{"title":"HED Meteorites","description":"\u003cp\u003eHED meteorites (howardites, eucrites, and diogenites) are a clan of achondrites that all originated from asteroid 4 Vesta, the second largest body in the asteroid belt. They are direct samples of an ancient differentiated planetesimal that preserved a crust, mantle, and impact-mixed surface from the earliest history of the solar system. Unless specifically stated in the listing, specimens in this collection are Meteoritical Bulletin classified.\u003c\/p\u003e\n\n\u003ch2\u003eHow we verify HED meteorites 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\/the-meteoritical-bulletin-explained\"\u003eThe Meteoritical Bulletin Explained\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eThe three HED types\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEucrites\u003c\/strong\u003e are basaltic crustal rocks from Vesta's surface lava flows. They contain pigeonite and plagioclase in fine to medium-grained basaltic textures. Read more: \u003ca href=\"\/collections\/eucrites\"\u003eEucrites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiogenites\u003c\/strong\u003e are coarse-grained orthopyroxenites from deep within Vesta's crust, likely cumulates from a Vestan magma chamber. They preserve information about the early differentiation of small planetary bodies. Read more: \u003ca href=\"\/collections\/diogenites\"\u003eDiogenites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHowardites\u003c\/strong\u003e are polymict breccias that mix eucrite and diogenite material plus rare clasts from impactors. They formed in Vesta's regolith through repeated cratering. Read more: \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do we know HED meteorites come from Vesta?\u003c\/strong\u003e Oxygen isotope ratios, pyroxene compositions, and laboratory reflectance spectra of HED meteorites match the data NASA's Dawn spacecraft collected at Vesta from 2011 to 2012. The match is unambiguous. Read more: \u003ca href=\"\/pages\/what-is-an-achondrite\"\u003eWhat Is an Achondrite?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre HED meteorites magnetic?\u003c\/strong\u003e HED meteorites contain very little metallic iron and are typically not noticeably magnetic. A strongly magnetic specimen labeled as HED should be examined more closely. Read more: \u003ca href=\"\/pages\/are-meteorites-magnetic\"\u003eAre Meteorites Magnetic?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow can I tell an HED meteorite is real?\u003c\/strong\u003e Authentic HED specimens have a Meteoritical Bulletin entry, ship with documentation, and show characteristic mineralogy, texture, or brecciation depending on subtype. 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\u003eWhich HED type is the most collectible?\u003c\/strong\u003e Polished slices of polymict howardites and basaltic eucrites tend to be the most visually striking. Diogenites with large pyroxene crystals are prized by mineral collectors as well as meteorite collectors. 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 HED meteorite 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\/eucrites\"\u003eEucrites\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-17708-howardite-meteorite-slice-38-73g","title":"NWA 17708 Howardite Meteorite Slice, 38.73g, Fusion Crust on 50% Edge, HED Achondrite from Vesta","description":"\u003ch2\u003eFusion crust preservation on a freshly classified howardite\u003c\/h2\u003e\n\u003cp\u003eThis 38.73g slice of NWA 17708 preserves rippling fusion crust along roughly half its perimeter edge, documenting the specimen's atmospheric entry heating. The sanded interior face reveals brecciated texture characteristic of impact-mixed material from asteroid 4 Vesta's regolith. Contrasting lithologies appear as distinct clasts suspended in a fine-grained matrix, representing fragments of both eucritic basalt and diogenitic orthopyroxenite combined by ancient cratering events.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust retention on a slice of this size provides both scientific documentation and visual appeal. Most sliced meteorites lose their exterior surfaces entirely during cutting and preparation, making this partial preservation noteworthy for display purposes.\u003c\/p\u003e\n\u003ch2\u003eBrecciation and mixed lithology structure\u003c\/h2\u003e\n\u003cp\u003eThe polished face displays clear boundaries between eucritic clasts and diogenitic fragments, creating a mosaic texture formed by hypervelocity impacts on Vesta's surface approximately 4.5 billion years ago. The eucritic components represent basaltic crustal material from Vesta's differentiated surface layers, while diogenitic fragments originate from deeper plutonic cumulates rich in orthopyroxene.\u003c\/p\u003e\n\u003cp\u003eThe fine-grained matrix binding these clasts consists of comminuted material from both lithologies, pulverized and mixed during the impact gardening process that dominates airless body surface evolution. This mixing process transformed separate rock types into the polymict breccia now classified as howardite.\u003c\/p\u003e\n\u003ch2\u003eScientific context of Vesta samples\u003c\/h2\u003e\n\u003cp\u003eHowardites belong to the HED achondrite group, confirmed by NASA's Dawn mission as originating from asteroid 4 Vesta, the second-largest object in the main asteroid belt. Vesta underwent complete differentiation early in solar system history, developing a metallic core, ultramafic mantle, and basaltic crust similar to terrestrial planets despite its relatively small diameter of 525 kilometers.\u003c\/p\u003e\n\u003cp\u003eThe howardite classification indicates this specimen formed through surface regolith processes rather than igneous crystallization. Impacts excavated material from various depths across Vesta's stratigraphy, mixing crustal eucrites with mantle diogenites to create the brecciated assemblage now found in NWA 17708. Studying these mixed samples helps planetary scientists reconstruct both Vesta's internal structure and its 4.5-billion-year impact history. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on achondrite formation and classification.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17708 received official howardite classification through analysis documented in the Meteoritical Bulletin. The classification confirms its composition as a polymict breccia of eucritic and diogenitic material consistent with Vesta origin. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co. verifying its classification and provenance. Reference: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85493\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e in the Meteoritical Bulletin Database.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the fusion crust preservation indicate?\u003c\/strong\u003e Fusion crust forms during atmospheric entry when aerodynamic heating melts the meteorite's exterior surface, creating a thin glassy rind. The rippling texture visible on this specimen's edge indicates the surface experienced differential heating or ablation during its descent through Earth's atmosphere. Most slices lose all fusion crust during cutting, making this 50% edge coverage significant for both scientific documentation and aesthetic presentation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 38.73g NWA 17708 howardite slice, certificate of authenticity from Treasure Coast Meteorite Co., custom specimen card with classification details, and protective display case. No acrylic stand is included with this specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does howardite differ from eucrite and diogenite?\u003c\/strong\u003e Eucrites are basaltic achondrites representing Vesta's crustal material, while diogenites consist of coarse-grained orthopyroxenite from deeper plutonic layers. Howardites are polymict breccias containing fragments of both lithologies mixed by surface impacts, making them distinct from the monomict eucrite and diogenite classifications despite sharing the same parent body.\u003c\/p\u003e\n\u003ch2\u003eDisplay-worthy HED specimen for Vesta collections\u003c\/h2\u003e\n\u003cp\u003eAt 38.73g, this slice provides substantial size for cabinet display while maintaining affordability compared to larger HED specimens. The combination of visible brecciation texture, partial fusion crust preservation, and fresh classification makes NWA 17708 particularly suitable for collectors building representative asteroid sample suites.\u003c\/p\u003e\n\u003cp\u003eThe newly classified status adds research interest, as material from 2024 finds often receives detailed analytical attention from the meteoritical community. Collectors focusing on \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e will find this specimen complements eucrite and diogenite samples by documenting the surface mixing processes that created Vesta's regolith layer. The fusion crust component adds visual distinction compared to fully polished slices, while the sanded face allows clear examination of the brecciated internal structure.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85493\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44724213481519,"sku":"NWA-17708-38.73G-INDIVIDUAL","price":380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17708-howardite-meteorite-slice-38-73g-with-coa.heic?v=1779329316"},{"product_id":"nwa-17708-howardite-meteorite-individual-36-92g","title":"NWA 17708 Howardite Meteorite Individual, 36.92g, Fresh Fusion Crust, HED Achondrite from Vesta","description":"\u003ch2\u003eRippling fusion crust preserved across half the surface\u003c\/h2\u003e\n\u003cp\u003eThis 36.92g individual preserves approximately 50% original fusion crust across its edges, showing the rippled texture characteristic of atmospheric entry heating. One face has been sanded to reveal the internal brecciated structure, a mosaic of light eucritic fragments and darker diogenitic material locked in a fine-grained matrix. The contrast between the black glassy fusion crust and the exposed interior brecciation makes this specimen particularly effective for display and study.\u003c\/p\u003e\n\u003cp\u003eClassified in 2024 from a find in Mali, this howardite represents impact-mixed material from the surface of asteroid 4 Vesta. The specimen displays clear lithologic boundaries between clast types, demonstrating the violent impact processes that created the howardite regolith breccia on Vesta's crust.\u003c\/p\u003e\n\u003ch2\u003eBrecciated texture reveals impact mixing\u003c\/h2\u003e\n\u003cp\u003eThe sanded face exposes angular clasts of contrasting composition embedded throughout the matrix. Eucritic fragments appear lighter in tone, while diogenitic material shows darker grays. This heterogeneous texture formed when asteroidal impacts on Vesta's surface excavated and mixed material from both the basaltic crust (eucrites) and the deeper orthopyroxene-rich cumulates (diogenites), then lithified the mixture through subsequent impact compression.