{"title":"Eucrites","description":"\u003cp\u003eEucrites are basaltic achondrites from the surface of asteroid 4 Vesta, the second largest body in the asteroid belt. They are pieces of an ancient extraterrestrial lava flow, crystallized roughly 4.5 billion years ago when Vesta still had an active magma ocean. Unless specifically stated in the listing, specimens in this collection are Meteoritical Bulletin classified.\u003c\/p\u003e\n\n\u003ch2\u003eHow we verify eucrites 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. Vesta origin is confirmed through oxygen isotope ratios, pyroxene chemistry, and reflectance spectra that match measurements made directly at Vesta by NASA's Dawn mission. 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\u003eEucrite subtypes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBasaltic eucrites\u003c\/strong\u003e formed as Vesta's surface lava flows. They contain pigeonite and plagioclase in a fine-grained basaltic texture, sometimes preserving original volcanic features.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCumulate eucrites\u003c\/strong\u003e crystallized more slowly at depth in Vestan magma chambers. They have coarser grain sizes and reflect slower cooling, with pyroxenes that record protracted crystallization histories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolymict eucrites\u003c\/strong\u003e are breccias composed of multiple eucrite clasts produced by impact mixing on Vesta's surface. Some polymict eucrites grade into the howardite category if they contain enough diogenite material.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow can I tell a eucrite is real?\u003c\/strong\u003e Authentic eucrites have a Meteoritical Bulletin entry, ship with documentation, and show characteristic basaltic texture or brecciated structure. Classification confirms Vesta origin through isotopic 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\u003eAre eucrites magnetic?\u003c\/strong\u003e Eucrites contain very little metallic iron and are typically not magnetic in any noticeable way. A strongly magnetic specimen marketed as a eucrite warrants closer inspection. Read more: \u003ca href=\"\/pages\/are-meteorites-magnetic\"\u003eAre Meteorites Magnetic?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a eucrite, a howardite, and a diogenite?\u003c\/strong\u003e All three come from Vesta. Eucrites are basaltic crust, diogenites are deeper orthopyroxene-rich rocks, and howardites are impact breccias containing mixtures of both. Together they form the HED clan. Read more: \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much do eucrites cost?\u003c\/strong\u003e Eucrites are relatively affordable compared to lunar or Martian achondrites, but premium polished slices and named falls command higher prices. Read more: \u003ca href=\"\/pages\/how-much-do-meteorites-cost\"\u003eHow Much Do Meteorites Cost?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these specimens authenticated?\u003c\/strong\u003e Unless otherwise noted, every eucrite 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\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e · \u003ca href=\"\/collections\/diogenites\"\u003eDiogenites\u003c\/a\u003e · \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e · \u003ca href=\"\/collections\/stony-meteorites\"\u003eStony 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-18048-eucrite-pmict-meteorite-hed-large-mirror-polished-slice-133-72g","title":"NWA 18048 Eucrite-pmict Meteorite Slice, 133.72g, Mirror Polished, HED Achondrite from Vesta","description":"\u003ch2\u003eClast boundaries revealed through mirror polish\u003c\/h2\u003e\u003cp\u003eThis 133.72-gram slice of NWA 18048 presents a textural mosaic of eucritic fragments embedded in a darker groundmass. The mirror polish transforms the cut surface into a display of compositional contrasts, where lighter clasts stand against melt-rich matrix zones. Boundaries between fragments appear sharp in some areas and diffuse in others, recording different stages of impact mixing and thermal processing.\u003c\/p\u003e\u003cp\u003eThe specimen's size and finish make the internal architecture immediately legible. Fragment shapes range from angular to subrounded, suggesting variable transport histories before final consolidation. Dark matrix material fills interstitial spaces, creating a framework that holds the clast population together while preserving evidence of the mechanical forces that assembled this breccia.\u003c\/p\u003e\u003cp\u003eThe polishing reveals subtle color gradations within individual clasts, hinting at mineralogical variation between basaltic components. This level of visual detail transforms the specimen from a geological sample into a readable record of asteroid surface processes.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003ePolymict texture dominates this specimen, with clast sizes varying from millimeter-scale fragments to larger blocks several centimeters across. The clast population consists primarily of basaltic material with varying grain sizes, reflecting different cooling histories from the parent body's volcanic past.\u003c\/p\u003e\u003cp\u003eMatrix material between clasts appears fine-grained and darker than the enclosed fragments. Some matrix zones show flow textures consistent with impact melt, while others display granular character suggesting mechanical mixing of crushed material. The polish brings out these textural differences by eliminating surface roughness that would otherwise obscure subtle structural boundaries.\u003c\/p\u003e\u003cp\u003eCertain clasts display internal crystalline structure visible under magnification, while others appear more homogeneous. This variation records the diverse crustal environments that contributed material to this breccia. No fusion crust remains on this interior slice, which was removed from a larger mass during laboratory preparation.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eNWA 18048 belongs to the HED achondrite group, a meteorite family tied to asteroid 4 Vesta through spectroscopic data collected by NASA's Dawn mission. Eucrites represent the basaltic crust of this body, formed through volcanic processes after the asteroid differentiated into core, mantle, and crust approximately 4.56 billion years ago.\u003c\/p\u003e\u003cp\u003eThe polymict classification indicates this specimen formed through regolith processes rather than as a simple igneous rock. Repeated impacts fractured Vesta's surface, mixed crustal fragments, and created layers of debris that were later compacted and lithified. Some polymict eucrites incorporate impact melt, creating a hybrid rock that records both volcanic and collision histories.