tightly packed chondrules suspended in a fine-grained matrix. The slice format provides direct visual access to dozens of individual chondrules, each representing a discrete melting event in the solar nebula. The dark matrix material contains the same volatile-rich compounds and presolar grains that make CO chondrites essential to understanding early solar system chemistry.\u003c\/p\u003e\n\u003cp\u003eThe slice measures substantial enough for detailed examination while remaining accessible for collectors building primitive meteorite reference collections. Surface preparation reveals chondrule boundaries and matrix texture without obscuring the specimen's natural composition.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eCO chondrites derive their designation from the type specimen that fell in Ornans, France in 1868. This group exhibits the smallest average chondrule size among ordinary chondrites, typically 150 micrometers in diameter, creating the dense packing visible throughout this slice. The Type 3 petrologic grade confirms minimal thermal alteration since accretion, meaning the minerals and organic compounds present retain their original nebular states.\u003c\/p\u003e\n\u003cp\u003eRefractory calcium-aluminum-rich inclusions (CAIs) appear as lighter-toned irregular shapes within the matrix. These inclusions formed at temperatures exceeding 1,300 degrees Celsius in the innermost regions of the protoplanetary disk before being transported outward and incorporated into the parent asteroid. The matrix itself contains phyllosilicates, magnetite, and organic compounds that formed at much lower temperatures, demonstrating the heterogeneous mixing that characterized the early solar nebula.\u003c\/p\u003e\n\u003ch2\u003eDiscovery and provenance\u003c\/h2\u003e\n\u003cp\u003eNWA 17916 was recovered in 2025 as two stones totaling 742.17 grams in the Tindouf region of Algeria. The specimens display brown coloration with desert varnished fusion crust, consistent with extended terrestrial residence in arid conditions while remaining fresh enough to preserve primitive carbonaceous chondrite features.\u003c\/p\u003e\n\u003cp\u003eClassification was performed by Jose Garcia of ADARA (Petrography and Curation of Astromaterials, Canary Islands, Spain). The type specimen of 20.35 grams is held by MUNA (Museo de la Naturaleza y Arqueologia, Tenerife, Spain), with three thin sections retained at ADARA. The main mass is held by Brian McDonald of Treasure Coast Meteorite Co. The classification was approved 14 September 2025 and published in Meteoritical Bulletin 114.\u003c\/p\u003e\n\u003cp\u003ePetrographic analysis confirmed the CO3 designation through mineral composition, magnetic susceptibility (4.39), and chondrule diameter measurements. Mean chondrule diameter is 247 plus or minus 116 micrometers across 36 measurements, with CAIs averaging 332 plus or minus 102 micrometers. Olivine compositions of Fa 18.2 and low-calcium pyroxene of Fs 4.7 fall within the established CO3 range, and weathering is graded low.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eCO chondrites formed in the outer asteroid belt approximately 4.567 billion years ago, capturing a mixture of high-temperature condensates and low-temperature ices and organics. The parent body accreted quickly enough to avoid significant heating from radioactive decay, preserving the primitive composition. This makes CO3 specimens like NWA 17916 critical for understanding the chemical and isotopic inventory available during planet formation.\u003c\/p\u003e\n\u003cp\u003eStudies of CO chondrites have identified presolar silicon carbide and graphite grains, literal stardust older than the solar system itself, embedded in the matrix. The organic compounds include amino acids and other prebiotic molecules, supporting the hypothesis that carbonaceous chondrites delivered the chemical building blocks of life to the early Earth.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17916 is classified as CO3 in the Meteoritical Bulletin. The official classification record is publicly available through the Meteoritical Society database.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes CO chondrites special?\u003c\/strong\u003e CO chondrites preserve the most primitive material from the early solar system, including presolar grains, CAIs, and organic compounds. Their small, tightly packed chondrules and abundant inclusions make them especially valued by researchers and collectors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow rare is this classification?\u003c\/strong\u003e CO chondrites represent approximately 1 percent of all observed meteorite falls, making them considerably less common than ordinary chondrites in both research collections and the private market.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow was the slice prepared?\u003c\/strong\u003e The specimen was cut using a precision diamond saw and the cut surface was polished to reveal the internal chondrule and matrix structure. This preparation allows direct visual examination without obscuring the primitive composition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs shipping insured?\u003c\/strong\u003e Yes. All specimens ship fully insured with tracking. Treasure Coast Meteorite Co. handles each piece with care appropriate to its scientific and collector value.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eCO chondrites represent approximately 1 percent of observed meteorite falls, making them considerably less common than ordinary chondrites in collections. The combination of small chondrule size, abundant CAIs, and preserved organics makes them particularly valued by institutions and private collectors focused on early solar system materials. This 13.67-gram slice provides sufficient size for both display and comparative study without the investment required for larger specimens.\u003c\/p\u003e\n\u003cp\u003eThe piece displays well from either side, allowing collectors to showcase the chondrule population regardless of orientation. The slice format offers more accessible pricing than complete individuals while preserving the full scientific characteristics that define the group. Explore additional primitive specimens in our \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85532\" target=\"_blank\"\u003eNorthwest Africa 17916\u003c\/a\u003e. 742.17 g | MB 114 (2025).\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44902152372271,"sku":"NWA-17916-13.67G-SLICE","price":205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17916-co3-carbonaceous-chondrite-meteorite-13.67g-cut-face.heic?v=1779457471"},{"product_id":"nwa-17296-l5-ordinary-chondrite-oriented-complete-stone-with-fresh-fusion-crust-1472g","title":"NWA 17296 Ordinary Chondrite Meteorite Individual, L5, 1472.00g, Oriented with Regmaglypts","description":"\u003ch2\u003eFlight orientation preserved in stone\u003c\/h2\u003e\n\u003cp\u003eThis 1472.00g complete individual of NWA 17296 preserves the exact attitude the meteorite held during atmospheric entry. The leading surface shows concentrated ablation sculpting, while the trailing surface remains relatively protected. Pronounced regmaglypts cover the fusion-crusted exterior, each thumbprint-shaped depression marking turbulent airflow during hypersonic flight. A cut window exposes the L5 chondritic interior without compromising the aerodynamic shaping that makes oriented specimens scientifically valuable.\u003c\/p\u003e\n\u003cp\u003eFresh fusion crust with minimal weathering indicates recent recovery. Contraction cracks pattern the surface where the molten outer layer cooled rapidly in the lower atmosphere. At nearly 1.5 kilograms, this specimen balances substantial size with complete preservation of atmospheric modification features.\u003c\/p\u003e\n\u003ch2\u003eRegmaglypts and fusion crust features\u003c\/h2\u003e\n\u003cp\u003eThe regmaglypts on this specimen show the characteristic depth and smoothness of ablation sculpting. These depressions formed as differential heating created localized vortices in the superheated plasma surrounding the meteorite. The fusion crust itself remains glossy black where protected, with the distinctive contraction crack network resulting from thermal stress as the exterior solidified while still cooling.\u003c\/p\u003e\n\u003cp\u003eThe cut window reveals the internal chondritic texture typical of L5 classification: well-defined chondrules set in a recrystallized matrix with minimal metal content. This controlled exposure allows examination of the interior structure while maintaining the complete oriented form that collectors seek.