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust exhibits the glossy black appearance and flow textures typical of atmospheric ablation. These surface features formed during the meteorite's deceleration through Earth's atmosphere, when frictional heating melted the outer layer into glass. The preservation of roughly half the original crust indicates minimal terrestrial weathering since the fall.\u003c\/p\u003e\n\u003ch2\u003eScientific context: asteroid Vesta's impact history\u003c\/h2\u003e\n\u003cp\u003eHowardites belong to the HED achondrite group, howardites, eucrites, and diogenites, all confirmed by NASA's Dawn mission spacecraft data to originate from asteroid 4 Vesta, the second-largest object in the asteroid belt. Vesta is one of only a few asteroids large enough to have differentiated into a core, mantle, and crust during the early solar system. Eucrites represent Vesta's basaltic crust, diogenites come from the deeper orthopyroxenite cumulate layers, and howardites are impact breccias mixing both lithologies.\u003c\/p\u003e\n\u003cp\u003eThe brecciated nature of howardites records Vesta's violent collisional history. Large impacts fractured and excavated material from different crustal depths, mixed the fragments, then compacted them into coherent breccias through subsequent impacts. Study of howardites provides direct evidence of impact gardening processes on differentiated asteroids. For more on meteorite classification systems and how scientists identify parent bodies, 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 NWA 17708 is officially classified as a howardite in the Meteoritical Bulletin Database. You can verify the classification here: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85493\" target=\"_blank\"\u003eNWA 17708\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 howardite mean?\u003c\/strong\u003e Howardites are polymict breccias, rocks composed of fragments from multiple source materials, containing both eucritic (basaltic) and diogenitic (orthopyroxenite) clasts from different depths within asteroid Vesta's crust. The mixing occurred through impact processes on Vesta's surface. Howardites are rarer than eucrites and diogenites individually.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 36.92g NWA 17708 individual, certificate of authenticity from Treasure Coast Meteorite Co., custom specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do howardites differ from eucrites?\u003c\/strong\u003e Eucrites are monomict basaltic achondrites representing Vesta's volcanic crust, while howardites are polymict impact breccias containing clasts of both eucrite and diogenite mixed together. Howardites typically show visible heterogeneity with contrasting clast types in a single specimen, whereas eucrites display more uniform basaltic texture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the fusion crust significant?\u003c\/strong\u003e Fusion crust forms only during atmospheric entry and degrades rapidly through weathering in most terrestrial environments. The preservation of approximately 50% original crust on this specimen indicates minimal time on the ground before recovery and suggests the find occurred in an arid environment favorable for meteorite preservation.\u003c\/p\u003e\n\u003ch2\u003eDisplay-ready specimen documenting Vesta's impact history\u003c\/h2\u003e\n\u003cp\u003eAt 36.92g, this individual provides substantial mass for both display and study. The combination of preserved fusion crust and exposed brecciated interior in a single specimen allows direct comparison of surface and internal features. The sanded face clearly shows the polymict texture that defines howardites, while the fusion crust documents the specimen's journey through Earth's atmosphere.\u003c\/p\u003e\n\u003cp\u003eHowardites represent less than 15% of witnessed falls among the HED achondrite group, making them significantly less common than eucrites. This specimen's fresh appearance and dual-feature presentation, both exterior crust and interior texture visible, makes it particularly suitable for educational collections and institutions. The 2024 classification provides modern analytical data and documentation. Explore more specimens from asteroid Vesta in our \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\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=85493\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732226273327,"sku":"NWA-17708-36.92G-INDIVIDUAL","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17708-howardite-meteorite-individual-36-92g-full-view.heic?v=1779330103"},{"product_id":"nwa-17708-howardite-meteorite-slice-35-21g","title":"NWA 17708 Howardite Meteorite Slice, 35.21g, Fresh Fusion Crust on 50% Edge","description":"\u003ch2\u003eFresh fusion crust preserved on impact-mixed achondrite\u003c\/h2\u003e\n\u003cp\u003eThis 35.21g howardite slice from NWA 17708 preserves fresh black fusion crust across approximately 50% of its edge surface. The rippled texture of the crust formed during atmospheric entry as the surface melted and ablated. One face has been sanded to reveal the internal brecciated structure, a mosaic of angular clasts from different source rocks cemented together by impact processes on asteroid 4 Vesta's surface.\u003c\/p\u003e\n\u003cp\u003eThe contrasting lithologies visible within the matrix represent fragments of both eucritic basalt and diogenitic orthopyroxenite, the two rock types that dominate Vesta's crust and upper mantle. This mixing occurred during violent collisions that excavated material from different depths and welded it together. The specimen offers a cross-section view: fusion crust on the exterior, fragmented interior structure revealed by cutting.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe sanded face exposes the characteristic brecciated texture that defines howardites. Angular clasts of varying sizes sit suspended in a fine-grained matrix. Some clasts appear darker and more crystalline, likely eucritic material rich in plagioclase and pyroxene. Lighter regions may represent diogenitic fragments dominated by orthopyroxene crystals. The heterogeneous appearance reflects the chaotic mixing process that created this rock.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust retains its original black glassy texture with subtle flow lines and ripples. This preservation indicates minimal weathering since the fall. The slice format provides both display value, the contrast between dark crust and lighter interior, and scientific accessibility to the internal structure. Magnetism is very weak to absent, consistent with the non-metallic composition of HED achondrites.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eHowardites form exclusively on asteroid 4 Vesta, the second-largest object in the main asteroid belt. Unlike \u003ca href=\"\/pages\/learn-about-meteorites\"\u003emost meteorites\u003c\/a\u003e, which sample primitive material from the early solar system, howardites represent evolved crustal rocks from a differentiated world. Vesta underwent complete melting and separation into core, mantle, and crust within the first few million years of solar system history. The HED meteorite group, howardites, eucrites, and diogenites, samples this differentiated structure.\u003c\/p\u003e\n\u003cp\u003eHowardites specifically record the impact gardening process on Vesta's surface. Repeated collisions over billions of years excavated material from different crustal depths, mixed it together, and lithified it through shock compression. Each howardite is a unique blend ratio of eucrite and diogenite, making them individually distinct records of Vesta's impact history. NASA's Dawn spacecraft confirmed the Vesta connection through direct surface observations between 2011 and 2012, matching spectral signatures between the asteroid and HED meteorites.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17708 is officially classified as a howardite in the Meteoritical Bulletin: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85493\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co. verifying its classification and origin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does brecciated mean?\u003c\/strong\u003e Brecciated texture indicates the rock formed from broken fragments of pre-existing rocks that were cemented together. In howardites, these fragments come from different depths in Vesta's crust, eucritic basalts from the surface and diogenitic orthopyroxenites from deeper layers, mixed by impact events and compressed into a new rock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 35.21g NWA 17708 slice, certificate of authenticity, specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy doesn't this meteorite attract a magnet?\u003c\/strong\u003e HED achondrites contain little to no metallic iron, unlike chondrites or iron meteorites. Vesta differentiated early in solar system history, and metal sank to the core. The crustal rocks we sample as HED meteorites consist primarily of silicate minerals, plagioclase feldspar and pyroxene, which are non-magnetic.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eThis specimen offers collectors direct access to a classified achondrite from a known planetary body at an accessible size and price point. The preserved fusion crust adds display appeal while the sanded interior face provides clear visibility of the brecciated structure. At 35.21g, the slice is substantial enough for detailed examination without requiring specialized equipment.\u003c\/p\u003e\n\u003cp\u003eNWA 17708 was recovered in 2024, making it among the most recently classified Vesta samples available to private collectors. The combination of fresh fusion crust and exposed interior structure makes this slice particularly versatile for both aesthetic display and educational use. Collectors building \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED meteorite\u003c\/a\u003e reference sets will find this howardite complements eucrite and diogenite specimens by demonstrating the impact mixing process that occurred on Vesta's surface. The specimen ships ready for display in its included protective case.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=85493\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732230172719,"sku":"NWA-17708-35.21G-INDIVIDUAL","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17708-howardite-slice-35-21g-with-coa-card.heic?v=1779330735"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-21-31g","title":"NWA 17708 Howardite Meteorite Part Slice, 21.31g, 50% Fresh Fusion Crust","description":"\u003ch2\u003eFresh fusion crust preserves half the edge of this Vesta fragment\u003c\/h2\u003e\u003cp\u003eThis 21.31g part slice of NWA 17708 displays approximately 50% coverage of fresh, rippled fusion crust along its edge surfaces. One face shows sanded texture revealing the internal brecciated structure, while the natural exterior preserves the thermal scarring from atmospheric entry. The specimen form factor balances structural detail with display presence.