\u003c\/p\u003e\u003cp\u003eThis dual record makes polymict eucrites valuable for understanding asteroid surface evolution. They demonstrate how impact cratering reworks planetary crusts, creating new rock types through mechanical and thermal processes. For broader context on meteorite types and formation, see our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e page.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 18048 is classified as eucrite-pmict in the Meteoritical Bulletin Database maintained by the Meteoritical Society. You can verify this classification by searching the official database. Each specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does polymict mean?\u003c\/strong\u003e Polymict (pmict) indicates a brecciated meteorite containing fragments from multiple source rocks. In this eucrite, polymict texture results from impact processes that mixed different basaltic components on Vesta's surface before the material was lithified into a consolidated breccia.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 133.72g mirror-polished slice and a certificate of authenticity. No display stand is included unless explicitly noted in the product listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this connected to asteroid Vesta?\u003c\/strong\u003e Spectroscopic observations by NASA's Dawn spacecraft confirmed that Vesta's surface composition matches the HED meteorite group. Eucrites like NWA 18048 are fragments of Vesta's basaltic crust, ejected by impacts and delivered to Earth as meteorites.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the polish matter?\u003c\/strong\u003e Mirror polishing removes surface texture and oxidation, revealing internal structure with maximum clarity. Clast boundaries, matrix composition, and color variations become visible in ways that rough or weathered surfaces cannot show.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eEucrite slices appeal to collectors seeking specimens with clear internal structure and confirmed asteroid origins. The mirror polish on this piece maximizes visual information, making it equally suitable for display and study. At 133.72 grams, the specimen offers substantial size while remaining within accessible price ranges for HED material.\u003c\/p\u003e\u003cp\u003ePolymict eucrites occupy a specific niche within collections focused on differentiated bodies. They complement simple eucrites by showing how impact processes rework and complicate igneous rocks. The visible clast population in this specimen provides immediate evidence of that reworking, making the geological story accessible without microscopy.\u003c\/p\u003e\u003cp\u003eFor collectors building HED suites, polymict eucrites add textural diversity alongside cumulate and basaltic end members. Browse additional specimens from Vesta in our \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18048\u003c\/a\u003e | Classification: Eucrite-pmict | Find, Northwest Africa, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44859328167983,"sku":"NWA-18048-133.72G-SLICE-MP","price":530.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7539.heic?v=1768189699"},{"product_id":"nwa-18048-eucrite-pmict-meteorite-hed-large-mirror-polished-slice-120-00g","title":"NWA 18048 Eucrite-pmict Meteorite Slice, 120.00g, Mirror Polished HED Achondrite from Vesta","description":"\u003ch2\u003eMirror-polished polymict eucrite with vivid clast structure\u003c\/h2\u003e\n\u003cp\u003eThis 120.00g slice showcases the complex architecture of a polymict eucrite breccia. The mirror polish on one face reveals distinct light and dark clasts suspended in an impact-processed matrix. Lighter eucritic fragments contrast sharply against darker melt zones, creating a mosaic that documents Vesta's violent surface history. The finish brings out fine-scale details invisible in rough specimens: clast boundaries, melt veins threading between fragments, and variations in mineral grain size across different lithologies.\u003c\/p\u003e\n\u003cp\u003eAt 120.00g, this specimen offers substantial display presence. The slice is large enough to show the full spectrum of polymict textures while remaining manageable for cabinet storage. The mirror polish eliminates surface irregularities that can obscure internal features, making this piece suitable for detailed examination under magnification or display lighting.\u003c\/p\u003e\n\u003ch2\u003eBrecciation and impact melt architecture\u003c\/h2\u003e\n\u003cp\u003eThe slice preserves multiple generations of impact processing. Eucritic clasts, fragments of basaltic crust from Vesta's surface, appear as angular to subangular inclusions. These clasts vary in size and composition, indicating they were excavated from different depths or locations on the asteroid before being mixed together. The matrix surrounding these fragments contains impact melt, dark material formed when kinetic energy from high-velocity collisions liquefied rock.\u003c\/p\u003e\n\u003cp\u003eMelt veins cut through the specimen in irregular pathways. These veins represent shock-melted material that intruded into fractures during impact events. The thickness and distribution of these veins indicate the intensity of the collisions that created this breccia. Some clasts show sharp, well-defined boundaries against the matrix, while others grade into surrounding material, suggesting partial melting or recrystallization at their margins.\u003c\/p\u003e\n\u003ch2\u003eVesta's basaltic crust and HED meteorite formation\u003c\/h2\u003e\n\u003cp\u003eNWA 18048 originated from asteroid 4 Vesta, the second-largest body in the asteroid belt. NASA's Dawn spacecraft confirmed that eucrites, diogenites, and howardites, collectively called HED meteorites, come from Vesta's differentiated crust and mantle. Eucrites specifically represent basaltic material from Vesta's surface, formed when the asteroid's interior melted early in solar system history. Magma rose to the surface and crystallized into basaltic crust, similar to lunar mare basalts or terrestrial flood basalts.\u003c\/p\u003e\n\u003cp\u003ePolymict eucrites like this specimen formed when massive impacts shattered Vesta's crust, mixing fragments from different crustal layers. The mixing process created breccias containing both pristine eucritic material and impact-modified components. Study of these meteorites has revealed Vesta's thermal history, differentiation processes, and the role of impact bombardment in shaping asteroid surfaces. For more context on meteorite classification and identification, 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 18048 is classified in the Meteoritical Bulletin as a eucrite-pmict. You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin entry for NWA 18048\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and origin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"pmict\" mean in the classification?