{"title":"Iron Meteorites","description":"\u003cp\u003eIron meteorites are the exposed cores of ancient asteroids: dense, metallic objects that formed when small planetary bodies melted, differentiated, and were later shattered by collisions. Every iron meteorite in this collection is a direct sample of an asteroid interior, typically 4.5 billion years old. Unless noted in the listing, each specimen is authenticated through its Meteoritical Bulletin classification.\u003c\/p\u003e\n\n\u003ch2\u003eHow we verify iron meteorites are real\u003c\/h2\u003e\n\u003cp\u003eEach specimen ships with its Meteoritical Bulletin classification and, where useful, a polished and etched face that confirms the Widmanstatten pattern. Learn how the registry works on our \u003ca href=\"\/pages\/meteoritical-bulletin-explained\"\u003eMeteoritical Bulletin explained\u003c\/a\u003e page, and see broader identification tips on \u003ca href=\"\/pages\/how-can-you-tell-if-a-meteorite-is-real\"\u003ehow to tell if a meteorite is real\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eWhat makes iron meteorites distinctive\u003c\/h2\u003e\n\u003cp\u003eIron meteorites are composed primarily of iron-nickel alloy (the minerals kamacite and taenite) and are immediately recognizable by their metallic weight and density. Most contain enough metal to attract a strong magnet.\u003c\/p\u003e\n\u003cp\u003eWhen cut, polished, and etched with dilute acid, the majority reveal the \u003cstrong\u003eWidmanstatten pattern\u003c\/strong\u003e: an interlocking geometric crystal structure of kamacite and taenite bands that formed over millions of years of slow cooling deep inside an asteroid. This pattern is impossible to replicate in a lab, so it remains the definitive visual proof of iron meteorite origin. Read more: \u003ca href=\"\/pages\/widmanstatten-pattern-explained\"\u003eWidmanstatten pattern explained\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eCommon forms and structural groups\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEtched slices\u003c\/strong\u003e show the full Widmanstatten pattern and are the most popular display format.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolished slices\u003c\/strong\u003e highlight metallic luster without acid etching and are ideal for jewelry blanks or contrasting display pieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete individuals\u003c\/strong\u003e preserve natural regmaglypts and fusion crust, recording the meteorite atmospheric passage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEnd cuts\u003c\/strong\u003e combine an exterior face with an interior polished face, offering both surface and structural views.\u003c\/p\u003e\n\u003cp\u003eStructurally, iron meteorites are grouped by bandwidth as hexahedrites, octahedrites (coarsest through finest), and ataxites. Chemical groups such as IAB, IIAB, IIIAB, IVA, and IVB reflect parent body chemistry and are recorded in each specimen Meteoritical Bulletin entry.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre all iron meteorites magnetic?\u003c\/strong\u003e Yes. Iron meteorites are strongly ferromagnetic due to their iron-nickel composition and will firmly attract a strong neodymium magnet. Read more: \u003ca href=\"\/pages\/are-meteorites-magnetic\"\u003eAre meteorites magnetic?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the Widmanstatten pattern?\u003c\/strong\u003e It is an interlocking crystal structure of kamacite and taenite that forms only during millions of years of slow cooling inside an asteroid. It cannot be faked and is definitive proof of iron meteorite origin. Read more: \u003ca href=\"\/pages\/widmanstatten-pattern-explained\"\u003eWidmanstatten pattern explained\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo iron meteorites rust?\u003c\/strong\u003e Yes. Metallic iron oxidizes when exposed to moisture. Store specimens with silica gel desiccant, and etched faces benefit from a thin lacquer coating. Read more: \u003ca href=\"\/pages\/do-meteorites-rust\"\u003eDo meteorites rust?\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I store an iron meteorite?\u003c\/strong\u003e Keep specimens in a low-humidity environment, ideally inside a sealed display case with silica gel. Avoid bare-hand contact, since skin oils accelerate corrosion. Read more: \u003ca href=\"\/pages\/how-to-care-for-and-store-a-meteorite\"\u003eHow to care for and store a meteorite\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these specimens authenticated?\u003c\/strong\u003e Unless noted in the listing title or description, specimens in this collection are Meteoritical Bulletin classified with a direct link to the official record. Every purchase ships with a Treasure Coast Meteorite Co. certificate of authenticity.\u003c\/p\u003e\n\n\u003cp\u003eSee also: \u003ca href=\"\/collections\/muonionalusta\"\u003eMuonionalusta\u003c\/a\u003e · \u003ca href=\"\/collections\/stony-iron-meteorites\"\u003eStony-iron meteorites\u003c\/a\u003e · \u003ca href=\"\/collections\/stony-meteorites\"\u003eStony meteorites\u003c\/a\u003e · \u003ca href=\"\/pages\/widmanstatten-pattern-explained\"\u003eWidmanstatten pattern explained\u003c\/a\u003e · \u003ca href=\"\/pages\/types-of-meteorites\"\u003eTypes of meteorites\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"kaalijarv-iron-meteorite-full-slice-iab-mg-etched-w-coa-gembox-display-case-33-00g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 33.00g, Widmanstätten Pattern","description":"\u003ch2\u003eBronze Age impact iron from Estonia's crater field\u003c\/h2\u003e\u003cp\u003eThis 33.00g slice originates from the Kaali crater field on Saaremaa Island, Estonia, where a meteorite fragmented during atmospheric entry and impacted approximately 3,500 years ago during the Bronze Age. The Kaalijärv meteorite is one of the few iron meteorites directly linked to a preserved terrestrial impact structure with documented human settlement in the vicinity at the time of fall. Acid etching reveals the internal crystalline architecture formed during slow cooling in the metallic core of a differentiated asteroid.\u003c\/p\u003e\u003cp\u003eThe slice shows kamacite and taenite bands intersecting across the polished and etched surface. The boundaries between crystal phases are sharp and well-defined, characteristic of IAB-MG octahedrites that crystallized over millions of years in a parent body shielded from rapid temperature change. Surface preparation brings out contrast between the metallic phases without obscuring structural detail.\u003c\/p\u003e\u003ch2\u003eKamacite-taenite intergrowth and octahedrite structure\u003c\/h2\u003e\u003cp\u003eThe Widmanstätten pattern visible on this specimen consists of kamacite plates nucleating along specific crystallographic planes within a taenite matrix. This structure forms exclusively in metallic bodies cooling at rates between 1 and 100 degrees Celsius per million years. Faster or slower cooling produces different iron meteorite subtypes with distinct internal geometries.\u003c\/p\u003e\u003cp\u003eIAB-MG meteorites show medium to coarse bandwidth in their kamacite lamellae, typically ranging from 0.5 to 3.0 millimeters. The etched surface on this slice displays this banding clearly, with individual kamacite plates extending across the face without significant distortion. The metallic luster remains intact along unetched regions, providing visual contrast between structural and reflective surfaces.