\u003c\/p\u003e\n\u003ch2\u003eDiscovery and provenance\u003c\/h2\u003e\n\u003cp\u003eNWA 17296 was recovered in 2023 in Northwest Africa and purchased that June from a meteorite dealer. The total known weight is 1495 grams from a single stone, and the 1472.00g specimen offered here represents nearly the complete recovered mass.\u003c\/p\u003e\n\u003cp\u003eClassification was carried out by Jose Garcia at ADARA Petrography and Curation of Astromaterials in the Canary Islands, Spain, who performed the petrographic analysis and geochemistry. The stone was confirmed as an L5 ordinary chondrite with shock stage S2 and weathering grade W1. Olivine composition measured Fa 22.9 and pyroxene measured Fs 21.3, consistent with the L group and type 5 thermal metamorphic grade. The type specimen of 20 grams is held at the Museo de la Naturaleza y Arqueologia in Tenerife, with an additional 7 grams and two thin sections retained at ADARA. The main mass is held by Brian McDonald. NWA 17296 was officially approved in Meteoritical Bulletin 114 on 1 June 2025.\u003c\/p\u003e\n\u003ch2\u003eL-group chondrites and parent body formation\u003c\/h2\u003e\n\u003cp\u003eL ordinary chondrites represent material from an asteroid belt parent body that experienced thermal metamorphism but not melting. The L designation indicates low total iron content compared to H and LL groups, while the type 5 classification confirms significant thermal alteration that recrystallized the matrix while preserving recognizable chondrules. These specimens formed approximately 4.56 billion years ago in the early solar nebula.\u003c\/p\u003e\n\u003cp\u003eOrdinary chondrites constitute roughly 80% of observed meteorite falls, yet oriented individuals with preserved regmaglypts and fresh fusion crust remain uncommon in collections. Learn more about chondrite classification and structure at \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17296 is classified as an L5 ordinary chondrite in the Meteoritical Bulletin. View the entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85122\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17296\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes a meteorite \"oriented\"?\u003c\/strong\u003e Oriented meteorites maintained stable flight orientation during atmospheric entry, resulting in distinct leading and trailing surfaces. The leading surface shows pronounced ablation and regmaglypt formation, while the trailing surface remains relatively smooth. This preservation of flight dynamics makes oriented specimens scientifically and aesthetically significant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts?\u003c\/strong\u003e Regmaglypts are the thumbprint-like depressions covering this specimen's surface. They form when turbulent plasma flow creates differential ablation during atmospheric entry. Each depression represents a zone where local vortices increased heating and material removal. Fresh regmaglypts like these indicate minimal terrestrial weathering since the fall.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the complete 1472.00g oriented individual with cut window and a certificate of authenticity. The specimen displays stably on its natural base.\u003c\/p\u003e\n\u003ch2\u003eDisplay potential and collector value\u003c\/h2\u003e\n\u003cp\u003eOriented meteorites occupy a distinct category in collecting because they document atmospheric processes directly. This specimen's size allows clear observation of regmaglypt patterns and fusion crust features without magnification. The aerodynamic shaping tells the descent story visually, while the cut window provides scientific access to the interior without sectioning the complete form.\u003c\/p\u003e\n\u003cp\u003eThe combination of fresh fusion crust, well-developed regmaglypts, substantial mass, and stable orientation makes this specimen suitable for both display and study. NWA 17296 was classified in 2023, adding a documented recent find to your collection. Browse additional oriented specimens and complete individuals in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85122\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17296\u003c\/a\u003e | Classification: L5 Ordinary Chondrite | Find, Northwest Africa, 2023\u003c\/p\u003e\n","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44920911495215,"sku":"NWA-17296-1472G-INDIVIDUAL-ORIENTED","price":1900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17296-l5-ordinary-chondrite-1472g-display-oriented-front.heic?v=1779417849"},{"product_id":"nwa-17298-ordinary-chondrite-end-cut-with-partial-fusion-crust-209-51g","title":"NWA 17298 Ordinary Chondrite Meteorite End Cut, L6, 209.51g, Partial Fusion Crust","description":"\u003ch2\u003eEnd cut exposing interior structure\u003c\/h2\u003e\n\u003cp\u003eThis 209.51g end cut from NWA 17298 presents a cross-sectional view through an L6 ordinary chondrite, with one face polished to reveal densely packed chondrules and the opposite surface retaining dark fusion crust. The cut exposes the recrystallized interior texture characteristic of petrologic type 6 material, where chondrule boundaries remain visible but have been metamorphically modified by prolonged heating within the parent asteroid. Thick shock melt veins traverse the cut surface, documenting impact events that fractured and partially melted this material during collisions in the asteroid belt.\u003c\/p\u003e\n\u003cp\u003eThe preserved fusion crust provides direct evidence of atmospheric entry, forming as surface material ablated and melted during deceleration through Earth's atmosphere. End cuts like this specimen serve dual purposes in collections: the polished window permits examination of internal composition and texture, while the natural exterior documents the meteorite's passage from space to ground.\u003c\/p\u003e\n\u003ch2\u003eInterior texture and shock features\u003c\/h2\u003e\n\u003cp\u003eThe polished cut face reveals the recrystallized matrix and modified chondrules typical of type 6 ordinary chondrites, which experienced temperatures between 700-950°C during metamorphism on the parent body. Chondrule outlines persist despite recrystallization, appearing as slightly darker or lighter regions within the equilibrated matrix. Dark shock melt veins cut through the interior, representing localized melting along fracture planes during high-velocity impacts. These veins contrast sharply against the lighter chondritic background, creating visual structure across the cut surface.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust on the exterior preserves the vesicular, glassy texture formed during atmospheric ablation. This black coating adheres to the original surface contours of the meteorite fragment, showing where material vaporized under extreme frictional heating during entry.\u003c\/p\u003e\n\u003ch2\u003eDiscovery and provenance\u003c\/h2\u003e\u003cp\u003eNWA 17298 was found in 2023 in Morocco and purchased by a meteorite dealer in Northwest Africa. The total known weight of the find is 3.09 kilograms across recovered material. It was classified as an L6 ordinary chondrite and accepted in Meteoritical Bulletin 114. The specimen on offer here is a 209.51g end cut representing a significant portion of the recovered mass.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eL6 chondrites represent the most thermally metamorphosed members of the low-iron ordinary chondrite group, having resided deep within their parent asteroid where radiogenic heating drove mineral equilibration and textural modification. Despite this thermal processing, these meteorites preserve the fundamental chondrule structures that formed 4.567 billion years ago in the solar nebula, making them direct samples of planet-building materials. The L chondrites likely originate from a single parent body that experienced a major disruption approximately 470 million years ago, producing a shower of fragments that continues to supply meteorites to Earth today. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how classification systems distinguish between chondrite groups and petrologic types.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17298 is classified as an L6 ordinary chondrite in the Meteoritical Bulletin Database. View the official entry here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84414\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17298\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does L6 classification mean?\u003c\/strong\u003e The \"L\" designates low total iron content (19-22% by mass) within the ordinary chondrite group, while \"6\" indicates the highest degree of thermal metamorphism, where minerals have equilibrated and chondrule boundaries have become indistinct but still visible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 209.51g meteorite end cut and certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are shock melt veins?