\u003c\/strong\u003e The abbreviation \"pmict\" stands for polymict, indicating this eucrite is a breccia containing multiple rock types. Unlike monomict eucrites (single-composition rocks), polymict eucrites contain clasts of different compositions mixed together during impact events. This specimen contains eucritic basalt fragments, impact melt, and possibly minor amounts of other HED material, all welded together by subsequent impacts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this specimen mirror polished?\u003c\/strong\u003e Mirror polishing removes surface irregularities and reveals internal structure with maximum clarity. The technique uses progressively finer abrasives to create an optically smooth surface that reflects light uniformly. This finish allows detailed examination of clast boundaries, melt veins, and mineral textures that would be obscured on a rough or sawn surface. It also makes the specimen suitable for photomicrography and educational display.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 120.00g mirror-polished slice and a certificate of authenticity. The certificate documents the meteorite's classification, weight, and find location. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow did this meteorite reach Earth from Vesta?\u003c\/strong\u003e Large impacts on Vesta ejected fragments into space at velocities exceeding the asteroid's escape velocity (approximately 360 meters per second). These fragments entered independent orbits around the Sun, where gravitational interactions with planets gradually altered their trajectories. Eventually, some fragments intersected Earth's orbit and fell as meteorites. The process can take millions of years from initial ejection to atmospheric entry.\u003c\/p\u003e\n\u003ch2\u003eDisplay-grade HED specimen for planetary collections\u003c\/h2\u003e\n\u003cp\u003eCollectors focused on differentiated asteroids prioritize polymict eucrites for their scientific and visual complexity. This 120.00g slice combines size, structural clarity, and professional preparation. The mirror polish eliminates the preparation artifacts common in hastily finished specimens, saw marks, uneven surfaces, edge chipping, that detract from serious collections.\u003c\/p\u003e\n\u003cp\u003eLarge eucrite slices are underrepresented in the market compared to chondrites or common iron meteorites. Most NWA finds are recovered as small fragments requiring reassembly or irregular pieces unsuitable for full polishing. A complete slice at this weight, showing clear polymict textures across its entire face, represents a specimen tier above typical dealer offerings. For collectors building comprehensive HED suites, explore our complete \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 18048\u003c\/a\u003e | Classification: Eucrite-pmict | Find, Northwest Africa, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44859333312559,"sku":"NWA-18048-120.00G-SLICE-MP","price":480.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7549.heic?v=1768190492"},{"product_id":"nwa-18048-eucrite-pmict-meteorite-hed-large-mirror-polished-slice-119-29g","title":"NWA 18048 Eucrite-pmict Meteorite Slice, 119.29g, Mirror Polished Impact Breccia","description":"\u003ch2\u003eImpact-fused crustal fragments from asteroid 4 Vesta\u003c\/h2\u003e\n\u003cp\u003eThis 119.29g eucrite-pmict slice preserves a frozen record of ancient impact violence on Vesta's surface. Mirror polishing on one face reveals a complex mosaic where light and dark lithologies meet along sharp clast boundaries, interrupted by thick melt veins that flow through the matrix. The polymict texture shows fragments of different eucritic materials welded together during collision events that fractured and re-cemented Vesta's basaltic crust billions of years ago.\u003c\/p\u003e\n\u003cp\u003eThe mirror finish brings exceptional clarity to features that would remain obscure in a natural or lightly polished surface. Clast edges stand in sharp relief against the surrounding matrix. Melt zones appear as dark, glassy regions where impact energy temporarily liquefied the rock. The size of this slice provides room to observe how different components relate spatially across the specimen, offering a window into the mechanical mixing processes that shaped Vesta's regolith.\u003c\/p\u003e\n\u003cp\u003eAt nearly 120 grams, this specimen represents a substantial example of classified polymict eucrite material. Complete slices of this size with professional mirror preparation occur infrequently in the collector market, particularly from meteorites with total known weights measured in single-digit kilograms.\u003c\/p\u003e\n\u003ch2\u003eClast boundaries and impact melt features\u003c\/h2\u003e\n\u003cp\u003eThe slice displays distinct eucritic clasts ranging from light gray to nearly black, each fragment representing a different episode of volcanism or impact processing on Vesta. Where clasts meet, boundaries range from sharp fracture lines to gradational zones where impact heating partially melted and mixed adjacent materials. The mirror polish reveals crystalline structure within individual clasts, showing the original igneous texture of Vestan basalt frozen at various cooling rates.\u003c\/p\u003e\n\u003cp\u003eMelt veins cut across clast boundaries in multiple orientations, recording separate impact events that fractured already-brecciated material. These veins appear darker than surrounding clasts due to rapid quenching from molten to solid state. Some melt zones reach several millimeters in width, indicating significant local heating. The distribution of melt throughout the slice suggests this material comes from a zone that experienced repeated impact gardening rather than a single catastrophic collision.\u003c\/p\u003e\n\u003cp\u003eShock features visible under magnification include planar fractures in pyroxene crystals and deformation textures along grain boundaries. The preservation of these features alongside the coarse clast structure indicates shock pressures sufficient to melt and mix without completely homogenizing the original components.\u003c\/p\u003e\n\u003ch2\u003eBasaltic volcanism and the HED parent body\u003c\/h2\u003e\n\u003cp\u003eEucrites formed from magma oceans on asteroid 4 Vesta approximately 4.565 billion years ago, shortly after solar system formation. As Vesta's interior differentiated, less dense silicate melts rose to form a basaltic crust while metal and dense silicates sank toward the core. The eucritic clasts in this specimen represent fragments of that ancient crust, each potentially from different lava flows or plutonic intrusions that crystallized at varying depths and cooling rates.