\u003c\/p\u003e\u003ch2\u003eScientific context of IAB complex irons\u003c\/h2\u003e\u003cp\u003eThe IAB complex represents a diverse group of iron meteorites with silicate inclusions and compositional variations that suggest formation in a parent body that underwent partial differentiation followed by catastrophic disruption and reassembly. Unlike fully differentiated iron meteorite groups that formed in stable planetary cores, IAB meteorites likely originated from a rubble-pile asteroid containing both metallic and silicate material mixed during post-impact reassembly.\u003c\/p\u003e\u003cp\u003eThe MG (medium to coarse octahedrite) structural classification indicates cooling rates consistent with burial depths of tens of kilometers within the parent body. Material from Kaalijärv provides physical evidence of these processes and offers collectors a specimen type formed under conditions no longer occurring in the present-day solar system. For foundational information on meteorite formation and classification, see 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 Yes. Kaalijärv is classified as an IAB-MG octahedrite in the Meteoritical Bulletin. You can verify the classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin Database\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does IAB-MG mean?\u003c\/strong\u003e IAB refers to the chemical and isotopic group, indicating this meteorite belongs to the IAB complex of iron meteorites. MG designates the structural class as a medium to coarse octahedrite, based on kamacite bandwidth visible after etching. This classification reflects both composition and cooling history.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 33.00g etched slice and a certificate of authenticity. No display stand is included unless otherwise stated.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is Kaalijärv historically significant?\u003c\/strong\u003e The Kaali impact occurred during the Bronze Age when the region was inhabited. The crater field is one of the few meteorite impact sites with a confirmed fall date within the span of recorded human activity, making material from this locality relevant to both planetary science and archaeoastronomy.\u003c\/p\u003e\u003ch2\u003eDisplay and collection value\u003c\/h2\u003e\u003cp\u003eKaalijärv occupies a distinct position among iron meteorites due to its association with a documented impact crater and a fall event contemporaneous with human settlement. Material from this locality is finite, and etched slices that display clear Widmanstätten structure are sought by collectors interested in impact geology and historically significant meteorites.\u003c\/p\u003e\u003cp\u003eThis specimen weighs 33.00g, a size suitable for detailed examination of crystalline structure while remaining practical for display in standard meteorite cases or shadow boxes. The etched surface provides educational value for those studying metallic meteorite formation and cooling processes. Additional examples of octahedrites and other iron meteorite subtypes are available in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron meteorite (IAB-MG octahedrite) | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44741786927151,"sku":"KAALIJARV-33.00G-SLICE-ETCHED","price":330.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-33.00g-full-slice-display-stand-top.jpg?v=1778631711"},{"product_id":"kaalijarv-iron-meteorite-slice-iab-mg-etched-29-51g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 29.51g, Etched Widmanstätten Pattern","description":"\u003ch2\u003eEtched iron from a Bronze Age impact site\u003c\/h2\u003e\n\u003cp\u003eThis 29.51g slice reveals the internal crystalline architecture of Kaalijärv, an IAB-MG octahedrite that struck Saaremaa Island approximately 3,500 years ago. The etched surface exposes the interlocking kamacite and taenite bands that define the Widmanstätten pattern, a structure achievable only through slow cooling in the metallic core of a differentiated asteroid. The pattern spreads across the face in angular geometric bands, documenting the thermal history of this fragment before atmospheric entry.\u003c\/p\u003e\n\u003cp\u003eKaalijärv material comes from one of the few impact sites where meteorite fragments have been directly linked to a preserved crater field. The main crater measures 110 meters in diameter, and the impact occurred during a period of active human settlement in the region. This specimen connects extraterrestrial geology with documented terrestrial impact evidence.\u003c\/p\u003e\n\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe slice displays the characteristic morphology of a medium octahedrite, with kamacite lamellae ranging from 0.5 to 2.0 millimeters in width. Etching with dilute acid reveals these bands by selectively attacking the nickel-poor kamacite phase while leaving the nickel-rich taenite boundaries intact. The resulting relief provides both visual contrast and tactile texture across the metallic surface.\u003c\/p\u003e\n\u003cp\u003eThe iron-nickel composition reflects extremely slow cooling within the parent body's core, on the order of a few degrees Celsius per million years. This cooling regime allowed the kamacite and taenite crystals to grow along preferred crystallographic orientations, producing the intersecting geometric pattern visible after etching. The slice preserves this structure without visible terrestrial weathering or oxide formation beyond light patina development.\u003c\/p\u003e\n\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eIAB-MG meteorites belong to a complex group exhibiting both magmatic and impact-related characteristics. The MG (main group) subclassification indicates chemical and structural signatures consistent with differentiation processes in a partially molten asteroid, likely disrupted and reassembled through collisional events early in solar system history. These irons provide evidence for the diversity of thermal and impact processes that shaped metallic bodies during planetary formation.\u003c\/p\u003e\n\u003cp\u003eThe Kaalijärv fall is dated to approximately 1530 BCE based on geological and archaeological evidence. The crater field preserves impact melt glass, shocked quartz, and meteoritic fragments distributed across multiple impact points, suggesting the incoming body fragmented during atmospheric entry. Material from this locality offers both extraterrestrial composition and documented terrestrial impact context. For broader meteorite identification principles, see \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\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Kaalijärv is classified in the Meteoritical Bulletin as an IAB-MG octahedrite: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting the classification, weight, and locality data.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does IAB-MG mean?\u003c\/strong\u003e IAB identifies the chemical group based on trace element ratios and isotopic composition. MG indicates main group, the largest subgroup within the IAB classification. These meteorites show evidence of both core crystallization and impact disruption in their parent asteroid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 29.51g etched slice and certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the Widmanstätten pattern?