\u003c\/strong\u003e These dark features form when impact energy locally melts meteorite material along fracture planes. The melt cools rapidly to form glassy or fine-crystalline veins that record the violent collision history of the parent asteroid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does this specimen preserve fusion crust?\u003c\/strong\u003e End cuts retain fusion crust on exterior surfaces that were not removed during sectioning. This allows simultaneous study of both the atmospheric entry ablation crust and the interior structure exposed by the cut.\u003c\/p\u003e\n\u003ch2\u003eDisplay and study specimen\u003c\/h2\u003e\n\u003cp\u003eAt 209.51g, this end cut provides substantial mass for display while maintaining portability and ease of handling. The contrast between polished interior and crusted exterior creates visual interest, with shock veins adding linear structure to the composition. Collectors seeking specimens that illustrate both internal chondritic architecture and external fusion features will find this format particularly effective. The size permits close examination of chondrule distributions and shock textures without magnification, though loupe or microscope inspection reveals additional fine-scale details.\u003c\/p\u003e\n\u003cp\u003eL6 chondrites remain scientifically significant despite their relatively common classification, as they preserve records of early solar system processes, parent body thermal history, and impact modification. This specimen documents all three aspects in a single hand sample. Browse additional examples in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84414\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17298\u003c\/a\u003e | Classification: L6 | Find, Morocco, 2023\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44922991378479,"sku":"NWA-17298-209.51G-ENDCUT","price":420.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17298-l6-ordinary-chondrite-209-51g-polished-face-shock-veins.heic?v=1780191335"},{"product_id":"murchison-cm2-carbonaceous-chondrite-polished-slice-2-184g","title":"Murchison CM2 Carbonaceous Chondrite Meteorite Slice, 2.18g, Polished, Organic-Rich Matrix","description":"\u003ch2\u003ePolished slice from the most scientifically significant carbonaceous chondrite\u003c\/h2\u003e\n\u003cp\u003eThis 2.18g polished slice of Murchison reveals the dark, fine-grained matrix characteristic of CM2 carbonaceous chondrites. The polish brings out subtle variations in texture where embedded chondrules meet the organic-rich groundmass. Murchison fell in Victoria, Australia on September 28, 1969, fragmenting over the town and scattering over 100 kilograms of material that scientists continue to study five decades later.\u003c\/p\u003e\n\u003cp\u003eThe slice shows the heterogeneous interior structure typical of CM chondrites: spherical chondrules suspended in a carbon-bearing matrix that formed before Earth existed. This specimen displays visible chondrules against the darker matrix, offering a direct view of materials that aggregated in the outer solar nebula 4.6 billion years ago.\u003c\/p\u003e\n\u003ch2\u003eMatrix composition and chondrule structure\u003c\/h2\u003e\n\u003cp\u003eCM2 chondrites contain a matrix dominated by phyllosilicates, hydrated minerals that formed when liquid water altered the original rock in the parent asteroid. This aqueous alteration occurred early in solar system history, making Murchison a record of water-rock interactions that predate Earth's formation. The matrix comprises approximately 70% of the meteorite's volume, with embedded chondrules ranging from submillimeter to several millimeters in diameter.\u003c\/p\u003e\n\u003cp\u003eThe chondrules visible in this slice formed as molten droplets in the solar nebula, cooling rapidly to preserve igneous textures. Their presence alongside hydrated minerals demonstrates that Murchison's parent body experienced both high-temperature nebular processes and later aqueous alteration. The polish enhances the contrast between the darker matrix and lighter chondrule materials.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eMurchison originated in the outer asteroid belt, where temperatures remained low enough for volatile compounds to condense and persist. The CM2 classification indicates moderate aqueous alteration, less altered than CM1 meteorites but more altered than CM3. This intermediate state preserves both presolar grains and organic molecules while showing clear evidence of water activity.\u003c\/p\u003e\n\u003cp\u003eScientists have identified over 70 amino acids in Murchison, most of which do not occur in terrestrial biology. The meteorite also contains presolar silicon carbide and diamond grains that formed in other stellar systems before our sun existed. These discoveries established carbonaceous chondrites as carriers of organic molecules to early Earth. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e explores how different meteorite types formed and what they reveal about solar system history.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Murchison is classified as CM2 in the Meteoritical Bulletin. Search the database: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=16875\" rel=\"noopener\" target=\"_blank\"\u003eMurchison\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does CM2 classification mean?\u003c\/strong\u003e CM designates the Mighei chemical group of carbonaceous chondrites, characterized by abundant phyllosilicates and organic matter. The number 2 indicates the petrologic type, representing moderate aqueous alteration. CM2 chondrites experienced enough water activity to alter primary minerals but retained distinct chondrules and presolar components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 2.18g polished Murchison slice and a certificate of authenticity. No display stand is included with this specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is Murchison considered scientifically important?\u003c\/strong\u003e Murchison is the most extensively studied carbonaceous chondrite because of its large recovered mass, fresh condition at time of fall, and exceptional preservation of organic compounds. It has been the subject of thousands of research papers across disciplines from cosmochemistry to astrobiology, contributing fundamental data about solar system formation and the delivery of organic molecules to planetary surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I care for a carbonaceous chondrite?\u003c\/strong\u003e Store Murchison in a dry environment. The meteorite contains hygroscopic minerals that can absorb atmospheric moisture. Avoid handling the specimen directly; oils from skin can affect the surface. Keep the specimen in its protective container when not displayed.\u003c\/p\u003e\n\u003ch2\u003eAcquisition opportunity for astrobiology research material\u003c\/h2\u003e\n\u003cp\u003eMurchison occupies a singular position in meteorite collections because its scientific importance extends beyond meteoritics into astrobiology, organic geochemistry, and stellar evolution. The 1969 fall occurred at an ideal time, researchers could apply new analytical techniques to fresh material, establishing Murchison as the reference standard for carbonaceous chondrite studies. This 2.18g slice provides access to the same material that laboratories worldwide use for cutting-edge research.\u003c\/p\u003e\n\u003cp\u003eThe specimen's polished surface allows direct observation of features that define CM2 chondrites: the dark matrix resulting from fine-grained phyllosilicates, embedded chondrules preserving igneous textures, and the overall texture that formed through parent body processes. For collectors building representative suites of meteorite types, Murchison is the essential carbonaceous chondrite. \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e includes other specimens from this scientifically rich class of meteorites.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=16875\" rel=\"noopener\" target=\"_blank\"\u003eMurchison\u003c\/a\u003e | Classification: CM2 | Fall, Australia, 1969\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44924940943407,"sku":"MURCHISON-2.184G-SLICE","price":2184.