\u003c\/p\u003e\n\u003cp\u003eThe polymict classification indicates this meteorite consists of multiple lithologic components mixed through impact gardening. Vesta's lack of atmosphere and geological activity meant that impacts remained the sole mechanism for reworking surface materials over billions of years. Each collision fractured bedrock, ejected material, and deposited mixed ejecta that became lithified through compression and impact heating. The clasts in NWA 18048 may have originated kilometers apart on Vesta's surface before being combined in the impact event that created this breccia.\u003c\/p\u003e\n\u003cp\u003eNASA's Dawn mission confirmed Vesta as the HED parent body through detailed spectral mapping and crater analysis. Dawn data showed that major impact basins excavated deep enough to expose subsurface lithologies and create extensive ejecta blankets of mixed material. This specimen likely formed in such an environment before being launched into space by a subsequent impact energetic enough to overcome Vesta's gravity. For more context on how scientists identify and classify space rocks, visit our guide: \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 NWA 18048 received official classification as eucrite-pmict through analysis and submission to the Meteoritical Society. The classification appears in the Meteoritical Bulletin Database: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" target=\"_blank\"\u003eNWA 18048\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its provenance and classification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does polymict mean in eucrite-pmict?\u003c\/strong\u003e Polymict indicates the specimen contains clasts of different lithologic types mixed together, as opposed to monomict breccias where all fragments come from the same parent rock. In eucrites, this typically means multiple generations of basaltic material combined through impact gardening on Vesta's surface. The \"pmict\" abbreviation distinguishes these impact breccias from single-lithology eucrites that cooled as intact igneous bodies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 119.29g mirror-polished slice shown in the photographs and a certificate of authenticity. No display stand is included unless separately noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this specimen mirror polished?\u003c\/strong\u003e Mirror polishing reveals internal structure that remains hidden in rough or naturally weathered surfaces. The technique uses progressively finer abrasives to create an optically flat surface that shows clast boundaries, melt veins, crystal structure, and compositional variations with maximum clarity. For eucrite-pmict specimens, mirror finishing is the optimal preparation method to display the complex brecciation that defines the classification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow did this meteorite reach Earth from Vesta?\u003c\/strong\u003e Large impacts on Vesta eject material at velocities exceeding the asteroid's escape velocity (approximately 360 meters per second). Ejected fragments enter independent solar orbits until gravitational interactions or additional collisions alter their trajectories. Some eventually intersect Earth's orbit. The time between ejection and Earth arrival can range from hundreds of thousands to millions of years. Cosmic ray exposure studies on HED meteorites suggest typical transit times of several million years.\u003c\/p\u003e\n\u003ch2\u003eDisplay-grade specimen from a restricted inventory\u003c\/h2\u003e\n\u003cp\u003eLarge mirror-polished eucrite slices appear infrequently in the collector market. Most polymict eucrite material available consists of small fragments, partial slices, or unpolished end cuts. Complete slices exceeding 100 grams with professional mirror preparation represent a small fraction of available inventory across all dealers. The preparation quality in this specimen, flat polishing without edge rollover, uniform finish, preserved clast structure, indicates experienced laboratory work rather than amateur processing.\u003c\/p\u003e\n\u003cp\u003eThis piece functions equally well as a research reference, teaching specimen, or display centerpiece. The size provides enough surface area to observe multiple melt generations and clast relationships simultaneously, while the mirror finish allows direct observation of mineralogy and texture under magnification. Collectors focusing on differentiated asteroids, impact processes, or \u003ca href=\"\/collections\/eucrites\"\u003eeucrites\u003c\/a\u003e specifically will find this specimen demonstrates key features of polymict impact breccias from Vesta's ancient crust. For those building comprehensive HED collections, substantial polymict examples complement monomict eucrites and diogenites by illustrating the mechanical mixing processes that dominated Vesta's surface evolution. Browse our full selection of Vestan materials: \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" target=\"_blank\"\u003eNWA 18048\u003c\/a\u003e | Classification: Eucrite-pmict | Find, Northwest Africa, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44859339112495,"sku":"NWA-18048-119.29G-SLICE-MP","price":480.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7559.heic?v=1768191472"},{"product_id":"nwa-18048-eucrite-pmict-meteorite-hed-large-mirror-polished-slice-128-81g","title":"NWA 18048 Eucrite-pmict Meteorite Slice, 128.81g, Mirror Polished, Vivid Clast Boundaries","description":"\u003ch2\u003eLarge polished slice with defined clast structure\u003c\/h2\u003e\u003cp\u003eThis 128.81g mirror-polished slice shows sharp boundaries between light and dark eucritic clasts suspended in an impact-generated matrix. The polish brings out textural contrast across the entire surface, making the polymict nature of this material immediately apparent. Thick melt veins cut through multiple clast types, recording the high-energy collisions that broke and reassembled Vesta's basaltic crust. The size allows clear observation of individual clast morphologies and their spatial relationships within the breccia framework.\u003c\/p\u003e\u003cp\u003eThe finish reveals internal detail without obscuring the primary brecciation. Clast shapes range from angular fragments to more rounded inclusions, indicating varying degrees of shock metamorphism and thermal processing during impact events. Matrix material fills the spaces between clasts, preserving a snapshot of the chaotic reassembly process that created this polymict lithology.