\u003c\/strong\u003e The geometric intergrowth of kamacite and taenite crystals visible after acid etching. This structure forms only through extremely slow cooling in zero-gravity environments and cannot be replicated terrestrially. The pattern serves as diagnostic evidence of extraterrestrial origin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is Kaalijärv historically significant?\u003c\/strong\u003e The impact occurred during the Bronze Age, within documented human settlement periods. The crater field is one of the youngest confirmed meteorite impact sites on Earth, and local folklore references the event, making it one of the few meteorite falls potentially recorded in oral tradition.\u003c\/p\u003e\n\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eKaalijärv combines confirmed IAB-MG classification with direct association to a preserved crater field, a pairing uncommon among iron meteorites. Most irons lack both precise recovery context and impact site documentation. This specimen offers both extraterrestrial crystalline structure and verifiable terrestrial impact evidence.\u003c\/p\u003e\n\u003cp\u003eThe etched surface provides immediate visual confirmation of meteoritic origin through the Widmanstätten pattern, making this slice suitable for both display and educational reference. At 29.51g, the piece balances structural visibility with accessible weight. Collectors seeking documented iron meteorites with geological and archaeological context will find this specimen particularly relevant. Additional classified irons are available in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron meteorite (IAB-MG octahedrite) | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44741807341615,"sku":"KAALIJARV-29.51G-SLICE-ETCHED","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-29.51g-full-slice-display-stand-top.jpg?v=1778634301"},{"product_id":"kaalijarv-iron-meteorite-slice-iab-mg-etched-31-18g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 31.18g, Etched Widmanstätten Pattern","description":"\u003ch2\u003eEtched crystalline architecture from a Bronze Age impact\u003c\/h2\u003e\n\u003cp\u003eThis 31.18g slice of Kaalijärv iron meteorite shows the interlocking kamacite and taenite bands that define the Widmanstätten pattern. Acid etching reveals the internal crystalline structure formed during slow cooling over millions of years within the metallic core of a differentiated parent body. The etched surface exposes geometric bands that intersect at characteristic angles, a structure that forms only under extraterrestrial conditions and cannot be replicated in terrestrial materials.\u003c\/p\u003e\n\u003cp\u003eKaalijärv material originates from a crater field on Saaremaa Island, Estonia, where impact occurred approximately 3,500 years before present during the Bronze Age. This specimen represents both extraterrestrial material and direct evidence of a documented terrestrial impact event within the timeline of human settlement.\u003c\/p\u003e\n\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe slice displays the coarse octahedrite structure characteristic of IAB-MG classification. Kamacite bandwidth measures several millimeters, creating distinct geometric patterns visible across the etched face. The intersection angles between kamacite lamellae reflect the cubic crystal structure of the original taenite that transformed during cooling.\u003c\/p\u003e\n\u003cp\u003eEtching with dilute acid preferentially attacks kamacite, creating surface relief that emphasizes the three-dimensional nature of the Widmanstätten structure. The metallic luster on unetched edges contrasts with the textured etched surface, showing both the raw iron-nickel composition and the internal crystalline architecture. No fusion crust remains on this prepared slice.\u003c\/p\u003e\n\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eIAB-MG iron meteorites represent material from asteroid cores that underwent incomplete differentiation and subsequent impact disruption. The medium to coarse octahedrite structure indicates cooling rates between 1 and 10 degrees Celsius per million years, consistent with formation within a body tens of kilometers in diameter. These meteorites contain kamacite bandwidths that place them in the medium-to-coarse range of the structural classification system developed by Buchwald.\u003c\/p\u003e\n\u003cp\u003eThe Kaalijärv impact occurred when a single iron meteoroid fragmented during atmospheric entry, creating at least nine craters across a two-kilometer field. Dating through sediment analysis and archaeological context places the event around 1530-1450 BCE. This makes Kaalijärv one of few meteorite falls with both recovered material and preserved impact structures studied through field geology. For comprehensive information about meteorite types and identification, see our guide on \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. Kaalijärv is classified in the Meteoritical Bulletin as an IAB-MG iron meteorite. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its provenance and classification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does IAB-MG octahedrite mean?\u003c\/strong\u003e IAB-MG identifies the chemical group and subgroup based on trace element composition and oxygen isotope ratios. Octahedrite refers to the structural classification based on kamacite bandwidth. MG indicates medium-to-coarse bandwidth, typically 1.3 to 3.3 millimeters, visible in this etched specimen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 31.18g etched slice and certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does etching reveal the Widmanstätten pattern?\u003c\/strong\u003e Acid etching preferentially dissolves kamacite faster than taenite due to differences in nickel content. This creates surface relief along the boundaries between crystal phases, making the three-dimensional structure visible to the eye. The pattern exists throughout the meteorite but becomes apparent only when etched or naturally weathered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow old is the Kaalijärv impact event?\u003c\/strong\u003e Radiocarbon dating of charcoal and peat from crater sediments places the impact at approximately 3,500 years before present, during the Bronze Age. This dating is supported by archaeological evidence from the surrounding settlement areas on Saaremaa Island.\u003c\/p\u003e\n\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eKaalijärv occupies a unique position among iron meteorites because recovered material can be directly linked to a preserved and studied impact site. The crater field on Saaremaa Island provides geological context rarely available for meteorite specimens. Collectors value this connection between the meteorite and its documented terrestrial impact evidence.