\u003c\/p\u003e\u003cp\u003eHowardites represent surface regolith from asteroid 4 Vesta, formed through impact gardening that physically mixed eucritic basalts with deeper diogenitic orthopyroxenites. This specimen exhibits visible lithic clasts of contrasting composition embedded in a fine-grained matrix. The fusion crust retention on a part slice is notable, as most cutting operations remove atmospheric ablation features entirely.\u003c\/p\u003e\u003ch2\u003eBrecciation and lithic heterogeneity\u003c\/h2\u003e\u003cp\u003eThe sanded face reveals polymict texture characteristic of regolith breccias. Light and dark clasts ranging from submillimeter to several millimeters appear throughout the matrix, representing fragments of both eucritic and diogenitic parent lithologies. These angular to subangular fragments show sharp boundaries against the finer groundmass.\u003c\/p\u003e\u003cp\u003eThe preserved fusion crust displays rippled flow textures formed during hypersonic atmospheric passage. This thin glassy rind marks the original exterior surface of the meteoroid before terrestrial recovery. Fusion crust on achondrites typically appears darker and more vitreous than on chondrites due to the crystalline nature of the pre-entry rock.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eNWA 17708 belongs to the howardite-eucrite-diogenite (HED) clan, a suite of achondrites linked to asteroid 4 Vesta through spectroscopic matching and data from NASA's Dawn mission. Howardites specifically sample Vesta's impact-processed regolith rather than coherent crustal or mantle units. Impact events on Vesta's surface excavated both basaltic eucrites from the crust and orthopyroxene-rich diogenites from deeper layers, mixing them mechanically into breccias.\u003c\/p\u003e\u003cp\u003eVesta differentiated early in solar system history, developing a metallic core, ultramafic mantle, and basaltic crust within the first few million years after CAI formation. Howardites preserve a record of this differentiation through their mixed composition, and they document the intense collisional environment of the main asteroid belt. Learn more about meteorite classification and planetary science 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 17708 is classified as a howardite in the Meteoritical Bulletin Database. You can verify this classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin: NWA 17708\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does howardite mean?\u003c\/strong\u003e Howardites are polymict breccias containing fragments of both eucrite (basaltic) and diogenite (orthopyroxenitic) lithologies. They represent regolith from asteroid Vesta's surface, mechanically mixed by impact cratering rather than formed through igneous processes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does this achondrite have such weak magnetism?\u003c\/strong\u003e HED achondrites crystallized from differentiated magma on Vesta and contain minimal metallic iron-nickel. Unlike chondrites, which preserve metal grains from the solar nebula, differentiated asteroids sequestered their metal into cores. The silicate minerals in howardites are essentially non-magnetic.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 21.31g NWA 17708 part slice, certificate of authenticity, custom specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\u003ch2\u003eWhy collectors value howardites\u003c\/h2\u003e\u003cp\u003eHowardites occupy a select position in collections due to their confirmed asteroidal origin and their representation of surface processes on a differentiated body. While eucrites and diogenites sample Vesta's interior structure, howardites capture the dynamic surface environment shaped by billions of years of impacts. The preservation of fusion crust on this part slice adds terrestrial fall context to the specimen's asteroidal history.\u003c\/p\u003e\u003cp\u003eAt 21.31g, this piece offers substantial hand presence while remaining accessible for focused HED collections. The mixed lithology visible in the sanded face provides educational value for understanding impact mixing and regolith formation on airless bodies. Collectors building comprehensive \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e suites or \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e specifically will find this recently classified material represents 2024 recovery efforts in Mali.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732243410991,"sku":"NWA-17708-21.31G-INDIVIDUAL","price":210.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6617.heic?v=1764781497"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-26-23g","title":"NWA 17708 Howardite Meteorite Slice, 26.23g, Rippled Fusion Crust on 50% Edge","description":"\u003ch2\u003eRippled fusion crust and impact brecciation from Vesta\u003c\/h2\u003e\n\u003cp\u003eThis 26.23g howardite slice preserves rippled fusion crust along approximately 50% of its edge surface, documenting atmospheric entry heating from the 2024 Mali recovery. One face shows sanded texture revealing the internal brecciated structure characteristic of howardite composition. The slice displays clasts of contrasting lithologies embedded in a fine-grained matrix, physical evidence of impact mixing between eucritic basaltic material and diogenitic orthopyroxene on Vesta's surface.\u003c\/p\u003e\n\u003cp\u003eThe specimen measures large enough to observe the relationship between dark eucritic fragments and lighter diogenitic components under magnification. Surface contrast between the rippled fusion crust and the sanded interior face provides clear visualization of both exterior heating effects and interior mechanical mixing processes.\u003c\/p\u003e\n\u003ch2\u003eBrecciated structure and weak magnetic signature\u003c\/h2\u003e\n\u003cp\u003eThe slice exhibits polymict brecciation with angular clasts ranging from submillimeter to several millimeters embedded in a comminuted matrix. This texture results from repeated impact gardening of Vesta's regolith, mechanically mixing debris from both the upper basaltic crust and deeper orthopyroxenite layers. The howardite composition shows very weak to non-existent magnetic response, consistent with HED achondrites formed in an oxidized environment lacking metallic iron.\u003c\/p\u003e\n\u003cp\u003eThe sanded face reveals grain boundaries and clast margins where eucritic and diogenitic components meet. Fusion crust rippling along the edge indicates stable orientation during atmospheric passage, with aerodynamic heating creating wavelike surface texture before the meteoroid fragmented.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eHowardites form the brecciated component of the HED meteorite suite, which NASA's Dawn mission confirmed originated from asteroid 4 Vesta through spectroscopic matching in 2011-2012. These meteorites sample both the basaltic crust and ultramafic mantle of a differentiated protoplanet that survived intact from the solar system's first 10 million years. Impact events on Vesta excavated deep craters, mixing surface basalts with mantle orthopyroxenites and ejecting the combined debris into Earth-crossing orbits.\u003c\/p\u003e\n\u003cp\u003eNWA 17708 represents material from Vesta's regolith layer, where billions of years of impacts mechanically processed crustal and mantle fragments into the polymict breccia now classified as howardite. The specimen provides direct access to protoplanetary differentiation processes that operated when planets were still forming. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e for broader context on achondrite formation and classification systems.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17708 received official howardite classification through the Meteoritical Society's review process. The Meteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e documents the classification details. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does polymict brecciation mean?\u003c\/strong\u003e Polymict indicates the breccia contains fragments from multiple distinct rock types, in this case, both eucritic basalt and diogenitic orthopyroxenite. These components mixed mechanically through impact processes on Vesta's surface rather than melting together, preserving individual clast identities within the matrix.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 26.23g howardite slice, certificate of authenticity from Treasure Coast Meteorite Co., custom specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does the fusion crust have ripples?\u003c\/strong\u003e Rippled or wavelike fusion crust texture forms when a meteoroid maintains stable orientation during atmospheric entry. Aerodynamic heating creates surface flow patterns in the melted exterior before the meteoroid breaks apart, freezing the ripple pattern as the crust rapidly cools.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eHowardites represent less than 8% of all classified meteorite falls, making them substantially less common than ordinary chondrites or iron meteorites. This specimen combines display-quality size at 26.23g with preserved fusion crust, providing both scientific interest and visual appeal. The sanded face allows direct observation of the brecciated interior structure, while the natural fusion-crusted edge documents atmospheric entry processes.\u003c\/p\u003e\n\u003cp\u003eNWA 17708 entered the collection market following 2024 recovery in Mali, offering recent classification data and fresh material for collectors building HED suites. The specimen serves both as a Vesta sample and as documentation of regolith processes on differentiated asteroids. Browse additional confirmed Vesta material in our \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e collection and explore related specimens in the \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e category.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732247277615,"sku":"NWA-17708-26.23G-INDIVIDUAL","price":260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6620.heic?v=1764781685"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-34-51g","title":"NWA 17708 Howardite Meteorite Slice, 34.51g, Rippled Fusion Crust, HED Achondrite from Vesta","description":"\u003ch2\u003eFresh fusion crust with rippling flow texture\u003c\/h2\u003e\u003cp\u003eThis 34.51g slice of NWA 17708 preserves approximately 50% fresh fusion crust along its edge, displaying the characteristic rippling flow texture formed as molten surface material solidified during atmospheric entry. The sanded face reveals the heterogeneous interior structure typical of howardites, with visible clasts of contrasting lithologies set within a fine-grained impact-generated matrix. The fusion crust coverage and texture make this specimen particularly suitable for display and study of atmospheric heating effects on asteroidal material.