\u003c\/p\u003e\u003ch2\u003ePolymict breccia formation on Vesta\u003c\/h2\u003e\u003cp\u003eEucrite-pmict meteorites form when high-velocity impacts shatter Vesta's basaltic surface, mixing fragments of different eucritic compositions. The collision generates enough heat to produce local melting, creating the melt veins and darker matrix material that bind the clast assemblage together. This specimen preserves multiple generations of impact processing: the initial fragmentation of individual basaltic flows, their mechanical mixing, and subsequent welding by impact-generated melt.\u003c\/p\u003e\u003cp\u003eThe clast population includes both fine-grained and coarser-textured eucrite fragments, suggesting source materials from different depths or cooling histories within Vesta's crust. Some clasts show internal brecciation themselves, indicating they survived earlier impact events before incorporation into this polymict assemblage. The melt veins crosscut clast boundaries without thermal alteration of adjacent fragments, pointing to rapid quenching after the impact that created this breccia.\u003c\/p\u003e\u003ch2\u003eVestan crust and the HED connection\u003c\/h2\u003e\u003cp\u003eEucrites originate from asteroid 4 Vesta, the second-largest object in the main asteroid belt. NASA's Dawn spacecraft confirmed the connection between HED meteorites and Vesta through spectroscopic matching and surface imaging. Vesta differentiated early in solar system history, developing a basaltic crust similar to terrestrial oceanic crust. Eucrites sample this ancient igneous layer, providing direct evidence of planetary-scale melting and magmatic differentiation within the first few million years of solar system formation.\u003c\/p\u003e\u003cp\u003ePolymict eucrites specifically record the impact history that modified Vesta's surface after initial crustal solidification. The large south polar impact basin excavated deep crustal and possibly mantle material, distributing ejecta across the asteroid and mixing different lithologies. This specimen represents that process at the hand sample scale. HED meteorites collectively offer one of the most complete records of early planetary evolution available for laboratory study. Learn more about meteorite classification and analysis 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 18048 is classified as eucrite-pmict by the Meteoritical Society. You can verify this classification in the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does polymict mean in this context?\u003c\/strong\u003e Polymict describes a breccia containing clasts of multiple compositional or textural types. In this eucrite, the \"pmict\" designation indicates the presence of eucritic fragments from different basaltic sources, all mixed and cemented by impact processes on Vesta's surface. This distinguishes it from monomict eucrites, which contain clasts of a single uniform composition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 128.81g polished slice and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is this specimen mirror polished?\u003c\/strong\u003e Mirror polishing maximizes contrast between clast types and matrix material, revealing internal structure that remains obscure on rough or fusion-crusted surfaces. The finish allows detailed examination of clast boundaries, melt vein relationships, and textural variation across the slice. Collectors and researchers use polished sections to study mineralogy, shock effects, and brecciation mechanisms in basaltic achondrites.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does this specimen compare to other eucrites?\u003c\/strong\u003e Most eucrite meteorites on the market are unbrecciated basalts or small fragments of polymict material. A large polished slice showing clear clast structure occupies the intersection of scientific interest and display quality. The 128.81g mass provides enough surface area to observe multiple clast types and their spatial distribution within the breccia framework.\u003c\/p\u003e\u003ch2\u003eDisplay and collection value for HED specialists\u003c\/h2\u003e\u003cp\u003ePolymict eucrites represent a small fraction of classified HED meteorites, making them less common than unbrecciated basaltic eucrites. Large polished slices are further constrained by the economics of cutting and finishing, as most material from new finds is sold as smaller end cuts or broken fragments. This specimen combines size, preparation quality, and clear textural expression of the polymict lithology.\u003c\/p\u003e\u003cp\u003eThe mirror finish makes this slice suitable for both display and detailed examination. Clast boundaries remain sharp under magnification, and the polish does not obscure primary textures. For collectors building comprehensive HED suites, polymict eucrites fill a specific niche between simple basaltic samples and howardites. Institutional collections use specimens like this to teach impact processes, planetary differentiation, and asteroid geology in contexts where students can directly observe the physical evidence. Explore more Vestan material in the \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2018048\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18048\u003c\/a\u003e | Classification: Eucrite-pmict | Find, Northwest Africa, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44859341373487,"sku":"NWA-18048-128.81G-SLICE-MP","price":520.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7571.heic?v=1768192031"},{"product_id":"nwa-18452-eucrite-br-hed-meteorite-slice-33-79g-mirror-polish-uv-fluorescent-with-phosphorescence","title":"NWA 18452 Eucrite-br Meteorite Slice, 33.79g, Mirror Polished, UV Fluorescent \u0026 Phosphorescent","description":"\u003ch2\u003eUV-reactive eucrite breccia with mirror polish\u003c\/h2\u003e\n\u003cp\u003eThis mirror-polished eucrite breccia slice exhibits both UV fluorescence and phosphorescence, an unusual optical combination rarely seen in HED meteorites. The 33.79-gram specimen shows a compact basaltic texture under its reflective surface, with the polish enhancing both visual clarity and the intensity of its UV response. When exposed to ultraviolet light, the specimen fluoresces visibly and continues to glow after the light source is removed, adding a distinct display dimension beyond typical polished eucrite material.\u003c\/p\u003e\n\u003cp\u003eThe specimen was classified in 2024 as Eucrite-br, confirming its status as a brecciated basaltic achondrite linked to asteroid Vesta. The mirror finish reveals the fine-grained igneous structure characteristic of eucrites while creating the optical conditions necessary to observe the phosphorescent afterglow clearly. This piece delivers both scientific classification and observable photoluminescent behavior in a single specimen.