\u003c\/p\u003e\n\u003cp\u003eEtched slices like this specimen serve both as display pieces and as reference material for understanding iron meteorite structure. The visible Widmanstätten pattern demonstrates the slow cooling history and crystalline architecture that define octahedrite classification. Material from this locality appears infrequently in the collector market. Browse additional iron meteorite specimens with structural detail in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron meteorite (IAB-MG octahedrite) | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44741816025135,"sku":"KAALIJARV-31.18G-SLICE","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-31.18g-full-slice-display-stand-front.jpg?v=1778642167"},{"product_id":"gebel-kamil-iron-meteorite-ungrouped-ataxite-from-egypt-w-coa","title":"Gebel Kamil Iron Meteorite Individual, Ungrouped Ataxite, 216.06g, Polished Window","description":"\u003ch2\u003eImpact crater specimen with polished observation window\u003c\/h2\u003e\u003cp\u003eThis 216.06g Gebel Kamil individual presents dual observation surfaces: the natural desert-weathered exterior preserves the specimen's journey through Egyptian sands, while a cut and polished window exposes the homogeneous ataxite structure beneath. The polished face reveals the characteristic featureless texture of ungrouped ataxites, lacking the kamacite-taenite patterns found in octahedrites. The specimen's mass and dual finish make it suitable for both display and scientific examination of ataxite composition.\u003c\/p\u003e\u003cp\u003eGebel Kamil meteorites originate from a 45-meter impact crater discovered in 2009 in Egypt's remote southwestern desert. The crater's exceptional preservation and the recovery of thousands of iron meteorite fragments create a direct link between crater formation and impactor material. This specimen's substantial weight places it among the larger recoveries from the strewn field, where most fragments weigh under 100g.\u003c\/p\u003e\u003ch2\u003eStructure and features\u003c\/h2\u003e\u003cp\u003eThe polished window displays the diagnostic texture of ataxite meteorites: a uniform fine-grained structure resulting from extremely slow cooling in the metallic core of a differentiated parent body. Unlike octahedrites with their visible Widmanstätten patterns, ataxites contain such high nickel content that kamacite crystals never developed during cooling. The exterior surface retains regmaglypts and oxidation products from atmospheric entry and terrestrial weathering in the hyperarid Egyptian environment.\u003c\/p\u003e\u003cp\u003eThe specimen's geometry reflects natural fragmentation during impact. The polished face was prepared to expose the interior metallic structure, revealing the consistent grain texture throughout the mass. The transition between weathered exterior and bright polished metal demonstrates the specimen's solid composition without internal fracturing or shock melts.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eGebel Kamil belongs to the ungrouped iron meteorites, samples that do not fit established chemical classifications. These meteorites represent distinct parent bodies or unusual formation conditions not captured by the standard groups. The ataxite structure indicates nickel content exceeding approximately 16%, placing this material in a high-nickel compositional regime. The Gebel Kamil crater provides rare terrestrial evidence connecting specific crater features to the impactor's metallurgical properties. Studies of the crater and meteorite fragments constrain impact velocity, angle, and energy deposition during crater excavation. For collectors and researchers studying impact processes, Gebel Kamil specimens link laboratory meteorite analysis to field observations of cratering mechanics. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e explains how iron meteorite classification systems organize specimens by structure and chemistry.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Gebel Kamil is classified as Iron (ungrouped, ataxite) in the Meteoritical Bulletin Database. The classification confirms ungrouped status and ataxite structure through compositional and structural analysis. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co. documenting its provenance from the Gebel Kamil crater strewn field.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does ataxite mean?\u003c\/strong\u003e Ataxite describes iron meteorites with nickel content so high that kamacite crystals did not form during cooling, resulting in a uniform fine-grained structure lacking Widmanstätten patterns. The term comes from Greek meaning \"without structure,\" referring to the absence of visible crystalline patterns when etched.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 216.06g Gebel Kamil individual with natural exterior and polished window, certificate of authenticity, and specimen card with classification details. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does this specimen have a polished window?\u003c\/strong\u003e The polished face was cut to expose the interior metallic structure for observation and study. This preparation allows examination of the ataxite texture while preserving the natural exterior surface, combining aesthetic display value with scientific accessibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen was the Gebel Kamil crater discovered?\u003c\/strong\u003e The impact crater was discovered in 2009 during satellite image surveys of Egypt's southwestern desert. The crater's young age (estimated at 5,000 years old based on geological evidence) and excellent preservation make it significant for impact studies.\u003c\/p\u003e\u003ch2\u003eCollector significance\u003c\/h2\u003e\u003cp\u003eGebel Kamil meteorites connect collectors to one of Earth's youngest and best-preserved simple impact craters. The 2009 discovery and subsequent scientific publications elevated these specimens beyond typical iron meteorite finds. The dual-finish preparation on this individual provides both visual interest through the contrasting surfaces and scientific value through the exposed ataxite structure. At 216.06g, this specimen represents substantial mass from a geologically recent impact event with documented crater morphology. Collectors focused on impact crater associations, ungrouped irons, or North African meteorites prioritize Gebel Kamil material. The specimen's weight supports stable display orientations while remaining accessible for handling and examination. \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e in the collection includes both grouped and ungrouped classifications, with Gebel Kamil specimens offering the crater provenance context that distinguishes them from other ungrouped ataxites.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel%20Kamil\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748800229423,"sku":"GEBEL-KAMIL-216.06G-INDIVIDUAL","price":400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6883.heic?v=1765238922"},{"product_id":"gebel-kamil-iron-meteorite-ungrouped-ataxite-from-egypt-w-coa-2","title":"Gebel Kamil Iron Meteorite Individual, Ungrouped Ataxite, 224.00g, Egyptian Crater Discovery","description":"\u003ch2\u003eIndividual specimen from Earth's youngest confirmed impact crater\u003c\/h2\u003e\u003cp\u003eThis 224.00g individual retains the natural surface texture acquired during its residence in Egypt's Eastern Desert. The specimen exhibits the characteristic dark patina that develops on iron meteorites exposed to arid conditions, with surface features shaped by both atmospheric entry and terrestrial weathering. Gebel Kamil's discovery in 2009 provided scientists with access to fresh material from a crater system less than 5,000 years old, making specimens like this particularly valuable for studying recent impact dynamics and iron meteorite weathering processes in desert environments.