\u003c\/p\u003e\u003cp\u003eThe slice format provides direct visual access to both the external fusion crust and internal brecciated structure in a single specimen. The contrast between the dark, glassy fusion crust and the lighter interior lithologies demonstrates the thermal gradient experienced during atmospheric passage. This specimen shows the regolith breccia nature of howardites, recording multiple impact events on the surface of asteroid 4 Vesta.\u003c\/p\u003e\u003ch2\u003eBrecciated structure and impact mixing\u003c\/h2\u003e\u003cp\u003eThe sanded surface reveals the polymict nature of this howardite, showing clasts of varying composition embedded within the matrix. These clasts represent fragments of both eucrites and diogenites, the two other members of the HED clan, physically mixed by impact gardening processes on Vesta's surface. The fine-grained matrix filling the spaces between clasts formed from comminuted rock and impact melt during the collisions that created this material.\u003c\/p\u003e\u003cp\u003eHowardites exhibit very weak to no magnetic attraction, consistent with their composition dominated by pyroxene and plagioclase minerals rather than metallic iron-nickel. This lack of magnetism distinguishes them from chondrites and iron meteorites, reflecting the differentiated nature of their parent body. The specimen shows the textural complexity that results from billions of years of impact processing in the asteroid belt.\u003c\/p\u003e\u003ch2\u003eScientific context: Vesta's regolith breccias\u003c\/h2\u003e\u003cp\u003eHowardites represent the regolith layer of asteroid 4 Vesta, formed by repeated meteoroid impacts that mixed and brecciated material from deeper crustal layers. NASA's Dawn spacecraft mission confirmed the HED-Vesta connection through spectroscopic analysis and direct imaging of Vesta's surface between 2011 and 2012, verifying what meteorite researchers had proposed for decades based on compositional studies. Howardites specifically sample the impact-processed surface layer where eucritic basalts and diogenitic orthopyroxenites were physically combined.\u003c\/p\u003e\u003cp\u003eThe formation of howardites requires energetic impact events sufficient to excavate material from different crustal depths and mix them together. This process creates the heterogeneous texture visible in NWA 17708, recording the collisional history of the asteroid belt's second-largest body. Howardites provide direct samples of a planetary surface shaped by 4.5 billion years of bombardment. \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 NWA 17708 is classified as a howardite in the Meteoritical Bulletin Database. Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e. Every specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does howardite mean?\u003c\/strong\u003e Howardites are polymict breccias composed of mixed fragments of eucrites and diogenites, the other two members of the HED achondrite group. They formed in the regolith layer of asteroid 4 Vesta through impact mixing processes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 34.51g NWA 17708 slice, certificate of authenticity, specimen card with classification details, and gembox display case.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does this meteorite have fusion crust on only part of its surface?\u003c\/strong\u003e This specimen is a cut slice taken from a larger individual. The fusion crust visible on approximately 50% of the edge represents the original exterior surface of the meteorite, while the sanded face exposes the interior structure for study and display.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat makes NWA 17708 significant?\u003c\/strong\u003e Classified in 2024, NWA 17708 is among the most recently recognized howardites available to collectors. It provides fresh material from Vesta's surface with excellent preservation of both fusion crust and interior brecciated texture.\u003c\/p\u003e\u003ch2\u003eDisplay-ready specimen from Vesta\u003c\/h2\u003e\u003cp\u003eThe combination of fresh fusion crust and prepared interior surface makes this slice well-suited for display and educational purposes. At 34.51g, the specimen provides substantial visual impact while remaining practical for handling and storage. The visible brecciation demonstrates the impact processes that shaped the surface of a differentiated asteroid, offering direct evidence of regolith formation in the asteroid belt.\u003c\/p\u003e\u003cp\u003eHowardites remain relatively scarce in meteorite collections compared to chondrites, representing less than 5% of all recovered meteorite falls and finds. The material from asteroid 4 Vesta provides samples of a planetary body that survived intact from the early solar system, avoiding the complete disruption that scattered the material from many other differentiated asteroids. This specimen joins a collection representing confirmed samples from one of the largest intact protoplanets. \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e\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%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732262678575,"sku":"NWA-17708-34.51G-INDIVIDUAL","price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6623.heic?v=1764782045"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-29-12g","title":"NWA 17708 Howardite Meteorite End Cut, 29.12g, 50% Fusion Crust Coverage","description":"\u003ch2\u003eEnd cut preserving extensive fusion crust\u003c\/h2\u003e\n\u003cp\u003eThis 29.12g end cut of NWA 17708 retains approximately 50% fusion crust coverage along its edge surface, exhibiting the rippled, flow-textured exterior that formed during atmospheric entry. The sanded interior face reveals the brecciated nature of howardite material: angular clasts of contrasting composition set within a fine-grained matrix. The fusion crust transitions sharply to the interior, providing a clear cross-section of the meteorite's exterior shell and internal structure.\u003c\/p\u003e\n\u003cp\u003eEnd cuts occupy a specific position in meteorite preparation. They preserve the complete profile from fusion crust through to interior while allowing one polished or sanded face for examination of internal features. This specimen balances both aspects: the weathered exterior documents atmospheric flight, while the prepared face exposes the mixed lithology characteristic of Vestan regolith breccias.\u003c\/p\u003e\n\u003ch2\u003eBrecciated texture and mixed clasts\u003c\/h2\u003e\n\u003cp\u003eThe interior face shows the heterogeneous structure that defines howardites. Light and dark clasts of varying size interrupt the matrix, representing fragments of both eucritic basalt and diogenitic orthopyroxenite. These components derive from different depths within Vesta's crust: eucrites from surface lava flows, diogenites from plutonic intrusions deeper in the crust. Impact events mixed these materials at the asteroid's surface, creating the polymict breccia now classified as howardite.\u003c\/p\u003e\n\u003cp\u003eClast boundaries are visible where compositional differences create subtle color and textural contrasts. The matrix between clasts consists of finer comminuted material from the same parent lithologies. This mechanical mixing occurred through repeated impact gardening of Vesta's regolith over billions of years, with each collision fragmenting, ejecting, and redepositing surface material.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eNWA 17708 originated from asteroid 4 Vesta, the second-largest body in the main asteroid belt and the only differentiated asteroid confirmed as a meteorite source through spacecraft observation. NASA's Dawn mission mapped Vesta from 2011 to 2012, matching surface spectroscopy to laboratory analysis of HED meteorites and confirming the connection between howardites, eucrites, diogenites, and this specific parent body.\u003c\/p\u003e\n\u003cp\u003eHowardites represent Vesta's surface regolith, the impact-processed layer that accumulated over the asteroid's 4.5-billion-year history. Giant impacts, including the formation of the Rheasilvia basin near Vesta's south pole, excavated deep crustal material and launched fragments into space. Some of these fragments eventually reached Earth-crossing orbits and fell as meteorites. NWA 17708 was recovered in Mali in 2024 and classified as a howardite based on its mixed mineralogy and texture. For broader context on meteorite identification and classification, 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 17708 is classified as a howardite by the Meteoritical Society and recorded in the Meteoritical Bulletin Database. You can verify the classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin: NWA 17708\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is an end cut?\u003c\/strong\u003e An end cut is a slice removed from the edge of a meteorite mass, preserving the fusion crust on one side while exposing the interior on the cut face. This format shows both the exterior formed during atmospheric entry and the internal structure, making it valuable for display and study. The sanded face on this specimen allows clear observation of the brecciated texture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does this howardite show weak or no magnetism?\u003c\/strong\u003e Howardites consist primarily of pyroxene and plagioclase feldspar with minimal metal content, typically less than 1%. The parent lithologies, eucrites and diogenites, formed in an oxygen-rich environment within Vesta's crust, preventing metallic iron from crystallizing. Without significant metal, howardites exhibit very weak magnetic response, distinguishing them from chondrites and iron meteorites.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 29.12g NWA 17708 end cut, certificate of authenticity, specimen card with classification details, and protective display case. No stand is included.\u003c\/p\u003e\n\u003ch2\u003eDisplay-ready specimen with scientific documentation\u003c\/h2\u003e\n\u003cp\u003eAt 29.12g, this end cut provides substantial presence for collection display while remaining accessible for researchers interested in HED achondrite samples. The preserved fusion crust makes the specimen immediately recognizable as a meteorite, while the sanded interior allows examination of the brecciated texture without requiring additional preparation. The combination of exterior preservation and interior exposure serves both aesthetic and educational purposes.\u003c\/p\u003e\n\u003cp\u003eHowardites represent less than 5% of all meteorite falls, making them significantly less common than ordinary chondrites. Recently classified specimens like NWA 17708 expand the available sample set for collectors building HED suites. This piece fits into broader \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e and \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collections, complementing eucrite and diogenite specimens to represent the full range of Vestan crustal lithologies.