\u003c\/p\u003e\n\n\u003ch2\u003eBasaltic texture and brecciated structure\u003c\/h2\u003e\n\u003cp\u003eThe polished surface exposes a fine-grained basaltic texture formed through crystallization of melted silicate material on a differentiated parent body. Eucrite breccias form when impact events fracture and re-consolidate igneous eucrite crust, creating a composite structure of angular clasts within a finer matrix. This specimen shows that consolidated character across its polished face, with boundaries between clasts visible under magnification and a cohesive texture that reflects its thermal and impact history.\u003c\/p\u003e\n\u003cp\u003eThe mirror polish eliminates surface roughness and allows light to penetrate the mineral structure efficiently, which contributes to the intensity of the UV response. Unlike rough or natural surfaces that scatter light, the polished finish provides uniform optical access to the fluorescent mineral phases distributed throughout the specimen. The result is a clean, high-contrast display under both visible and UV illumination.\u003c\/p\u003e\n\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eEucrites are basaltic achondrites that crystallized from molten lava flows on the surface of a differentiated asteroid. The HED meteorite group, which includes eucrites, diogenites, and howardites, is linked to asteroid 4 Vesta based on spectroscopic matching and confirmed by data from NASA's Dawn mission. Vesta underwent early planetary differentiation, forming a metallic core, olivine-rich mantle, and basaltic crust during the first few million years of solar system history. Eucrites represent that crustal material, delivered to Earth after impacts excavated fragments from Vesta's surface.\u003c\/p\u003e\n\u003cp\u003eThe UV fluorescence and phosphorescence observed in this specimen likely result from trace mineral phases or shock-induced defects in the crystal lattice. While not all eucrites exhibit these optical properties, their presence in classified HED material provides additional insight into the specimen's mineralogical composition and impact history. For an introduction to meteorite classification and parent bodies, see \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 18452 is officially classified as Eucrite-br in the Meteoritical Bulletin. You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86561\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18452\u003c\/a\u003e. A certificate of authenticity is included with this specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat causes the UV fluorescence and phosphorescence?\u003c\/strong\u003e Fluorescence occurs when UV light excites electrons in certain minerals, causing them to emit visible light. Phosphorescence is the continued glow after the UV source is removed, indicating that excited electrons release energy more slowly. In meteorites, these effects can result from trace elements, shock features, or specific mineral phases. The polished surface maximizes light penetration and enhances the visible intensity of both phenomena.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You will receive the 33.79-gram mirror-polished eucrite slice and a certificate of authenticity confirming its classification. No display stand is included unless separately noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does Eucrite-br mean?\u003c\/strong\u003e Eucrite-br indicates a brecciated eucrite. The specimen consists of eucrite fragments that were broken apart by impact, then lithified into a cohesive rock. This contrasts with unbrecciated eucrites, which retain their original igneous texture without fragmentation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I display this specimen under normal lighting?\u003c\/strong\u003e Yes. The mirror polish provides a reflective, visually appealing surface under standard lighting conditions. The UV fluorescence and phosphorescence are additional features that become visible only when illuminated with a UV light source.\u003c\/p\u003e\n\n\u003ch2\u003eWhy collectors acquire UV-reactive eucrites\u003c\/h2\u003e\n\u003cp\u003eEucrites with observable photoluminescent properties occupy a specific niche in HED collecting. Most polished eucrite slices rely solely on texture and finish for visual appeal, but specimens that fluoresce and phosphoresce under UV light add an interactive display element. Collectors who build UV-reactive meteorite collections value material that combines official classification with clear optical performance, and this specimen delivers both.\u003c\/p\u003e\n\u003cp\u003eThe mirror polish ensures maximum visibility of internal structure while amplifying the UV response. At 33.79 grams, the specimen offers substantial surface area for observation and display without requiring excessive storage space. It functions equally well as a classified HED reference specimen or as a centerpiece in a photoluminescent meteorite display. Browse additional classified HED material in our \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections.\u003c\/p\u003e\n\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86561\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18452\u003c\/a\u003e | Classification: Eucrite-br | Find, Morocco, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45083150450735,"sku":"NWA-18452-33.79G-SLICE-MP","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-18452-eucrite-br-meteorite-slice-33-79g-display.heic?v=1780190379"},{"product_id":"nwa-18048-eucrite-pmict-meteorite-hed-main-mass-1530g","title":"NWA 18048 Eucrite-pmict Meteorite End Cut, 1530.00g, Main Mass, Mixed Clast Structure","description":"\u003ch2\u003eMain mass from a classified polymict eucrite\u003c\/h2\u003e\u003cp\u003eThis 1530.00g end cut represents the main mass of NWA 18048, a classified polymict eucrite recovered in Northwest Africa in 2024. The specimen preserves the principal recovered stone from this fall, giving it curatorial significance beyond its scientific classification. The end cut format exposes a fresh internal surface showing the mixed clast structure characteristic of polymict eucrites while maintaining the bulk and physical presence of the original stone.\u003c\/p\u003e\u003cp\u003ePolymict eucrites form through impact processes that mix multiple generations of crustal material on a differentiated parent body. This specimen displays that process through varied clast sizes and compositions distributed through a finer-grained matrix. The exposed face shows the textural complexity that separates polymict eucrites from uniform monomict basaltic types, making this specimen both visually engaging and scientifically informative.