\u003c\/p\u003e\u003cp\u003eThe Gebel Kamil crater measures 45 meters in diameter and preserves exceptional evidence of hypervelocity impact. Unlike most iron meteorite falls where material scatters across wide strewnfields, Gebel Kamil specimens cluster around a well-defined crater structure, allowing researchers to correlate individual fragments with specific impact mechanics. This specimen's mass and form reflect the violent fragmentation that occurs when iron bodies strike Earth at cosmic velocities.\u003c\/p\u003e\u003ch2\u003eAtaxite structure and composition\u003c\/h2\u003e\u003cp\u003eGebel Kamil belongs to the ungrouped ataxites, a classification reserved for iron meteorites with such high nickel content that they lack the octahedral crystal structure typical of most iron meteorites. Instead of Widmanstätten patterns, ataxites display a nearly homogeneous metal structure visible only under specialized microscopic analysis. The exterior surface shows regmaglypts and ablation features from atmospheric passage, preserved beneath the desert patina that accumulated over millennia of terrestrial exposure.\u003c\/p\u003e\u003cp\u003eThe ungrouped designation indicates this meteorite does not fit existing iron meteorite groups based on trace element analysis and structural characteristics. This specimen represents material from a parent body with a distinct thermal and chemical evolution, likely a differentiated asteroid core that experienced cooling conditions different from those that produced grouped iron meteorites.\u003c\/p\u003e\u003ch2\u003eScientific context\u003c\/h2\u003e\u003cp\u003eThe Gebel Kamil impact occurred within the past 5,000 years, making it one of the youngest confirmed crater-forming events on Earth. The crater's preservation in the hyper-arid Saharan environment allowed scientists to study impact processes with minimal erosional modification. Fresh specimens recovered from the crater site provide data on shock effects, fragmentation patterns, and the relationship between impactor mass and crater dimensions for iron meteorite impacts.\u003c\/p\u003e\u003cp\u003eAtaxites form in parent body cores where extremely slow cooling rates allow nickel-rich metal to remain in a uniform crystal structure. The high nickel content prevents the formation of kamacite lamellae that create visible Widmanstätten patterns in octahedral irons. Study of ungrouped ataxites like Gebel Kamil helps scientists understand the diversity of differentiation processes in early solar system planetesimals. \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, Gebel Kamil is classified in the Meteoritical Bulletin as an ungrouped ataxite iron meteorite found in Egypt in 2009. Meteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel%20Kamil\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eGebel Kamil\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does ungrouped ataxite mean?\u003c\/strong\u003e Ataxites are iron meteorites with such high nickel content (typically over 16%) that they lack the crystalline structure that produces Widmanstätten patterns. Ungrouped means this meteorite's chemical signature does not match any established iron meteorite group, indicating it originated from a unique parent body with distinct formation conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 224.00g Gebel Kamil individual with natural surface patina and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the Gebel Kamil crater scientifically significant?\u003c\/strong\u003e As one of Earth's youngest confirmed impact craters at less than 5,000 years old, Gebel Kamil preserves exceptional evidence of iron meteorite impact processes. The crater's discovery allowed scientists to study fresh impact material and correlate crater morphology with known impactor characteristics, providing rare data on small iron meteorite impacts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat caused the dark surface patina?\u003c\/strong\u003e The patina results from oxidation and chemical weathering during the meteorite's residence in Egypt's Eastern Desert. Desert-weathered iron meteorites develop characteristic surface textures and coloration from exposure to temperature fluctuations, wind abrasion, and limited moisture over thousands of years.\u003c\/p\u003e\u003ch2\u003eSignificance for collectors and researchers\u003c\/h2\u003e\u003cp\u003eGebel Kamil specimens occupy a distinct position in meteorite collections due to their association with a named, studied impact crater. Unlike most meteorite finds where context is limited to strewnfield coordinates, this specimen comes from a crater system where scientists mapped impact mechanics, ejecta distribution, and fragmentation patterns. The 224.00g mass represents substantial material from an ungrouped classification, providing collectors with access to iron meteorite chemistry not represented in the major groups.\u003c\/p\u003e\u003cp\u003eThe combination of recent discovery, crater association, and ungrouped status makes Gebel Kamil particularly desirable for institutional and private collections focused on impact processes or iron meteorite diversity. This individual's natural surface preservation documents both the violence of atmospheric entry and the slow modification by desert weathering. Browse similar specimens in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel%20Kamil\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748804587567,"sku":"GEBEL-KAMIL-224.00G-INDIVIDUAL","price":425.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6896.heic?v=1765239578"},{"product_id":"gebel-kamil-iron-meteorite-ungrouped-ataxite-from-egypt-430-46g","title":"Gebel Kamil Iron Meteorite Individual, Ungrouped Ataxite, 430.46g, Impact Crater Specimen","description":"\u003ch2\u003eIndividual from one of Earth's youngest impact craters\u003c\/h2\u003e\n\u003cp\u003eThis 430.46g Gebel Kamil individual preserves the deformation signature of hypervelocity impact. The specimen displays pronounced regmaglypts across its surface, thumbprint-like ablation features formed as atmospheric friction melted and sculpted the iron during entry. Impact-induced deformation is visible throughout the mass, evidence of the shock event that excavated the 45-meter crater in Egypt's southwestern desert approximately 5,000 years ago.\u003c\/p\u003e\n\u003cp\u003eThe surface texture documents the thermal and mechanical stresses of atmospheric passage. Regmaglypts cover the exterior in overlapping patterns, their depth and distribution recording the rotation and orientation of the meteoroid during descent. Shrapnel deformation from the hypervelocity impact compresses portions of the mass, creating structural distortions that distinguish crater-recovered specimens from more gently fallen meteorites.\u003c\/p\u003e\n\u003ch2\u003eAtaxite structure and composition\u003c\/h2\u003e\n\u003cp\u003eGebel Kamil is classified as an ungrouped ataxite, a rare structural type representing less than 2% of recovered iron meteorites. Ataxites lack the crystalline Widmanstätten pattern found in octahedrites, instead forming a fine-grained nickel-iron structure with more than 16% nickel content. This high nickel concentration prevents the formation of visible kamacite and taenite bands even under acid etching.