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732271951919,"sku":"NWA-17708-29.12G-ENDCUT","price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6626.heic?v=1764782450"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-38-80g","title":"NWA 17708 Howardite Meteorite Slice, 38.80g, Fresh Fusion Crust","description":"\u003ch2\u003eFresh fusion crust preserved across half the surface\u003c\/h2\u003e\u003cp\u003eThis 38.80g sanded slice preserves rippling fusion crust across approximately 50% of its edge surface. The crust formed during atmospheric entry when surface material melted and resolidified, creating the characteristic flowing texture visible along the perimeter. One face was sanded to reveal the internal structure while leaving the exterior edge untouched, maintaining the specimen's field presentation. The contrast between worked interior and preserved crust makes this slice both scientifically informative and visually compelling.\u003c\/p\u003e\u003cp\u003eThe breccia texture remains visible through the sanded surface. Clasts of varying lithologies appear embedded in the matrix, representing impact-mixed materials from different depths within Vesta's crust. This combination of preserved exterior and exposed interior demonstrates the full character of the meteorite from atmospheric passage to subsurface composition.\u003c\/p\u003e\u003ch2\u003eBrecciated structure from asteroid impact events\u003c\/h2\u003e\u003cp\u003eThe slice displays the heterogeneous texture characteristic of howardites. Clasts of contrasting composition and grain size appear distributed throughout a finer-grained matrix. These clasts represent fragments of both eucritic basalt and diogenitic orthopyroxenite that were mixed during impact events on Vesta's surface. The boundary between clast and matrix remains visible in many areas, particularly where compositional differences create tonal contrast under standard lighting.\u003c\/p\u003e\u003cp\u003eHowardites exhibit very weak magnetic properties due to their low metallic iron content. This specimen demonstrates the expected response, barely interacting with a magnet. The lack of strong magnetism distinguishes howardites from chondritic meteorites and confirms the differentiated origin from a body that underwent complete melting and chemical separation.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eNWA 17708 belongs to the howardite-eucrite-diogenite (HED) clan, a group of achondrites confirmed by NASA's Dawn spacecraft to originate from asteroid 4 Vesta. Howardites formed when high-velocity impacts on Vesta's surface excavated and mixed material from the eucritic basaltic crust and the underlying diogenitic orthopyroxenite mantle. The resulting regolith breccias were then lithified through subsequent impacts or burial, creating the mixed-lithology rocks we recover as howardites.\u003c\/p\u003e\u003cp\u003eVesta represents one of the few intact protoplanets remaining from the solar system's first few million years. Its differentiated structure provides direct evidence of early planetary formation processes that would have been common among rocky bodies before most were destroyed or incorporated into larger planets. Howardites sample multiple crustal layers in a single specimen, offering a cross-section of an ancient planetary interior. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how classification systems distinguish these achondrites from other meteorite types.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17708 is classified as a howardite in the Meteoritical Bulletin database. Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024. A certificate of authenticity from Treasure Coast Meteorite Co. is included with this specimen, documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the fusion crust tell us about atmospheric entry?\u003c\/strong\u003e The rippling texture on this specimen's crust formed when the meteoroid's surface melted during atmospheric deceleration, with the flowing pattern frozen in place as the object cooled. The preservation of approximately 50% original crust indicates this piece likely came from near the exterior of a larger mass that fragmented during entry or upon impact with the ground.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is Vesta significant to planetary science?\u003c\/strong\u003e Vesta is the only known intact protoplanet accessible through meteorites. Its differentiated structure formed within the first few million years of solar system history when radioactive decay provided enough heat to melt the interior completely. Most other bodies of this type were destroyed in collisions or incorporated into Earth and other planets, making Vesta-derived meteorites our only samples of this early planetary stage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 38.80g slice, certificate of authenticity from Treasure Coast Meteorite Co., custom specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eHowardites comprise only about 8% of all HED meteorites recovered, making them notably less common than eucrites in collections. NWA 17708 was classified in 2024, making it among the most recently studied howardites available. The preserved fusion crust on this specimen adds exterior context that fully prepared slices lack, showing both the meteorite's journey through Earth's atmosphere and its internal structure in one piece.\u003c\/p\u003e\u003cp\u003eAt 38.80g, this slice falls into the display-weight category that works well for educational contexts or personal collections. The sanded face reveals structural details while the preserved edge maintains field character. The combination of recent classification, substantial size, and dual presentation makes this specimen accessible to collectors building comprehensive \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e reference sets or those seeking a first piece from Vesta with both interior and exterior features visible.\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732289515567,"sku":"NWA-17708-38.80G-INDIVIDUAL","price":380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6630.heic?v=1764782858"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-350-42g-large-end-cut","title":"NWA 17708 Howardite Meteorite End Cut, 350.42g, Fresh Fusion Crust, HED Achondrite from Vesta","description":"\u003ch2\u003eLarge end cut with extensive fusion crust coverage\u003c\/h2\u003e\n\u003cp\u003eThis 350.42g end cut preserves approximately half its surface area in fresh, rippled fusion crust ,  the black glassy coating formed during atmospheric entry. One face shows the sanded interior, revealing the brecciated texture characteristic of howardites: angular clasts of varied lithologies suspended in a fine-grained matrix. The size and condition of this piece make it suitable for further sectioning, with potential for multiple thinner slices while retaining a substantial core specimen. The fusion crust exhibits the flow patterns and thermal texture that formed as the meteorite decelerated through Earth's atmosphere.\u003c\/p\u003e\n\u003cp\u003eClassified in 2024 from a find in Mali, NWA 17708 represents a recent addition to the howardite group. The sanded face provides clear visibility of the internal structure, while the natural exterior documents the meteorite's passage through the atmosphere. At over 350 grams, this specimen offers both display presence and scientific utility for collectors interested in asteroid sample material.\u003c\/p\u003e\n\u003ch2\u003eBrecciation and lithologic mixing\u003c\/h2\u003e\n\u003cp\u003eThe interior shows the chaotic mixing of eucritic and diogenitic components that defines howardites. Light-colored clasts contrast against darker matrix material, documenting the impact processes that excavated and combined different crustal layers on Vesta's surface. The clast boundaries remain sharp in many areas, indicating that the mixing occurred without complete melting ,  a cold brecciation process driven by impact shock rather than volcanism.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust displays the characteristic rippled texture formed by differential ablation during atmospheric entry. These flow features record the orientation and velocity of the meteorite as it encountered atmospheric resistance. The crust thickness varies across the surface, thickest where the meteorite presented a blunt profile to the airstream and thinner along more streamlined edges.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eHowardites originate from asteroid 4 Vesta, the second-largest object in the main asteroid belt and the only differentiated asteroid visible to the naked eye from Earth. NASA's Dawn spacecraft confirmed the link between HED meteorites and Vesta through compositional mapping and crater analysis from 2011 to 2012. The spacecraft documented extensive impact cratering in Vesta's southern hemisphere, including the Rheasilvia basin ,  a 500-kilometer impact structure that excavated material from multiple crustal layers and ejected fragments into space.\u003c\/p\u003e\n\u003cp\u003eHowardites represent the impact gardening process on Vesta's surface. Unlike eucrites (volcanic basalts) or diogenites (plutonic cumulates), howardites formed when later impacts pulverized and mixed already-solidified crustal rocks. This mechanical mixing preserved fragments from different geological settings on Vesta: shallow crustal basalts, deeper plutonic rocks, and occasionally material from Vesta's mantle. The brecciated structure in this specimen records the violence of the impact environment on an airless body where ejecta from one crater can travel across the surface and impact elsewhere, creating a complex regolith of mixed fragments. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on achondrite classification and formation processes.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17708 is classified as a howardite in the Meteoritical Bulletin Database. You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does HED mean?\u003c\/strong\u003e HED stands for Howardite-Eucrite-Diogenite, a group of achondrites that originated on asteroid Vesta. Eucrites are volcanic rocks from Vesta's crust, diogenites are plutonic rocks from deeper layers, and howardites are impact breccias that mix both types. All three formed on the same parent body and were delivered to Earth after impact ejection events.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 350.42g end cut, a certificate of authenticity, and a specimen card with classification details. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this piece be sliced further?