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/murchison-cm2-carbonaceous-chondrite-full-slice-2-184g.heic?v=1769829988"},{"product_id":"nwa-17364-meteorite-end-cut-slice-ll3-10-chondrite-3-25g-in-gembox-ultra-rare-classification","title":"NWA 17364 LL3.10 Ordinary Chondrite Meteorite End Cut, 3.25g, Sharply Defined Chondrules","description":"\u003ch2\u003ePrimitive chondrules frozen in time\u003c\/h2\u003e\n\u003cp\u003eThis 3.25g end cut exposes the internal structure of NWA 17364, an LL3.10 ordinary chondrite that preserves exceptionally primitive features from the solar nebula. The cut face reveals sharply defined spherical chondrules standing in clear relief against the surrounding matrix. The low metamorphic grade means these millimeter-scale spheres retain their original boundaries and internal textures with minimal alteration since their formation 4.567 billion years ago.\u003c\/p\u003e\n\u003cp\u003eThe end cut format provides a cross-sectional window into the meteorite's interior while retaining one exterior surface. At 3.25 grams, this slice offers substantial viewing area for the chondrule population and matrix structure that characterize this rarely classified subtype.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eChondrules dominate the visible structure, appearing as distinct spherical to elliptical grains distributed throughout the matrix. The LL group designation indicates low total iron and low metal content compared to other ordinary chondrites. The 3.10 petrologic subtype reflects the minimal thermal processing this material experienced on its parent asteroid.\u003c\/p\u003e\n\u003cp\u003eThe primitive matrix between chondrules retains fine-grained material and has not recrystallized into coarser textures. Chondrule boundaries remain sharp rather than blurred by metamorphic integration with surrounding material. This structural preservation makes LL3.10 specimens valuable for understanding pre-accretionary processes in the solar nebula.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eLL ordinary chondrites formed in the asteroid belt approximately 4.567 billion years ago from dust and chondrules that condensed in the solar nebula. The parent asteroid accreted these materials while remaining cool enough to prevent significant thermal alteration. Petrologic type 3.10 sits at the primitive end of the metamorphic sequence, having experienced temperatures barely sufficient to cause any structural change.\u003c\/p\u003e\n\u003cp\u003eThis low degree of thermal processing means the chondrules and matrix preserve their original compositional and textural characteristics. Researchers study such primitive specimens to understand conditions in the early solar system before planetary differentiation began. The LL group specifically provides insight into the oxidation state and volatile content of materials that formed in one particular region of the asteroid belt. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore how classification systems organize these extraterrestrial materials.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17364 is classified in the Meteoritical Bulletin as an LL3.10 ordinary chondrite. You can verify this classification at the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84836\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. Each specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 3.10 petrologic type mean?\u003c\/strong\u003e The number 3.10 indicates this chondrite experienced minimal thermal metamorphism after formation. Type 3.0 to 3.9 chondrites are considered primitive, with lower numbers representing less heating. At 3.10, NWA 17364 retains nearly pristine chondrules and matrix from the solar nebula with only slight thermal alteration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 3.25g end cut displayed in a transparent gem box and a certificate of authenticity. The gem box allows viewing from multiple angles while protecting the specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are LL chondrites less common than H and L types?\u003c\/strong\u003e LL ordinary chondrites represent material from a specific parent asteroid with lower iron and metal content than the more abundant H and L groups. Fewer LL parent body fragments reach Earth, making classified specimens less available to collectors compared to other ordinary chondrite types.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eLL3.10 chondrites occupy a narrow classification window that makes them substantially less common than higher petrologic types. The combination of LL group chemistry and 3.10 metamorphic grade represents a small fraction of available ordinary chondrite material. Collectors seeking primitive chondrites focus on subtypes below 3.15 for their preserved nebular features.\u003c\/p\u003e\n\u003cp\u003eThis end cut format provides display value by exposing internal structure while maintaining specimen integrity. The 3.25g mass offers sufficient size to observe multiple chondrules and matrix characteristics without requiring magnification. The transparent gem box presentation allows examination of both the cut face and the exterior surface. Browse our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection to compare structural features across different ordinary chondrite groups and petrologic types.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=84836\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17364\u003c\/a\u003e | Classification: LL3.10 Ordinary Chondrite | Find, Mali, 2022\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44927148130351,"sku":"NWA-17364-3.25G-ENDCUT","price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17364-ll3-10-end-cut-3-25g-cut-face-on-gloved-hand.heic?v=1780191221"},{"product_id":"nwa-16120-large-slice-ll3-ordinary-chondrite-96-01g-in-gembox","title":"NWA 16120 LL3 Ordinary Chondrite Meteorite Slice, 96.01g, Primitive Type 3 Texture","description":"\u003ch2\u003eLarge primitive chondrite slice with well-preserved type 3 features\u003c\/h2\u003e\n\u003cp\u003eThis 96.01-gram slice of NWA 16120 preserves the coarse texture characteristic of type 3 ordinary chondrites. The low petrologic grade means this material experienced minimal thermal metamorphism after accretion, retaining the physical structure of the earliest solid material in the solar system. Individual chondrules remain distinct throughout the matrix rather than blurred by heat, and the primitive mineralogy remains largely unaltered from its original state 4.567 billion years ago.\u003c\/p\u003e\n\u003cp\u003eThe slice format provides full visibility of the internal structure across a broad cross-section. The LL classification indicates low total iron and low metal content compared to other ordinary chondrite groups, with most iron locked in silicate minerals rather than present as free metal. This specimen's size makes the textural features readable without magnification while maintaining scientific value for study or display.\u003c\/p\u003e\n\u003ch2\u003ePreserved chondrule structure and primitive matrix\u003c\/h2\u003e\n\u003cp\u003eType 3 chondrites like this specimen retain sharply defined chondrule boundaries that have not been homogenized by thermal processing. The matrix between chondrules preserves fine-grained dust and mineral fragments that condensed directly from the solar nebula. Opaque mineral grains distributed throughout represent unoxidized metal and sulfides that formed under reducing conditions in the early solar system.\u003c\/p\u003e\n\u003cp\u003eThe surface texture shows the natural heterogeneity of primitive chondritic material, with variations in grain size and composition visible across the slice. This textural preservation is what distinguishes type 3 chondrites from higher petrologic types, where progressive metamorphism erases these original features.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eLL ordinary chondrites represent material from the outer regions of the asteroid belt, where lower temperatures during solar system formation resulted in less efficient iron incorporation into accreting bodies. The type 3 designation places this specimen among the most scientifically valuable ordinary chondrites because minimal alteration has occurred since the original chondrule-forming events.\u003c\/p\u003e\n\u003cp\u003eThese meteorites formed through the collision and gravitational accumulation of dust, chondrules, and other small particles in the protoplanetary disk. The preservation of this original texture provides a direct record of conditions and processes operating during the first few million years of solar system history. Researchers study type 3 chondrites to understand nebular condensation sequences, chondrule formation mechanisms, and the thermal history of early asteroids. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore how these primitive specimens fit into the broader classification system.