\u003c\/p\u003e\n\u003cp\u003eThe ungrouped classification indicates Gebel Kamil does not match the chemical and isotopic signatures of established iron meteorite groups. This specimen derives from a distinct parent body fragmentation event, representing a separate population in the asteroid belt. The ataxite structure formed through slow cooling in the core of its parent asteroid over millions of years before catastrophic disruption ejected fragments into Earth-crossing orbits.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eThe Gebel Kamil crater in Egypt's southwestern desert represents one of the best-preserved young impact structures on Earth. Discovered in 2008 and confirmed through meteorite recovery in 2009, the crater measures 45 meters in diameter and excavates Cretaceous sandstone bedrock. The pristine preservation results from the hyperarid climate, which limits erosion and allows detailed study of impact mechanics.\u003c\/p\u003e\n\u003cp\u003eDiscovery of the crater and subsequent meteorite recovery provided researchers with a complete impact system, crater morphology, ejecta distribution, and the projectile material itself. This correlation allows precise modeling of impact velocity, angle, and energy release. The youth of the structure, estimated at approximately 5,000 years, means the crater formed during human prehistory, though no historical records document the event. Gebel Kamil joins a select group of craters where the impactor has been recovered and classified, advancing understanding of small-body impact processes. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e to understand how crater formation and meteorite recovery inform planetary science.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Gebel Kamil is classified in the Meteoritical Bulletin as Iron (ungrouped, ataxite). You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel%20Kamil\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does ungrouped ataxite mean?\u003c\/strong\u003e Ataxites are iron meteorites with more than 16% nickel, preventing the formation of visible Widmanstätten patterns. Ungrouped means this meteorite's chemistry does not match any established iron meteorite group, indicating it derives from a distinct parent body in the asteroid belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are regmaglypts?\u003c\/strong\u003e Regmaglypts are the thumbprint-like depressions covering this specimen's surface. They form during atmospheric entry when differential ablation creates flow patterns in the melting metal. The pattern on this piece records its orientation and rotation during descent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 430.46g Gebel Kamil individual, certificate of authenticity, and specimen card with classification details. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow rare are crater-recovered meteorites?\u003c\/strong\u003e Extremely rare. Only a handful of impact craters on Earth preserve both the structure and recoverable meteorite fragments. Gebel Kamil is one of the youngest and best-preserved examples, making specimens from this fall scientifically significant for impact studies.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eGebel Kamil occupies a position in meteorite collecting that few specimens can match, a classified ungrouped iron with documented crater association and preservation of impact features. The crater's discovery in 2008 and subsequent meteorite recovery created international attention in the meteoritics community. Specimens from crater-associated falls command collector interest because they connect the meteorite to its impact event, providing context beyond the material itself.\u003c\/p\u003e\n\u003cp\u003eThis 430.46g individual offers substantial mass with clear surface features. The regmaglypts and impact deformation visible across the specimen provide visual evidence of the forces involved in atmospheric entry and ground impact. The weight places this piece in the mid-range for Gebel Kamil individuals, large enough for display presence while remaining accessible compared to kilogram-class specimens. Collectors focused on \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e recognize Gebel Kamil as a geologically young fall with exceptional preservation and documented provenance.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel%20Kamil\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44748804751407,"sku":"GEBEL-KAMIL-430.46G-INDIVIDUAL","price":800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/gebel-kamil_9aec36f6-1fa5-49aa-8502-661948837ed2.png?v=1766199503"},{"product_id":"gebel-kamil-iron-meteorite-ungrouped-ataxite-from-egypt-in-acrylic-display-box-w-coa","title":"Gebel Kamil Iron Meteorite, Ungrouped Ataxite, Select Size, in Acrylic Gift Box w\/COA","description":"\u003ch2\u003eA genuine iron meteorite from the Egyptian desert, in three sizes\u003c\/h2\u003e\n\u003cp\u003eGebel Kamil is one of the most well-documented iron meteorite finds of the modern era. Discovered in 2009 in the Egyptian Sahara after being identified in satellite imagery, it produced thousands of individuals ranging from sub-gram fragments to pieces exceeding ten kilograms. Each specimen is a dense, metallic fragment of an asteroid that impacted Earth relatively recently in geological terms.\u003c\/p\u003e\n\u003ch2\u003eSelect your size\u003c\/h2\u003e\n\u003cp\u003eEach size carries a guaranteed minimum weight. You will receive a specimen at or above the minimum for the size selected. Photos shown are representative examples from actual inventory, every piece varies slightly in shape and surface detail.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eMinimum Weight\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmall\u003c\/td\u003e\n\u003ctd\u003e1.00g\u003c\/td\u003e\n\u003ctd\u003e$10.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003ctd\u003e2.00g\u003c\/td\u003e\n\u003ctd\u003e$15.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLarge\u003c\/td\u003e\n\u003ctd\u003e3.00g\u003c\/td\u003e\n\u003ctd\u003e$20.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eGebel Kamil is classified as an ungrouped ataxite, an iron meteorite with such a high nickel content that it does not develop the Widmanstatten pattern seen in lower-nickel irons. Instead, the internal structure is dominated by fine-grained taenite, a nickel-iron mineral that gives the metal a smooth, homogeneous appearance in cross-section. At approximately 20% nickel by weight, Gebel Kamil sits at the high end of the nickel range for iron meteorites.\u003c\/p\u003e\n\u003cp\u003eExternally, the specimens show the natural surface texture formed during atmospheric entry and subsequent weathering in the Egyptian desert. Regmaglypts, thumb-print-like depressions formed by ablation during flight, are often visible even on small fragments.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eUngrouped iron meteorites like Gebel Kamil do not fit cleanly into any of the established chemical groups defined by trace element composition. This makes them scientifically significant, they likely sample parent bodies not represented by the major iron meteorite groups. Gebel Kamil's high nickel content and ataxitic structure suggest an origin in a small, rapidly cooled metallic body. The associated impact crater is approximately 45 meters in diameter and is one of the youngest confirmed meteorite craters on Earth. Learn more about iron meteorite classification on our \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e page.