\u003c\/strong\u003e Yes. The specimen dimensions and mass support additional sectioning. The end cut geometry allows for multiple thinner slices while preserving a substantial remaining mass. The fusion crust coverage means some slices can retain natural exterior surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the magnetism weak in howardites?\u003c\/strong\u003e Howardites contain minimal metallic iron compared to chondrites or iron meteorites. Vesta differentiated early in solar system history, concentrating metal into its core. The crustal rocks that form howardites are silicate-dominated with only trace metal content, resulting in weak or absent magnetic response.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eEnd cuts at this mass scale are less common in the market than smaller slices. The 350.42g weight provides specimen presence while remaining practical for storage and display. The extensive fusion crust coverage adds natural surface morphology that interior slices cannot offer ,  approximately half the exterior retains the black glassy coating and flow patterns from atmospheric entry.\u003c\/p\u003e\n\u003cp\u003eRecent classifications like NWA 17708 enter collections with fresh material and lower circulation than historically significant falls. The 2024 classification date means this specimen comes from newly analyzed material rather than existing museum stocks. For collectors building \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e groups, howardites complete the triad alongside eucrites and diogenites, representing the mixed surface regolith that forms from impact processes. The size of this piece makes it suitable for institutional collections or as an anchor specimen in private collections focused on asteroid material. The potential for further sectioning adds utility for collectors interested in paired specimens or serial sections for comparative display.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44732306194479,"sku":"NWA-17708-350.42G-ENDCUT","price":2750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6635.heic?v=1779331737"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-4-24g","title":"NWA 17708 Howardite Meteorite Part Slice, Achondrite, 4.24g, Fresh Fusion Crust","description":"\u003ch2\u003eFresh fusion crust on brecciated Vestan material\u003c\/h2\u003e\n\u003cp\u003eThis 4.24g part slice of NWA 17708 retains approximately 50% fresh fusion crust along its edge, providing direct evidence of atmospheric entry heating. The sanded interior face exposes the brecciated texture characteristic of howardites, with contrasting lithologic clasts embedded throughout a fine-grained matrix. The specimen balances exterior preservation with internal structural visibility.\u003c\/p\u003e\n\u003cp\u003eNWA 17708 was recovered in Mali in 2024 and classified as a howardite, part of the HED achondrite group. The part slice form shows both the exterior fusion crust and the complex interior brecciation pattern formed during impact events on Vesta's surface.\u003c\/p\u003e\n\u003ch2\u003eBrecciated structure and surface features\u003c\/h2\u003e\n\u003cp\u003eThe sanded face reveals clasts of varying composition distributed through a darker matrix, representing mixed eucritic and diogenitic material. The brecciation formed when high-energy impacts on Vesta's surface pulverized and recompacted different crustal rock types. This mixing process created the heterogeneous texture visible in the polished section.\u003c\/p\u003e\n\u003cp\u003eThe fusion crust along the edge displays the black, glassy coating formed during the meteorite's passage through Earth's atmosphere. The preserved crust provides a textbook example of atmospheric ablation features. The weak magnetic response typical of HED achondrites confirms the absence of significant metal content.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eHowardites formed on asteroid 4 Vesta, the second-largest body in the asteroid belt and the only differentiated asteroid large enough to retain a basaltic crust. NASA's Dawn mission confirmed Vesta as the HED parent body through spectroscopic analysis matching orbital data with meteorite specimens. Howardites represent the mixed surface regolith of Vesta, created when impacts blended the deeper diogenitic material with the surface eucritic basalts.\u003c\/p\u003e\n\u003cp\u003eThe HED group provides critical data about planetary differentiation processes in the early solar system. Vesta's differentiated structure, iron core, olivine mantle, and basaltic crust, mirrors the internal structure of terrestrial planets, making HED meteorites essential for understanding planetary formation. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to explore how classification systems organize these diverse specimens.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes, NWA 17708 is officially classified in the Meteoritical Bulletin as a howardite achondrite. You can verify the classification through the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a howardite?\u003c\/strong\u003e A howardite is a brecciated achondrite composed of mixed eucritic and diogenitic fragments. These meteorites formed in Vesta's regolith layer when asteroid impacts pulverized and mixed different crustal rock types together.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 4.24g part slice, certificate of authenticity, specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does this specimen have weak magnetism?\u003c\/strong\u003e HED achondrites like howardites contain minimal metallic iron, consisting primarily of silicate minerals. This produces the weak to negligible magnetic response typical of differentiated achondrites from Vesta.\u003c\/p\u003e\n\u003ch2\u003eDisplay-ready Vestan specimen at accessible size\u003c\/h2\u003e\n\u003cp\u003eThis 4.24g slice provides entry to HED collecting at a manageable price point while maintaining scientific significance. The preserved fusion crust adds visual interest and authenticity markers that many collectors prioritize. The part slice format combines displayability with structural detail visibility.\u003c\/p\u003e\n\u003cp\u003eHowardites represent approximately 20% of all HED falls, making them less common than eucrites but more available than diogenites. The 2024 classification date places NWA 17708 among recently recognized Vestan material. Browse the complete \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e collection or explore related \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e specimens from Vesta.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44764635824175,"sku":"NWA-17708-4.24G-SLICE","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/5AD694D6-A306-4821-ADE7-A1A31890DB47.jpg?v=1765770813"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-6-15g-part-slice","title":"NWA 17708 Howardite Meteorite Part Slice, Achondrite, 6.15g, Partial Fusion Crust","description":"\u003ch2\u003eSanded howardite slice with partial fusion crust coverage\u003c\/h2\u003e\u003cp\u003eThis 6.15g part slice of NWA 17708 preserves approximately 50% fusion crust coverage along its edge surfaces, offering direct visual evidence of atmospheric entry heating. The single sanded face reveals brecciated internal structure characteristic of howardites, while the untouched exterior maintains its ablation texture. The fusion crust's preservation at this percentage is significant for a slice, as most cutting removes all atmospheric heating traces. This specimen provides both surface ablation features and interior breccia texture in a single piece.\u003c\/p\u003e\u003cp\u003eNWA 17708 was recovered in Mali in 2024 and classified as a howardite, placing it within the HED (Howardite-Eucrite-Diogenite) achondrite group. The specimen's fresh condition indicates minimal terrestrial weathering since recovery. The sanded face allows examination of clast distribution and matrix composition, while the fusion crust sections document the meteorite's descent through Earth's atmosphere.\u003c\/p\u003e\u003ch2\u003eBrecciation and surface features\u003c\/h2\u003e\u003cp\u003eThe sanded face exposes a heterogeneous breccia containing clasts of varying composition embedded in a fine-grained matrix. These clasts represent different rock types mixed by impact processes on the parent body surface. The contrast between lighter eucritic material and darker diogenitic components creates visible textural variation across the slice. This mixing pattern distinguishes howardites from the more uniform eucrites and diogenites.\u003c\/p\u003e\u003cp\u003eThe preserved fusion crust displays the glassy, blackened texture formed when atmospheric friction melted the meteorite's surface during entry. This ablation coating formed at temperatures exceeding 1600°C as the stone decelerated from cosmic velocities. The crust's thickness and distribution pattern reflect the orientation and tumbling behavior of the fragment during atmospheric passage. The boundary between fusion crust and interior material marks the depth of heating penetration.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eHowardites formed on asteroid 4 Vesta through impact gardening processes that mixed eucritic basalts and diogenitic orthopyroxenites across the surface regolith. These impacts excavated material from different crustal depths and combined them into polymict breccias. NASA's Dawn spacecraft confirmed Vesta as the HED parent body through spectroscopic matching and crater analysis between 2011 and 2012. Vesta is the only definitively identified asteroid source for meteorite groups, making howardites among the few meteorites with spacecraft-confirmed origins.\u003c\/p\u003e\u003cp\u003eThe brecciated texture records billions of years of impact bombardment on Vesta's surface. Each impact event fragmented and mixed existing rock types, creating the complex assemblages seen in howardites. This process parallels lunar regolith formation, offering insights into surface evolution on airless bodies. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how impact processes shape planetary surfaces throughout the solar system.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17708 is classified as a howardite in the Meteoritical Bulletin Database. You can verify this classification at: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin NWA 17708 entry\u003c\/a\u003e. The specimen includes a certificate of authenticity from Treasure Coast Meteorite Co. documenting its classification, weight, and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does howardite mean?\u003c\/strong\u003e Howardites are polymict breccias composed of mixed eucritic and diogenitic material from asteroid Vesta. The name refers to impact-generated mixtures that combine basaltic eucrite and orthopyroxenite diogenite fragments. These breccias formed in Vesta's regolith through billions of years of meteorite impacts that excavated and combined different crustal lithologies.