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes, NWA 16120 is classified in the Meteoritical Bulletin as an LL3 ordinary chondrite found in Northwest Africa in 2023. You can verify this classification through the Meteoritical Bulletin database. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the LL3 classification mean?\u003c\/strong\u003e LL indicates low total iron content and low metal content within the ordinary chondrite group. The 3 designates the petrologic type, meaning this material experienced minimal thermal metamorphism and retains primitive textures including well-defined chondrules and unequilibrated mineral compositions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 96.01g slice and a certificate of authenticity. The listing notes a GemBox display case, which provides protective storage and clear visibility of the specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are type 3 chondrites important to collectors?\u003c\/strong\u003e Type 3 specimens preserve the original structure of solar system material before significant thermal processing occurred. This makes them scientifically significant and visually distinct from higher petrologic types, where metamorphism has blurred or erased primitive features.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I handle and store this specimen?\u003c\/strong\u003e The slice can be handled directly, though clean hands or gloves prevent oil transfer. The display case protects the specimen from dust and physical damage while allowing full viewing. Store away from humidity extremes to prevent oxidation of metal grains over long timescales.\u003c\/p\u003e\n\u003ch2\u003eDisplay-ready primitive material for serious collections\u003c\/h2\u003e\n\u003cp\u003eAt 96.01 grams, this slice provides substantial presence for display while remaining accessible for collectors building representative suites of ordinary chondrite types. The low petrologic grade makes this specimen scientifically comparable to material analyzed in meteorite research, not just a decorative piece. Type 3 chondrites like NWA 16120 anchor collections focused on primitive solar system materials.\u003c\/p\u003e\n\u003cp\u003eThe size allows clear observation of textural features that define this petrologic type, making it effective for educational use or comparative study alongside metamorphosed specimens. Browse additional primitive specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection or explore contrasting metamorphic grades in our \u003ca href=\"\/collections\/ordinary-chondrites\"\u003eOrdinary Chondrites\u003c\/a\u003e selection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=80051\" rel=\"noopener\" target=\"_blank\"\u003eNWA 16120\u003c\/a\u003e | Classification: LL3 Ordinary Chondrite | Find, Northwest Africa, 2023\u003c\/p\u003e\n\u003cp data-x=\"1\"\u003e \u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44928927727663,"sku":"NWA-16120-96.01G-SLICE","price":290.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-16120-ll3-ordinary-chondrite-slice-gembox.heic?v=1780191092"},{"product_id":"nwa-16975-end-cut-slice-ll3-ordinary-chondrite-68g-in-riker-display-case","title":"NWA 16975 LL3 Ordinary Chondrite Meteorite End Cut, 68.00g, Primitive Chondrules in Riker Case","description":"\u003ch2\u003ePrimitive solar system material in transparent display\u003c\/h2\u003e\n\u003cp\u003eThis 68-gram end cut from NWA 16975 showcases the defining characteristics of LL3 ordinary chondrites: discrete spherical chondrules embedded in primitive matrix material. The end cut format exposes both interior structure and exterior features in a single cross-section, while the Riker case provides unobstructed viewing access from all angles without handling the specimen. The low iron content typical of LL-group chondrites creates subtle color variations across the cut surface, with individual chondrules standing out against the darker matrix.\u003c\/p\u003e\n\u003cp\u003eEnd cuts from the outer portion of a meteorite body often preserve contact zones where fusion crust transitions into unmelted interior material. This specimen captures that boundary, documenting the thermal gradient experienced during atmospheric entry. The transparent Riker case eliminates the need for protective handling while maintaining visual clarity for examination of textural details.\u003c\/p\u003e\n\u003ch2\u003eChondrules and primitive texture\u003c\/h2\u003e\n\u003cp\u003eLL3 chondrites preserve chondrules with sharp boundaries and minimal recrystallization. Individual chondrules remain distinct rather than blending into the surrounding matrix, a characteristic lost at higher petrologic types. The matrix retains fine-grained material that has not been altered by heat or pressure since accretion 4.56 billion years ago. Metallic grains appear as small, dispersed flecks rather than concentrated masses.\u003c\/p\u003e\n\u003cp\u003eThe LL designation indicates low total iron content and low metal content relative to other ordinary chondrite groups. This composition produces specimens with less metallic luster than H or L chondrites, but with correspondingly better preservation of silicate minerals in their original state. Chondrule sizes vary across the cut surface, ranging from submillimeter to several millimeters in diameter.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eType 3 chondrites occupy the lowest metamorphic grade in the petrologic classification system, meaning they experienced minimal heating after formation. This preservation makes them scientifically valuable for studying conditions in the early solar nebula. LL chondrites likely originated from a parent body in the main asteroid belt between Mars and Jupiter, where temperatures remained low enough to prevent thermal alteration of primary minerals and textures.\u003c\/p\u003e\n\u003cp\u003eThe NWA 16975 strewnfield in Algeria yielded multiple specimens in 2024, all classified as LL3 ordinary chondrites. This classification places them among approximately 8% of all ordinary chondrite falls, as LL-group meteorites are less common than H or L types. For more information about chondrite classifications and parent bodies, see our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e guide.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 16975 is classified in the Meteoritical Bulletin as an LL3 ordinary chondrite found in Algeria in 2024. View the official record: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=83316\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin entry\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the \"3\" in LL3 mean?\u003c\/strong\u003e The number indicates petrologic type, which measures the degree of thermal metamorphism experienced by the meteorite. Type 3 is the lowest metamorphic grade, preserving primitive features like well-defined chondrules and unaltered matrix. Higher numbers (4, 5, 6) indicate progressively more heat alteration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 68.00g NWA 16975 end cut meteorite in a Riker presentation case with transparent lid, plus a certificate of authenticity. The case provides display protection without requiring glass or additional framing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are end cuts significant for collectors?\u003c\/strong\u003e End cuts reveal both interior and exterior features in a single piece, showing the transition from fusion crust to unmelted interior. This cross-sectional view documents atmospheric heating effects while exposing internal structure, providing more geological information than either a complete exterior or a pure interior slice.\u003c\/p\u003e\n\u003ch2\u003eType 3 chondrites for serious collections\u003c\/h2\u003e\n\u003cp\u003eCollectors prioritize type 3 chondrites for their scientific value and visual character. The preservation of distinct chondrules creates textural interest absent in more metamorphosed types, where recrystallization obscures original structures. LL-group specimens add diversity to collections dominated by more common H and L chondrites. At 68 grams, this end cut provides substantial material for study or display without premium pricing associated with larger masses.