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Gebel Kamil is an officially classified meteorite. See the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel+Kamil\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin entry for Gebel Kamil\u003c\/a\u003e. Every specimen ships with a Treasure Coast Meteorite Co. certificate of authenticity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does ungrouped ataxite mean?\u003c\/strong\u003e Ungrouped means the meteorite does not match the chemical fingerprint of any established iron meteorite group, it likely comes from a unique parent body. Ataxite refers to the internal structure: with very high nickel content, no Widmanstatten pattern forms, resulting in a fine-grained homogeneous metal texture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included?\u003c\/strong\u003e Your selected size specimen in an acrylic gift box, plus a Treasure Coast Meteorite Co. certificate of authenticity.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eGebel Kamil is one of the few iron meteorites with a confirmed, documented impact crater. That provenance, a known fall location, a visible crater, satellite-confirmed discovery, makes it historically significant beyond its classification. For collectors looking for an accessible entry point into iron meteorites, or an affordable gift for someone interested in space science, Gebel Kamil offers genuine scientific value at an approachable price point. Browse our full \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites collection\u003c\/a\u003e for additional specimens.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Gebel+Kamil\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Small","offer_id":44751913844783,"sku":"GEBEL-KAMIL-1.00G-INDIVIDUAL","price":10.0,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":44751913877551,"sku":"GEBEL-KAMIL-2.00G-INDIVIDUAL","price":15.0,"currency_code":"USD","in_stock":true},{"title":"Large","offer_id":44751913910319,"sku":"GEBEL-KAMIL-3.00G-INDIVIDUAL","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/IMG_6915.heic?v=1765326358"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-24-92g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 24.92g, Neumann Bands","description":"\u003ch2\u003eEtched slice from Estonia's Bronze Age impact crater\u003c\/h2\u003e\n\u003cp\u003eThis 24.92g slice from Kaalijärv shows the classic kamacite-taenite lamellae of an IAB-MG octahedrite after acid etching, with parallel Neumann bands cutting across the pattern. The bands appear as fine, straight lines within individual kamacite crystals, formed by mechanical twinning during the high-velocity impact that created the Kaali crater field approximately 3,500 years ago. The etched surface exposes the crystalline structure that developed during slow cooling in the parent body's core, now overprinted by shock deformation.\u003c\/p\u003e\n\u003cp\u003eKaalijärv material originates from the Kaali crater field on Saaremaa Island, Estonia, where nine impact craters mark a meteorite fragmentation event that occurred during the Bronze Age. The main crater measures 110 meters in diameter. This impact took place within the timeline of human settlement in the region, making Kaalijärv one of the few meteorite falls with potential archaeological and cultural connections. The meteorite fragments were first scientifically recognized in 1937, though local residents had collected iron-rich rocks from the site for centuries.\u003c\/p\u003e\n\u003cp\u003eThe specimen's weight and dimensions make it suitable for microscope examination of both the Widmanstätten structure and the shock features. The Neumann bands visible in this slice provide direct evidence of the violent deceleration forces experienced during atmospheric entry and ground impact.\u003c\/p\u003e\n\u003ch2\u003eWidmanstätten pattern and shock deformation features\u003c\/h2\u003e\n\u003cp\u003eAcid etching reveals the intergrowth of kamacite and taenite that characterizes iron meteorites. The lamellae width in this IAB-MG specimen falls within the medium octahedrite range, reflecting cooling rates of approximately 100 to 1,000 degrees Celsius per million years in the parent asteroid's metallic core. The pattern's clarity in this slice indicates proper etching technique and well-preserved crystal structure.\u003c\/p\u003e\n\u003cp\u003eNeumann bands appear as parallel lines within kamacite crystals, distinct from the Widmanstätten lamellae. These features form through mechanical twinning of the iron crystal lattice under shock pressures exceeding 130 kilobars. The bands in this specimen crosscut the kamacite plates at specific crystallographic angles, documenting the orientation of shock waves during impact. Multiple band orientations within a single crystal indicate complex loading during the meteorite's violent arrival.\u003c\/p\u003e\n\u003cp\u003eThe combination of primary igneous structure (Widmanstätten pattern) and secondary shock features (Neumann bands) makes this slice valuable for understanding both the thermal history of the parent body and the mechanical effects of hypervelocity impact.\u003c\/p\u003e\n\u003ch2\u003eScientific context of IAB meteorites\u003c\/h2\u003e\n\u003cp\u003eIAB meteorites belong to the Complex Iron group, which includes both magmatic and non-magmatic members. The IAB-MG subgroup shows evidence of crystallization from a metallic melt, consistent with formation in the core of a differentiated asteroid. Oxygen isotope studies suggest the IAB parent body may have experienced disruption and reassembly, creating a mixed population of core fragments and silicate-bearing material.\u003c\/p\u003e\n\u003cp\u003eThe presence of medium octahedrite structure indicates the metal cooled at depths sufficient to insulate it from rapid temperature changes, likely several kilometers below the parent body's surface. Shock features like Neumann bands were superimposed millions of years later during collisional events that eventually delivered fragments to Earth-crossing orbits. For collectors and researchers interested in how shock metamorphism affects extraterrestrial materials, see \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eKaalijärv represents a known fall with a specific crater field, allowing correlation between meteorite composition, shock features, and impact dynamics. This connection between the meteorite's internal structure and its terrestrial impact site provides constraints on entry velocity, fragmentation altitude, and energy deposition during the Bronze Age event.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Kaalijärv is classified as Iron IAB-MG in the Meteoritical Bulletin. You can verify the classification at the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin search page\u003c\/a\u003e. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are shock-induced deformation features in kamacite crystals, formed by mechanical twinning under pressures exceeding 130 kilobars. They appear as parallel lines within individual kamacite plates and provide direct evidence of the intense forces experienced during impact events. Their presence indicates the meteorite underwent significant shock metamorphism.