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 6.15g NWA 17708 part slice, certificate of authenticity, specimen information card, and protective gembox display case. The slice measures sufficient size to display both fusion crust and interior brecciation features clearly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the fusion crust important?\u003c\/strong\u003e Fusion crust proves atmospheric entry and distinguishes meteorites from terrestrial rocks. On a slice, fusion crust preservation is uncommon because cutting typically removes all surface material. This specimen's 50% crust coverage allows study of both the ablation surface formed during entry and the internal structure revealed by cutting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I see the different rock types in the breccia?\u003c\/strong\u003e The sanded face reveals clast and matrix variations representing different lithologies mixed by impact. While the individual mineralogy requires magnification or thin section analysis to fully characterize, the textural heterogeneity is visible to the naked eye as variations in grain size and tone across the slice surface.\u003c\/p\u003e\u003ch2\u003eAccessible Vesta material for HED collectors\u003c\/h2\u003e\u003cp\u003eThis 6.15g slice provides entry-level access to confirmed Vesta material at $45.00. The combination of preserved fusion crust and exposed interior structure offers more observational value than many slices at this price point. For collectors building HED suites, howardites represent the regolith component alongside the crustal eucrites and mantle diogenites. The specimen's size accommodates standard display cases while remaining affordable for educational collections.\u003c\/p\u003e\u003cp\u003eNWA 17708's 2024 classification makes this among the most recently studied howardites available to collectors. The fresh find status and minimal weathering preserve original textures without desert oxidation effects common in older Saharan finds. Browse additional specimens from the same parent body in our \u003ca href=\"\/collections\/howardites\"\u003eHowardites\u003c\/a\u003e collection, or explore the complete range of Vesta meteorites in our \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e section.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44764664037423,"sku":"NWA-17708-6.15G-SLICE","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/5078F4FA-7C42-4287-99C1-99CD8FEB70CA.jpg?v=1765770681"},{"product_id":"howardite-meteorite-nwa-17708-from-vesta-rare-achondrite-12-00g-part-slice","title":"NWA 17708 Howardite Meteorite Part Slice, Achondrite, 12.00g, Fusion Crust Preserved","description":"\u003ch2\u003eFresh Vestan regolith breccia with preserved fusion crust\u003c\/h2\u003e\u003cp\u003eThis 12.00g part slice of NWA 17708 preserves approximately 50% fusion crust coverage along its edge surfaces, exhibiting the glossy black exterior formed during atmospheric entry. The sanded interior face exposes contrasting lithologies characteristic of impact-mixed Vestan material. Light-toned eucritic clasts appear embedded within darker diogenitic fragments and fine-grained matrix, creating a mosaic that records the violent collisions that shaped asteroid 4 Vesta's surface billions of years ago.\u003c\/p\u003e\u003cp\u003eThe specimen measures suitable for hand examination while maintaining significant mass for a newly classified howardite. The fusion crust's preservation on half the edge perimeter makes this slice particularly valuable for study, as it displays both the meteorite's exterior shell and interior brecciated structure in a single piece.\u003c\/p\u003e\u003ch2\u003eBrecciation and clast structure\u003c\/h2\u003e\u003cp\u003eThe sanded face reveals the complex brecciation that defines howardites as polymict regolith breccias. Eucritic clasts, composed of basaltic plagioclase and pyroxene, contrast visually with the orthopyroxene-rich diogenitic material. These lithologies do not represent a single impact event but rather the accumulated debris of countless collisions in Vesta's regolith over geological time.\u003c\/p\u003e\u003cp\u003eThe fine-grained matrix binding these clasts consists of pulverized eucritic and diogenitic material, shock-welded by impact pressures. This matrix-clast relationship distinguishes howardites from both pure eucrites and pure diogenites, making them critical for understanding impact gardening processes on differentiated asteroids.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eNWA 17708 originates from asteroid 4 Vesta, the second-largest body in the main asteroid belt and the only differentiated asteroid confirmed to have survived largely intact since the solar system's formation. NASA's Dawn mission data directly links the HED meteorite group to Vesta through spectroscopic matching, making howardites like this specimen verified samples of a world we have photographed and studied from orbit.\u003c\/p\u003e\u003cp\u003eHowardites formed in Vesta's regolith layer, where repeated impacts mixed material from the asteroid's basaltic crust (eucrites) with fragments from its exposed mantle (diogenites). This mixing occurred primarily in the Rheasilvia basin, a massive impact structure near Vesta's south pole that excavated deep enough to expose mantle material. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e provides additional context on how impact processes create these mixed achondrites.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e NWA 17708 is classified as a howardite in the Meteoritical Bulletin Database. You can verify its classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin entry\u003c\/a\u003e. Every specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does howardite mean?\u003c\/strong\u003e Howardites are polymict breccias containing both eucritic (basaltic) and diogenitic (orthopyroxene-rich) material mixed by impacts in Vesta's regolith. The name comes from English chemist Edward Howard, who studied the first scientifically recognized meteorite fall in 1802.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 12.00g part slice, certificate of authenticity, custom specimen card with classification details, and protective gembox display case.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the fusion crust on this specimen?\u003c\/strong\u003e The black glassy coating on approximately 50% of the edge surfaces formed when the meteorite's exterior melted during atmospheric passage. This crust preserves flow features and provides visual contrast with the interior brecciated material.\u003c\/p\u003e\u003ch2\u003eDisplay-ready Vestan sample with scientific documentation\u003c\/h2\u003e\u003cp\u003eThis slice offers collectors a balance of size, fusion crust preservation, and visible brecciation structure. The 12.00g mass provides substantial presence for display while remaining accessible for collectors building comprehensive achondrite collections. The sanded face allows direct observation of clast boundaries and matrix composition without magnification.\u003c\/p\u003e\u003cp\u003eNWA 17708 was recovered in Mali in 2024 and represents recently classified Vestan material available to collectors. The partial fusion crust coverage adds visual interest and scientific value, as specimens showing both exterior and interior characteristics in a single slice are particularly desirable for educational collections. Browse additional verified asteroid samples in our \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017708\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17708\u003c\/a\u003e | Classification: Howardite | Find, Mali, 2024\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44764670066735,"sku":"NWA-17708-12.00G-SLICE","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/97E06DA9-4EE5-452E-9038-11DF19624715.jpg?v=1765770730"},{"product_id":"nwa-17918-diogenite-pm-polymict-breccia-from-vesta-hed-13-33g-polished-end-cut","title":"NWA 17918 Diogenite-pm Meteorite End Cut, 13.33g, Polished Breccia Texture from Vesta","description":"\u003ch2\u003ePolished window into Vesta's deep crust\u003c\/h2\u003e\u003cp\u003eThis 13.33g polished end cut reveals the complex internal architecture of a polymict diogenite breccia. The mirror-polished surface exposes distinct orthopyroxene-rich clasts set within a matrix of comminuted impact debris, documenting multiple collision events on asteroid Vesta's surface. The cut preserves sharp boundaries between individual fragments, each representing different zones within the asteroid's lower crust or upper mantle. Polishing brings out subtle color variations between clast types and highlights the three-dimensional structure of this impact-assembled rock.\u003c\/p\u003e\u003cp\u003eThe specimen's form as an end cut provides both a display face showing the full brecciated texture and a natural exterior surface on the opposite side. At 13.33g, this piece offers substantial mass for a diogenite sample while maintaining excellent visual clarity of the polymict structure. The polish reveals grain boundaries and crystal orientations within individual pyroxene fragments.\u003c\/p\u003e\u003ch2\u003eOrthopyroxene clasts and impact assembly\u003c\/h2\u003e\u003cp\u003eThe dominant mineral phase visible throughout this section is orthopyroxene, the defining component of diogenitic material. Individual clasts range from millimeter-scale fragments to larger domains spanning several millimeters, each showing the characteristic greenish-gray coloration of magnesium-rich pyroxene. These fragments originated as crystallized magma deep within Vesta's interior, later excavated and mixed through violent impact gardening of the asteroid's surface.\u003c\/p\u003e\u003cp\u003eThe polymict nature becomes evident in the varying crystal sizes and textures between adjacent clasts. Some fragments preserve coarse-grained plutonic textures from slow cooling at depth, while others show finer crystallization patterns. The matrix binding these fragments consists of crushed diogenitic material, lithified through impact compression and heating. This assemblage records the cumulative effect of countless impacts that have processed and reprocessed Vesta's crustal material over 4.5 billion years.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eDiogenites represent the deepest crustal samples from asteroid 4 Vesta, the second-largest body in the main asteroid belt. These rocks crystallized from magma chambers several kilometers beneath Vesta's surface during the asteroid's early differentiation. The Dawn spacecraft mission confirmed the connection between HED meteorites and Vesta through spectroscopic mapping and geochemical analysis, making diogenites among the few meteorite types with a confirmed parent body.