\u003c\/p\u003e\n\u003cp\u003eThe Riker case format offers immediate display capability. The specimen sits securely in cotton batting under a transparent lid, eliminating handling risks while maintaining full visibility. This presentation works for both desktop display and wall mounting. Browse additional primitive chondrite specimens in our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=83316\" rel=\"noopener\" target=\"_blank\"\u003eNWA 16975\u003c\/a\u003e | Classification: LL3 | Find, Algeria, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44928954105903,"sku":"NWA-16975-68G-ENDCUT","price":205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-16975-ll3-ordinary-chondrite-end-cut-slice-display.heic?v=1770001128"},{"product_id":"nwa-17920-carbonaceous-ck6-meteorite-28-53g-full-slice-w-gembox-display-case","title":"NWA 17920 Carbonaceous Chondrite Meteorite Slice, CK6, 28.53g, Complete Cross-Section with Fusion Crust","description":"\u003ch2\u003eComplete cross-section through thermally processed carbonaceous material\u003c\/h2\u003e\n\u003cp\u003eThis 28.53g slice captures the full profile of NWA 17920, a CK6 carbonaceous chondrite recovered from Mali in 2025. The polished surface exposes the specimen's entire interior structure from fusion crust to fusion crust, revealing how thermal metamorphism has recrystallized the original chondritic texture into a compact, homogenized matrix. Dark fusion crust borders frame the polished interior, documenting the atmospheric entry that delivered this material to Earth's surface.\u003c\/p\u003e\n\u003cp\u003eCK6 represents the highest metamorphic grade within the Karoonda group of carbonaceous chondrites. At this petrologic type, sustained heating on the parent body has largely obliterated discrete chondrule boundaries, producing a fine-grained, equilibrated texture that contrasts sharply with the primitive structures preserved in lower-grade carbonaceous types. The oxidized mineralogy remains intact despite this thermal processing, maintaining the chemical signature that defines the CK classification.\u003c\/p\u003e\n\u003cp\u003eThe complete cross-section format makes this slice particularly effective for display, showing both the modified interior structure and the preserved exterior surface that survived atmospheric passage.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe polished face shows the characteristic fine-grained texture of type 6 metamorphism. Original chondrules have been largely erased through recrystallization, leaving a relatively uniform matrix punctuated by scattered mineral grains and occasional relict structures. The thermal processing that produced this texture occurred on the parent body over millions of years, driven by internal heat sources or impact events.\u003c\/p\u003e\n\u003cp\u003eFusion crust edges exhibit the glassy, blackened surface formed during the brief but intense heating of atmospheric entry. This exterior layer contrasts with the lighter interior tones visible on the polished face. The preservation of fusion crust around the slice perimeter confirms this specimen's orientation as a complete cross-section rather than an interior fragment.\u003c\/p\u003e\n\u003cp\u003eThe oxidized mineral assemblage typical of CK chondrites remains present despite metamorphic alteration. This oxidation state distinguishes CK material from reduced carbonaceous types and reflects formation conditions in a parent body region with available oxygen.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eCK chondrites form a distinct subgroup within the carbonaceous chondrite classification, characterized by oxidized minerals and evidence of thermal metamorphism. The parent body for this group remains unidentified, though the oxidation state and metamorphic history suggest formation in a differentiated asteroid that experienced internal heating sufficient to recrystallize primitive materials without complete melting.\u003c\/p\u003e\n\u003cp\u003eType 6 classification indicates equilibration temperatures that homogenized mineral compositions and obliterated most original textural features. This thermal history provides insight into the interior conditions of small planetary bodies during the early solar system, when radiogenic heating and potential impact events drove thermal processing across a range of asteroid types.\u003c\/p\u003e\n\u003cp\u003eThe CK group's oxidized character sets it apart from more reduced carbonaceous types like CV or CO chondrites, demonstrating that carbonaceous material in the asteroid belt formed under varying oxidation conditions. For broader context on meteorite classification and formation, see \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes, NWA 17920 is officially classified in the Meteoritical Bulletin as a CK6 carbonaceous chondrite. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86539\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co. documenting its classification, weight, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does CK6 classification mean?\u003c\/strong\u003e CK indicates the Karoonda group of carbonaceous chondrites, characterized by oxidized minerals and thermal alteration. The number 6 represents the petrologic type, indicating the highest level of thermal metamorphism where original chondrules have been largely recrystallized into a homogenized texture. This reflects sustained heating on the parent body.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 28.53g polished slice with preserved fusion crust edges and a certificate of authenticity. No display stand is included unless specifically noted in the product options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does CK material differ from other carbonaceous chondrites?\u003c\/strong\u003e CK chondrites are more oxidized and thermally processed than primitive carbonaceous types like CI or CM chondrites. While they retain the chemical signature of carbonaceous material, their metamorphic alteration and oxidation state reflect different formation or processing conditions compared to more pristine carbonaceous specimens.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a complete cross-section show that a partial slice does not?\u003c\/strong\u003e A complete cross-section preserves the full profile from exterior fusion crust through the interior structure to the opposite fusion crust edge, documenting both the atmospheric entry surface and the internal texture produced by parent body processes. This provides a more comprehensive view of the specimen's history than an interior-only fragment.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eCK chondrites represent a minority classification within the carbonaceous chondrite group, making them less frequently available than ordinary chondrites or more common carbonaceous types. The combination of carbonaceous chemistry with high-grade metamorphic texture creates a specimen that bridges primitive and processed materials, appealing to collectors who focus on meteorite diversity and thermal history.\u003c\/p\u003e\n\u003cp\u003eThis 28.53g size provides substantial display presence while remaining accessible compared to larger fragments. The complete cross-section format with preserved fusion crust delivers both scientific content and visual appeal, showing the contrast between exterior and interior features in a single specimen. The recent classification in 2025 places this among the newest additions to the carbonaceous chondrite catalog.\u003c\/p\u003e\n\u003cp\u003eFor additional carbonaceous material with different preservation states and metamorphic grades, explore our \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e collection. Collectors interested in other thermally processed stony material may also consider our \u003ca href=\"\/collections\/chondrites\"\u003eChondrites\u003c\/a\u003e offerings.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86539\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17920\u003c\/a\u003e | Classification: Carbonaceous chondrite (CK6) | Find, Mali, 2025\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44998417907759,"sku":"NWA-17920-28.53G-SLICE","price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17920-polished-slice-main-front.heic?v=1780190465"},{"product_id":"nwa-xxx-unclassified-ordinary-chondrite-oriented-complete-stone-with-fusion-crust-787-47g","title":"NWA XXX Ordinary Chondrite Meteorite Individual, Unclassified, 787.47g, Oriented Complete Stone","description":"\u003ch2\u003eOriented atmospheric entry preserved in stone\u003c\/h2\u003e\u003cp\u003eThis 787.47g complete individual from Northwest Africa displays controlled flight orientation throughout atmospheric entry. The stone preserves directional heating evidence across its leading and trailing surfaces, with fusion crust thickness variations that map thermal gradients experienced during passage. Unlike tumbling fragments that show random surface melting, this specimen's asymmetric profile and differential crust development indicate stable flight with a consistent forward-facing surface.