\u003c\/p\u003e\u003ch2\u003eClast distribution and matrix structure\u003c\/h2\u003e\u003cp\u003eThe exposed surface reveals distinct eucritic clasts ranging from millimeter to centimeter scale, set within a darker, finer-grained matrix. These clasts represent fragments of earlier basaltic crust that were disrupted, transported, and reassembled through impact gardening on the parent body surface. The matrix consists of comminuted eucritic material and impact melt products that cemented the clasts together during subsequent heating and lithification.\u003c\/p\u003e\u003cp\u003eThe variation in clast size, texture, and boundary sharpness across the specimen reflects multiple impact events rather than a single brecciation episode. Some clast boundaries show clean separation while others grade into the surrounding matrix, indicating different thermal and shock histories for individual fragments. This textural heterogeneity makes polymict eucrites valuable for understanding long-term surface evolution on small differentiated bodies.\u003c\/p\u003e\u003ch2\u003eFormation on a differentiated asteroid\u003c\/h2\u003e\u003cp\u003eEucrites belong to the HED achondrite group and formed through basaltic volcanism on a differentiated parent body, widely linked to asteroid 4 Vesta. NASA's Dawn mission confirmed Vesta's basaltic crust and impact history, providing direct evidence for the connection between HED meteorites and this 525-kilometer-diameter asteroid. Polymict eucrites specifically record the reworking of that crust through impact processes over geological time.\u003c\/p\u003e\u003cp\u003eThe mixed clast assemblage in this specimen represents multiple generations of crustal material, indicating that Vesta's surface underwent repeated impact disruption and reassembly. This process produced a regolith layer composed of brecciated fragments rather than intact bedrock, similar to the lunar highlands but on a body with distinct compositional and thermal history. Understanding these polymict assemblages helps constrain impact flux rates and crustal evolution on differentiated asteroids. Learn more about meteorite types 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 NWA 18048 is classified by the Meteoritical Society as a polymict eucrite. The classification data can be verified through the Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85750\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18048\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does polymict mean in this classification?\u003c\/strong\u003e Polymict indicates the specimen is a breccia containing multiple clast types rather than a single uniform rock. In eucrites, this reflects impact mixing of different crustal fragments on the parent body surface. The \"pmict\" designation distinguishes these mixed specimens from monomict eucrites that preserve uniform basaltic textures.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 1530.00g and includes a certificate of authenticity. No display stand is included with this main mass specimen due to its size and weight.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is this called the main mass?\u003c\/strong\u003e The main mass is the largest single piece recovered from a meteorite fall or find. It represents the principal stone and carries added curatorial significance in collections. Main masses are often retained by institutions or serious collectors because they preserve the bulk and physical integrity of the original meteorite.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should I display a specimen this size?\u003c\/strong\u003e At 1530g, this specimen benefits from a stable horizontal orientation that shows the exposed clast structure. The end cut format provides a natural display face while the opposite surface preserves the original exterior. Custom display solutions work better than standard stands for specimens of this mass.\u003c\/p\u003e\u003ch2\u003eSignificance for HED collectors\u003c\/h2\u003e\u003cp\u003eMain mass specimens occupy a distinct position in meteorite collecting because they represent the anchor piece from a given recovery. When that main mass is also a classified polymict eucrite from the HED suite, it combines curatorial importance with scientifically complex structure. This specimen serves collectors who prioritize both physical scale and scientific content over small representative fragments.\u003c\/p\u003e\u003cp\u003eThe 1530g mass makes this piece suitable for advanced collections where display impact and scientific integrity both matter. The exposed clast structure provides ongoing visual interest rather than presenting as a homogeneous surface, and the polymict classification places it within the broader context of Vestan crustal evolution. Explore more HED specimens in our \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e collection, or view related material in our \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e category.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85750\" target=\"_blank\" rel=\"noopener\"\u003eNWA 18048\u003c\/a\u003e | Classification: Eucrite-pmict | Find, Northwest Africa, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45106621055023,"sku":"NWA18048-1530-MM","price":4500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-18048-polymict-eucrite-main-mass-end-cut-1530g-breccia-texture.heic?v=1779330180"},{"product_id":"nwa-18448-brecciated-eucrite-hed-achondrite-34-20g-full-slice","title":"NWA 18448 Brecciated Eucrite HED Achondrite, 34.20g Full Slice","description":"\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eNWA 18448, a freshly classified brecciated eucrite from Algeria\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis 34.20g full slice is cut from the 900g main mass of NWA 18448, a brecciated eucrite (HED achondrite) recovered from the Saharan region of Algeria and purchased in 2024. The specimen was scientifically classified by Jose Garcia at ADARA Petrography \u0026amp; Curation of Astromaterials in the Canary Islands and approved by the Meteoritical Society Nomenclature Committee on 10 March 2026, with publication scheduled for Meteoritical Bulletin 115. Brian McDonald (IMCA #3323) holds the main mass and authored the working designation BMD 036 during the classification process.