\u003c\/p\u003e\u003cp\u003eThe polymict classification indicates this specimen formed through impact brecciation on Vesta's surface, where collisions mixed fragments from different depths and locations within the diogenitic crust. NWA 17918 was classified in 2025, making it one of the most recently recognized members of the diogenite group. Study of such specimens helps planetary scientists understand the internal structure of differentiated asteroids and the processes that have modified their surfaces over billions of years. For broader context on meteorite identification and classification, see our guide on \u003ca href=\"\/blogs\/meteorite-guides\/how-to-tell-if-a-rock-is-a-meteorite\"\u003eHow to Tell if a Rock is a Meteorite\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 17918 is officially classified as diogenite-pm by the Meteoritical Society. You can verify this classification through the Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017918\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17918\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does polymict (pm) mean?\u003c\/strong\u003e Polymict refers to a breccia containing fragments from multiple source rocks or locations. In this diogenite, polymict texture indicates that impacts on Vesta's surface mixed clasts from different depths or regions within the diogenitic crust, then lithified them into a single rock. The \"pm\" designation distinguishes this from monomict diogenites, which contain fragments from a single source.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 13.33g polished end cut and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the HED-Vesta connection scientifically important?\u003c\/strong\u003e HED meteorites are the only achondrite group with a confirmed asteroidal parent body, verified by NASA's Dawn mission data. This connection allows scientists to study Vesta's geology through laboratory analysis of meteorites while comparing results to spacecraft observations, providing unique insights into asteroid differentiation and crustal evolution.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should I display a polished end cut?\u003c\/strong\u003e The polished face shows the internal structure best when viewed flat or at a slight angle under good lighting. Many collectors use small acrylic easels or lean the specimen against a backdrop to showcase both the polished surface and the natural exterior edge.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eDiogenite-pm specimens occupy a specialized niche in HED collecting, representing the deepest crustal material from Vesta available to private collectors. Only 74 meteorites carry the diogenite-pm classification, making this subtype substantially rarer than eucrites or howardites. The 13.33g mass provides sufficient size to appreciate the clast structure while remaining accessible compared to larger museum-grade pieces.\u003c\/p\u003e\u003cp\u003eThe 2025 classification date places NWA 17918 among the newest diogenite additions to the Meteoritical Bulletin, offering collectors an opportunity to acquire recently classified material. The polished preparation reveals structural details invisible on uncut specimens, making this format particularly valuable for collectors focused on understanding impact processes and asteroid geology. This specimen fits well in collections emphasizing \u003ca href=\"\/collections\/diogenites\"\u003eDiogenites\u003c\/a\u003e or broader \u003ca href=\"\/collections\/hed-meteorites\"\u003eHED Meteorites\u003c\/a\u003e representing all three components of Vesta's differentiated crust.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=NWA%2017918\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eNWA 17918\u003c\/a\u003e | Classification: Diogenite-pm | Find, Algeria, 2025\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44796018360367,"sku":"NWA-17918-13.33G-ENDCUT","price":255.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_7216.heic?v=1766459540"},{"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-17918-diogenite-pm-slice-9-29g-hed-1-of-74","title":"NWA 17918 Diogenite-pm Meteorite Slice, HED Achondrite, 9.29g, Polymict Breccia from Vesta","description":"\u003ch2\u003ePolymict diogenite from Vesta's lower crust\u003c\/h2\u003e\n\u003cp\u003eThis 9.29g slice of NWA 17918 displays the characteristic texture of a polymict diogenite, with multiple fragments of orthopyroxene-rich material embedded in a fine-grained matrix. The slice reveals distinct clast boundaries where different generations of plutonic rock meet, preserving a record of impact mixing in Vesta's lower crust. The specimen's cross-section shows the coarse crystalline structure typical of slowly cooled deep crustal material, with orthopyroxene crystals visible throughout the brecciated matrix.\u003c\/p\u003e\n\u003cp\u003eFound in Algeria in 2025, NWA 17918 joins a limited group of classified polymict diogenites. With only 76 total classifications recorded for this material, specimens remain scarce in both research and private collections. The slice format provides an optimal view of the internal structure, making the polymict nature of the breccia immediately apparent.\u003c\/p\u003e\n\u003ch2\u003eOrthopyroxene-dominated lithology\u003c\/h2\u003e\n\u003cp\u003eDiogenites consist primarily of orthopyroxene, a magnesium-iron silicate mineral that crystallized from magma deep within Vesta's crust. The polymict designation indicates this specimen contains fragments from multiple source regions, mixed together by ancient impacts. The varying grain sizes and textures within the slice reflect different cooling histories, with some clasts originating from deeper, more slowly cooled layers than others.\u003c\/p\u003e\n\u003cp\u003eThe coarse crystalline structure distinguishes diogenites from the finer-grained eucrites that formed closer to Vesta's surface. Under magnification, the orthopyroxene crystals show the blocky, prismatic forms characteristic of pyroxene minerals, with cleavage planes intersecting at roughly 90-degree angles. The darker matrix material between clasts represents impact-generated melt and crushed mineral grains.\u003c\/p\u003e\n\u003ch2\u003eDiscovery and provenance\u003c\/h2\u003e\n\u003cp\u003eNWA 17918 was recovered in 2025 from the Adrar region of Algeria, totaling 996.87 grams across six stones. The find joins the limited inventory of polymict diogenites available to researchers and collectors, with only a small number of classified specimens of this type circulating worldwide.\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 20.30 grams is held by MUNA (Museo de la Naturaleza y Arqueologia, Tenerife, Spain), with two thin sections retained at ADARA. The main mass is held by Brian McDonald of Treasure Coast Meteorite Co. The classification was approved 21 December 2025 and published in Meteoritical Bulletin 114.\u003c\/p\u003e\n\u003cp\u003ePetrographic analysis confirmed the polymict diogenite designation based on the coexistence of diogenitic and eucritic pyroxene phases. The diogenitic fraction is dominated by low-calcium orthopyroxene (Fs 28.4 to 33.3, Wo 2.9 to 4.3) with pigeonite, subcalcic augite, and ferroan olivine clasts (Fa 65.5 to 70.9). The minor eucritic component includes low-calcium pyroxene (Fs 62.8), calcic plagioclase (An 83.2 to 85.0), and a silica polymorph. Accessory chromite and minor FeNi metal are also present, with magnetic susceptibility measured at 3.40.\u003c\/p\u003e\n\u003ch2\u003eScientific context: Vesta's differentiated interior\u003c\/h2\u003e\n\u003cp\u003eThe asteroid 4 Vesta is the parent body of the HED meteorite suite, which includes howardites, eucrites, and diogenites. Vesta is one of the few asteroids known to have undergone full planetary differentiation, developing a metallic core, a silicate mantle, and a crust. Diogenites originated in the deeper crustal layers, where slow cooling allowed orthopyroxene crystals to grow to substantial size before solidification.\u003c\/p\u003e\n\u003cp\u003eNASA's Dawn mission, which orbited Vesta from 2011 to 2012, confirmed the long-suspected link between HED meteorites and this differentiated asteroid. Spectral measurements from Dawn matched laboratory analyses of diogenites, eucrites, and howardites, providing direct evidence that these meteorites originated from Vesta's surface. The polymict diogenites in particular record the violent impact history that excavated and mixed material from various crustal depths.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. NWA 17918 is classified as Diogenite-pm in the Meteoritical Bulletin. The official classification record is publicly available through the Meteoritical Society database.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"polymict\" mean?\u003c\/strong\u003e Polymict refers to a breccia composed of multiple distinct rock types or fragments from different source regions, mixed together by impact processes. In this case, the slice contains both diogenitic and minor eucritic components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere does this meteorite come from?\u003c\/strong\u003e NWA 17918 originated on the asteroid 4 Vesta, the second-largest object in the asteroid belt. It was ejected by an impact and eventually fell to Earth, where it was recovered in the Adrar region of Algeria in 2025.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is 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 structure. This preparation allows direct visual study of the orthopyroxene clasts and matrix relationships.\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\u003ePolymict diogenites represent a relatively scarce subset of the HED meteorite group, with only 76 approved classifications worldwide. The combination of multiple orthopyroxene generations, accessory chromite and FeNi metal, and the rare eucritic component makes specimens like NWA 17918 particularly valuable for collectors building a Vesta-focused reference collection. This 9.29g slice provides a substantial viewing area while remaining accessible to private collectors.\u003c\/p\u003e\n\u003cp\u003eThe slice format displays the polymict texture in a way that complete individuals cannot, with clast boundaries and grain relationships immediately visible. Explore additional Vesta-derived specimens in our \u003ca href=\"\/collections\/achondrites\"\u003eAchondrites\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=86256\" target=\"_blank\"\u003eNorthwest Africa 17918\u003c\/a\u003e. 996.87 g | MB 114 (2025).\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44902133956655,"sku":"NWA-17918-9.29G-SLICE","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/nwa-17918-diogenite-pm-meteorite-9.29g-front-face.heic?v=1779457546"},{"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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/collections\/hed-meteorites-collection.png?v=1766196833","url":"https:\/\/www.tcmeteorites.com\/collections\/hed-meteorites.oembed","provider":"Treasure Coast Meteorite Co.","version":"1.0","type":"link"}