\u003c\/p\u003e\u003cp\u003eThe preserved aerodynamic form demonstrates how atmospheric resistance shaped the stone during deceleration. Flow lines in the fusion crust track melt movement across the surface as heating intensity changed with altitude and velocity. Regmaglypts on the trailing surface formed where turbulent airflow created localized pressure variations, sculpting the characteristic thumbprint-like depressions visible across multiple faces of this specimen.\u003c\/p\u003e\u003ch2\u003eFusion crust and surface features\u003c\/h2\u003e\u003cp\u003eContinuous black fusion crust covers the entire exterior, formed as surface temperatures exceeded 1600°C during peak heating. The crust shows variable thickness across different faces, with the presumed leading edge displaying thinner, more heavily ablated material where heating was most intense. Trailing surfaces retain thicker crust with better-preserved flow textures and less thermal erosion.\u003c\/p\u003e\u003cp\u003eRegmaglypts appear most prominently on the lower-heating zones, where surface temperatures allowed plastic deformation rather than complete ablation. These pressure-sculpted depressions range from shallow impressions to deeper cavities, each recording localized airflow patterns during the final kilometers of flight. The transition between heavily ablated leading surfaces and regmaglypt-rich trailing zones demonstrates the thermal gradient this stone experienced while maintaining orientation.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eOrdinary chondrites represent the most abundant meteorite type reaching Earth, formed from primitive solar nebula material approximately 4.567 billion years ago. These stones preserve the earliest solid matter in our solar system, predating planetary formation and containing mineral assemblages unchanged since accretion. The parent bodies of ordinary chondrites are thought to be S-type asteroids in the main asteroid belt between Mars and Jupiter.\u003c\/p\u003e\u003cp\u003eOriented specimens like this one provide insight into atmospheric entry dynamics that fragmentary material cannot. The preserved flight geometry allows reconstruction of entry angle, velocity profiles, and deceleration history based on ablation patterns and crust distribution. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on how these stones survive atmospheric passage and why orientation features matter for understanding entry physics.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is classified as an unclassified ordinary chondrite, meaning it has been identified as meteoric material consistent with ordinary chondritic composition but has not yet received detailed petrologic and chemical classification through the Meteoritical Bulletin system. The stone's fusion crust, density, magnetic properties, and overall appearance confirm its extraterrestrial origin. A certificate of authenticity documenting these characteristics is included with purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for a meteorite?\u003c\/strong\u003e Orientation refers to stable flight through the atmosphere with a consistent leading face rather than random tumbling. Oriented stones develop asymmetric fusion crust distribution, directional flow features, and aerodynamic shaping that records their fixed position during entry. This 787.47g specimen shows clear front-to-back variation in crust thickness and surface textures characteristic of oriented flight.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts and how do they form?\u003c\/strong\u003e Regmaglypts are thumbprint-like depressions sculpted into a meteorite's surface by turbulent airflow during atmospheric passage. They form in zones where localized pressure variations create differential ablation, removing material in smooth curved patterns. On oriented stones, regmaglypts typically appear on lower-heating trailing surfaces where temperatures allowed plastic flow rather than complete vaporization.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 787.47g complete oriented individual and certificate of authenticity are included. No display stand is provided.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy collect a complete individual rather than a cut slice?\u003c\/strong\u003e Complete individuals preserve the meteorite's natural exterior features and original form as recovered, including fusion crust, flight orientation evidence, and regmaglypts that are destroyed when cutting. While slices reveal interior structure, oriented complete stones document atmospheric entry physics and offer a different educational perspective on the meteorite's journey to Earth.\u003c\/p\u003e\u003ch2\u003eDisplay and collecting value\u003c\/h2\u003e\u003cp\u003eOriented complete individuals occupy a distinct niche in meteorite collecting because they preserve entry dynamics rather than internal petrography. This specimen's substantial 787.47g mass provides significant visual presence while remaining manageable for display. The combination of full crust coverage, clear orientation features, and well-developed regmaglypts makes this stone suitable for collections focused on atmospheric phenomena or for educational demonstrations of entry physics.\u003c\/p\u003e\u003cp\u003eThe unclassified status does not diminish the specimen's scientific or display merit. The preserved exterior features and flight geometry are independent of petrologic classification and represent physical evidence of the stone's atmospheric passage. Collectors building \u003ca href=\"\/collections\/ordinary-chondrites\"\u003eOrdinary Chondrite\u003c\/a\u003e reference collections will find oriented complete stones valuable for comparison with cut specimens, demonstrating how exterior and interior characteristics complement each other in understanding these primitive materials. For those interested in atmospheric entry evidence across different meteorite types, this specimen pairs well with oriented irons and stones from \u003ca href=\"\/collections\/stony-meteorites\"\u003eStony Meteorites\u003c\/a\u003e collections to illustrate how composition affects ablation patterns and surface feature development.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45082531135535,"sku":"NWA-XXX-787.47G-INDIVIDUAL-ORIENTED","price":775.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-unclassified-ordinary-chondrite-oriented-meteorite-complete-individual-787.47g-treasure-coast-meteorite-co-1.heic?v=1774230404"},{"product_id":"probable-cm2-carbonaceous-chondrite-meteorite-oriented-individual-21-95-g-nwa-unclassified","title":"NWA XXX Carbonaceous Chondrite Meteorite Individual, CM2-type, 21.95g, Oriented with Fusion Crust","description":"\u003ch2\u003eOriented carbonaceous chondrite with atmospheric flight features\u003c\/h2\u003e\u003cp\u003eThis 21.95g individual shows directional heating marks and preserved fusion crust across approximately 50% of its surface, evidence of stable atmospheric orientation during entry. The darker, fine-grained exterior is consistent with CM2-type carbonaceous material, though this specimen remains unclassified. The stone retains its natural flight-formed shape with minimal fragmentation, combining scientific interest with visual clarity for display.\u003c\/p\u003e\u003cp\u003eCM2-type material is among the most primitive in meteorite collections, representing chemically unaltered solar nebula components and evidence of water-rock interaction on the parent body. This individual's preserved exterior makes those early solar system processes directly observable without laboratory thin-sectioning.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe fusion crust shows glossy black glass where atmospheric heating was most intense, transitioning to darker matrix-rich material beneath. Oriented stones like this form when a meteorite maintains consistent flight geometry during atmospheric passage, producing asymmetric heating patterns visible as directional flow lines and varying crust thickness. The stone's shape reflects aerodynamic sculpting rather than random fragmentation.\u003c\/p\u003e\u003cp\u003eRegmaglypts, or thumbprint-like depressions, mark areas where differential ablation occurred during entry. The fine-grained matrix typical of CM2-type carbonaceous chondrites appears darker and more fragile than ordinary chondrite material, reflecting higher carbon content and phyllosilicate minerals from parent body aqueous alteration billions of years ago.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eCM2 carbonaceous chondrites preserve the most primitive solid matter in the solar system, material that condensed directly from the solar nebula over 4.5 billion years ago. These meteorites contain hydrated minerals formed when liquid water circulated through their parent asteroid, altering olivine and pyroxene into clay minerals while leaving organic compounds and presolar grains intact. That combination of aqueous alteration and preserved primitive components makes CM2 chondrites scientifically significant for understanding early solar system chemistry and the conditions that may have led to life.