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eStructure and features\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe polished face of this 34.20g full slice exposes a well-developed brecciated fabric and, notably, several distinct FeNi metal flecks across the cut surface. The largest is a circular metal-rimmed inclusion that catches direct light and creates a focal point on the slice, with smaller reflective grains scattered through the matrix. Visible metal of this prominence in hand specimen is uncommon for eucrites, where the metal phase is typically minor and finely disseminated; here the accessory metal identified in ADARA's analysis is conspicuous enough to study under direct lighting. The fine-grained clastic matrix carries a diverse clast population that includes dark gray to nearly black pyroxene-rich clasts, cream to yellow-tan feldspathic clasts, and composite mottled fragments. Clast sizes range from sub-millimeter grains up to several millimeters across the cut surface. Hairline fractures with light-colored mineral infill cross portions of the slice, reflecting the low weathering grade noted in the official classification. A portion of the original exterior is preserved along one edge, retaining a reddish-brown weathering surface. The ADARA petrography confirmed the constituent minerals as Ca-rich pyroxene, low-Ca pyroxene, plagioclase, and a silica polymorph, with accessory chromite, troilite, and FeNi metal. Mineral chemistry: low-Ca pyroxene Fs60.8±0.6Wo1.7±0.2 (FeO\/MnO 28 to 30), Ca-pyroxene Fs25.7±0.3Wo44.4±0.3 (FeO\/MnO 27 to 31), and plagioclase An83.4±1.3. The specimen carries a moderate shock stage and a magnetic susceptibility of 3.78 (log χ).\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eDiscovery and provenance\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe 900g single stone was recovered from Algeria and entered the meteorite trade in 2024 through a dealer in Africa. Brian McDonald acquired the main mass and submitted the material to Jose Garcia at ADARA Petrography \u0026amp; Curation of Astromaterials (Calle Dr. Joaquín Artiles, 36, AP 3. Agüimes, 35260, Las Palmas, Canary Islands, Spain) for petrographic and geochemical analysis. The 20.88g type specimen is deposited at the Museo de la Naturaleza y Arqueología (MUNA) in Santa Cruz de Tenerife, Spain. The Meteoritical Society approved the official name \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86559\" target=\"_blank\"\u003eNorthwest Africa 18448\u003c\/a\u003e on 10 March 2026, with the full writeup scheduled for Meteoritical Bulletin 115.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eScientific context\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eEucrites are basaltic igneous rocks that crystallized in the upper crust of a differentiated asteroid parent body. Spectroscopic and isotopic evidence links the \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED achondrite clan\u003c\/a\u003e (howardites, eucrites, and diogenites) to asteroid 4 Vesta, the second-largest body in the main asteroid belt. Brecciated eucrites such as NWA 18448 preserve a record of impact processing on that parent body: an original basaltic lithology was fragmented by surface impacts, then lithified into a coherent rock by subsequent shock and burial. The mineral chemistry reported by ADARA falls within established compositional ranges for eucritic basalts, and the clastic matrix with mineral and lithic clasts is consistent with surface-derived regolith or fragmental breccia formation on the parent body. As of the Meteoritical Society's most recent count, NWA 18448 is 1 of 273 approved brecciated eucrites. For background on meteorite classification and parent bodies, see our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e hub.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat is a brecciated eucrite?\u003c\/strong\u003e A brecciated eucrite is a basaltic meteorite from a differentiated asteroid whose original igneous fabric was fragmented by impacts on the parent body and then re-cemented into a coherent rock. NWA 18448 displays this clast-in-matrix texture throughout the slice.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhere did NWA 18448 come from?\u003c\/strong\u003e The 900g single stone was found in Algeria and purchased in 2024 from a meteorite dealer in Africa. The HED parent body is widely accepted to be asteroid 4 Vesta in the main belt.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWho performed the classification?\u003c\/strong\u003e The petrographic and geochemical analysis was performed by Jose Garcia at ADARA Petrography \u0026amp; Curation of Astromaterials in the Canary Islands, Spain. The 20.88g type specimen is deposited at the Museo de la Naturaleza y Arqueología (MUNA) in Santa Cruz de Tenerife.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eIs this specimen officially recognized?\u003c\/strong\u003e Yes. NWA 18448 was approved by the Meteoritical Society Nomenclature Committee on 10 March 2026 and is published in Meteoritical Bulletin 115. The full entry is searchable in the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86559\" target=\"_blank\"\u003eMeteoritical Bulletin Database\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat does \"full slice\" mean?\u003c\/strong\u003e A full slice is a complete cross-sectional cut taken from one face of the parent stone through to the other, exposing the entire interior fabric in a single continuous plane. It differs from an end cut or a partial slice, both of which preserve less of the cross section.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eCollector significance\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eHED achondrites occupy a central position in serious meteorite collections because they sample the crust of an identified asteroid parent body. A full slice of a recently classified brecciated eucrite gives the collector both a study-grade specimen and a documented entry in the published Meteoritical Bulletin record. The visible accessory metal phase on the polished face gives this specimen unusual visual character for an eucrite and lends itself well to display under direct lighting. The 34.20g weight places NWA 18448 in a display-friendly range suited to both private collections and educational reference. Every specimen ships with IMCA #3323 dealer documentation. The full classification entry for NWA 18448, including geochemistry, petrography, and type specimen deposition, is available at the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=86559\" target=\"_blank\"\u003eMeteoritical Bulletin Database\u003c\/a\u003e (code 86559). Browse related material in our \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45434389626927,"sku":"NWA18448-34.20G-FS","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-18448-brecciated-eucrite-34-20g-white-background.jpg?v=1780807541"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/collections\/nwa-18048-eucrite-polymict-main-mass-end-cut-1530g-full-face.jpg?v=1776654006","url":"https:\/\/www.tcmeteorites.com\/collections\/eucrites.oembed","provider":"Treasure Coast Meteorite Co.","version":"1.0","type":"link"}