\u003c\/p\u003e\u003cp\u003eWhile this specimen is not formally classified, its physical characteristics align with known CM2 properties: dark matrix, fine grain size, and relatively low density compared to ordinary chondrites. Collectors and researchers value these meteorites for their connection to the earliest planetary processes. Learn more about meteorite identification and classification in our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e guide.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e This specimen is an unclassified Northwest Africa find from 2025, identified as consistent with CM2-type carbonaceous chondrite material based on physical characteristics. Because it has not been submitted for formal classification through the Meteoritical Society, it is presented as CM2-type rather than a confirmed CM2 chondrite. A certificate of authenticity documenting its meteoritic origin is included with purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does \"oriented\" mean for a meteorite?\u003c\/strong\u003e Oriented meteorites maintained a stable flight attitude during atmospheric entry, causing directional heating and asymmetric fusion crust development. This produces recognizable aerodynamic features like flow lines, leading-edge ablation, and trailing-edge smoothness, making the stone's atmospheric passage history visible in its final form.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 21.95g carbonaceous chondrite individual exactly as shown, with certificate of authenticity. No display stand is included unless separately confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is this listed as CM2-type instead of CM2?\u003c\/strong\u003e The Meteoritical Bulletin has not published a classification for this specimen, so scientific accuracy requires using \"CM2-type\" to describe observed characteristics rather than stating a confirmed classification. This distinction maintains integrity while accurately describing what the stone appears to be based on physical examination.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the significance of fusion crust on carbonaceous chondrites?\u003c\/strong\u003e Fusion crust on carbonaceous material is particularly valued because these meteorites are more fragile than iron-rich stones and often lose their exterior through weathering or handling. Preserved crust directly documents atmospheric entry and provides visual contrast against the darker interior matrix.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eCarbonaceous chondrites represent less than 5% of observed meteorite falls, making them substantially less common in collections than ordinary chondrites or iron meteorites. CM2-type material is sought specifically for its scientific importance and distinctive appearance: darker color, lower density, and fine-grained texture that differentiates it immediately from more common stony meteorites.\u003c\/p\u003e\u003cp\u003eThis individual's oriented exterior and partial fusion crust preservation add display value beyond generic carbonaceous fragments. The stone stands independently without requiring a mount, and its directional heating features tell a readable story about atmospheric entry mechanics. For collectors building representative type collections or focusing on primitive solar system material, CM2-type specimens occupy an essential position. Browse additional primitive meteorites in our \u003ca href=\"\/collections\/carbonaceous-chondrites\"\u003eCarbonaceous Chondrites\u003c\/a\u003e collection.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45082670530607,"sku":"NWA-XXX-21.95G-INDIVIDUAL-ORIENTED","price":1250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/probable-cm2-carbonaceous-chondrite-meteorite-oriented-individual-21.95g-treasure-coast-meteorite-co-1.heic?v=1779370630"},{"product_id":"nwa-18118-oriented-h5-ordinary-chondrite-644g-main-mass-individual","title":"NWA 18118 Oriented H5 Ordinary Chondrite, 644g Main Mass Individual","description":"\u003ch2\u003eNWA 18118, an oriented H5 main mass\u003c\/h2\u003e\n\u003cp\u003eNWA 18118 is an officially classified H5 ordinary chondrite from Northwest Africa, offered here as a 644 gram oriented main mass individual. The total known weight recorded in the Meteoritical Bulletin is 682 grams, so this single stone accounts for the large majority of all documented material for NWA 18118. It is offered uncoated and substantially complete, with only a small classification window removed for analysis.\u003c\/p\u003e\n\u003ch2\u003eStructure and surface features\u003c\/h2\u003e\n\u003cp\u003eThe stone shows a domed, shield-like profile consistent with an oriented flight position, in which a single leading face was held forward as the meteorite descended through the atmosphere. The exterior shows tones of brown and gray, with contoured surface relief and light desert patina from its time on the ground. A small area of caliche, a natural carbonate deposit picked up in the field, is present on one surface. The classification window exposes a fresh interior, where metal grains are visible as bright flecks alongside scattered chondrules set in a tan to gray matrix. Minor brown oxidation staining is present in the interior, as is typical of a desert find.\u003c\/p\u003e\n\u003ch2\u003eDiscovery and provenance\u003c\/h2\u003e\n\u003cp\u003eNWA 18118 was recovered in Morocco and entered the scientific record with its classification published in the Meteoritical Bulletin, database entry 114, with a recovery year of 2024. The specimen carries a painted collection number on its reverse, consistent with documented Northwest African field material. It is offered with Treasure Coast Meteorite Co. provenance and the classification details noted below.\u003c\/p\u003e\n\u003ch2\u003eScientific context, the H5 ordinary chondrite\u003c\/h2\u003e\n\u003cp\u003eOrdinary chondrites are the most abundant class of meteorite, and the H group is defined by high total iron content, a significant portion of it present as free metal. The petrologic type 5 indicates thermal metamorphism within the parent asteroid that partially equilibrated the original chondritic material while leaving chondrules still discernible. NWA 18118 was classified as H5 by magnetic susceptibility measurement. The Meteoritical Bulletin notes that this classification carries larger than normal uncertainty, which we state plainly here in the interest of full transparency. The official type of record remains H5.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs NWA 18118 officially classified?\u003c\/strong\u003e\u003cbr\u003eYes. It is an officially classified H5 ordinary chondrite recorded in the Meteoritical Bulletin, entry 114.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does oriented mean?\u003c\/strong\u003e\u003cbr\u003eAn oriented meteorite held a stable position during atmospheric flight, ablating preferentially on its leading face and developing a directional, often domed or conical, shape. Oriented stones are sought after by collectors for that flight history.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the complete known mass?\u003c\/strong\u003e\u003cbr\u003eThe total known weight on record is 682 grams. This specimen is the 644 gram main mass, with the balance accounted for by the classification sample and cutting loss.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHas the stone been coated or treated?\u003c\/strong\u003e\u003cbr\u003eNo. It is offered in natural condition, with no epoxy or stabilizing coating.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eOwning the main mass of a classified meteorite places the single most significant piece of that find into one collection. At 644 grams against a 682 gram total known weight, NWA 18118 brings together main mass status, an oriented flight form, and an official H5 classification in one specimen. The full classification can be reviewed in the Meteoritical Bulletin entry for NWA 18118. Treasure Coast Meteorite Co., IMCA #3323.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45407543885871,"sku":"NWA18118-644G-INDIVIDUAL","price":644.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-18118-h5-chondrite-644g-oriented-individual.jpg?v=1780354414"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/collections\/IMG_5377_2.jpg?v=1766197639","url":"https:\/\/www.tcmeteorites.com\/collections\/chondrites.oembed?page=2","provider":"Treasure Coast Meteorite Co.","version":"1.0","type":"link"}