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 24.92g and includes a certificate of authenticity. No display stand is included unless separately noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does Kaalijärv have both archaeological and geological significance?\u003c\/strong\u003e The Kaali impact occurred approximately 3,500 years ago during the Bronze Age, within the period of human settlement in Estonia. This timing makes Kaalijärv one of the few meteorite falls that may have been witnessed or documented in some form by ancient peoples. The preserved crater field allows study of both the meteorite's composition and the impact's effects on the local landscape and human activity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I display an etched iron meteorite?\u003c\/strong\u003e Store etched iron meteorites in low-humidity environments to prevent rust formation. Light mineral oil can protect the etched surface. Avoid touching the etched face directly, as skin oils accelerate corrosion. Display cases with desiccant packets help maintain stable conditions for long-term preservation of surface detail.\u003c\/p\u003e\n\u003ch2\u003eDocumented impact site material with visible shock features\u003c\/h2\u003e\n\u003cp\u003eKaalijärv occupies a specific niche in iron meteorite collections due to its association with a known, well-studied crater field and its occurrence within recorded human history. The combination of structural clarity in the Widmanstätten pattern and the presence of distinct Neumann bands makes this 24.92g slice useful for examination and display. The specimen documents both the slow cooling environment of an asteroid core and the violent shock event that created the Estonian crater field 3,500 years ago.\u003c\/p\u003e\n\u003cp\u003eCollectors seeking iron meteorites with visible shock features will find Kaalijärv material particularly relevant, as Neumann bands are not universally preserved or exposed in all etched specimens. The medium octahedrite structure provides clear kamacite plates for band visibility. For additional specimens showing impact-related features, see our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron IAB-MG | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44813909524527,"sku":"KAALIJARV-24.92G-SLICE","price":300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-iron-meteorite-24-92g-display-front.jpg?v=1777764196"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-33-38g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 33.38g, Neumann Bands","description":"\u003ch2\u003eBronze Age impact specimen with shock deformation features\u003c\/h2\u003e\u003cp\u003eThis 33.38g slice from the Kaalijärv impact site reveals Neumann bands cutting through kamacite lamellae within the classic Widmanstätten pattern. The bands appear as fine parallel lines crossing the broader octahedral structure, evidence of shock compression during the meteorite's violent arrival approximately 3,500 years ago. The etched surface exposes both features simultaneously: the geometric intergrowth of iron-nickel alloys formed during slow cooling in a parent body core, overlaid by deformation structures from terrestrial impact.\u003c\/p\u003e\u003cp\u003eKaalijärv material originates from a well-documented crater field on Saaremaa Island, Estonia. The impact occurred during the Bronze Age, within the timeline of human settlement in the region. This specimen preserves both its extraterrestrial metallurgy and the record of its collision with Earth.\u003c\/p\u003e\u003ch2\u003eOctahedral structure and shock features\u003c\/h2\u003e\u003cp\u003eThe Widmanstätten pattern results from kamacite and taenite crystallizing along octahedral planes as the parent body core cooled over millions of years. Etching with acid preferentially attacks kamacite, revealing the three-dimensional geometry as intersecting bands across the polished surface.\u003c\/p\u003e\u003cp\u003eNeumann bands are shock-induced deformation twins within kamacite crystals. They form when intense pressure causes the crystal lattice to deform along specific planes without melting. In this specimen, the bands cross the existing octahedral structure at angles, creating a secondary linear pattern distinct from the broader Widmanstätten lamellae. Their presence confirms shock pressures consistent with high-velocity impact.\u003c\/p\u003e\u003ch2\u003eIAB complex meteorites and differentiated parent bodies\u003c\/h2\u003e\u003cp\u003eIAB-MG (medium-coarsest octahedrite) iron meteorites belong to the IAB complex, a diverse group showing evidence of both igneous differentiation and impact disruption. Their parent body likely experienced partial melting and metal-silicate separation before catastrophic fragmentation mixed metallic and silicate components. The resulting mixture underwent slow cooling within reassembled debris, producing the octahedral structure visible in this specimen.\u003c\/p\u003e\u003cp\u003eIron meteorites represent the cores of ancient planetesimals that differentiated early in solar system history. These bodies formed within the first few million years after solar system formation, preserving metal alloy compositions and cooling rates that provide constraints on planetary accretion processes. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn About Meteorites\u003c\/a\u003e offers additional context on classification and formation environments.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Kaalijärv is classified as Iron IAB-MG in the Meteoritical Bulletin. Material from this locality has been studied extensively due to its association with the Saaremaa crater field. Verification: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMetBull search\u003c\/a\u003e. This specimen includes a certificate of authenticity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are planar deformation features within kamacite crystals, formed when shock compression causes the iron lattice to twin along specific crystallographic planes. They appear as fine parallel lines that cross the Widmanstätten pattern at characteristic angles. Their presence indicates shock pressures between 13 and 40 GPa, typical of high-velocity impacts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The listing includes the 33.38g etched slice and certificate of authenticity documenting classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat makes the Kaalijärv impact site scientifically significant?\u003c\/strong\u003e The crater field on Saaremaa preserves a well-dated Bronze Age impact event with material distributed across multiple craters. The chronology places the impact within human history, making it one of the few meteorite falls that occurred during documented settlement periods. The site provides data on small-body atmospheric entry and ground-level cratering processes.\u003c\/p\u003e\u003ch2\u003eDisplay quality and structural clarity\u003c\/h2\u003e\u003cp\u003eKaalijärv specimens with visible Neumann bands offer collectors both extraterrestrial metallurgical structure and terrestrial shock features in a single piece. The combination of octahedral geometry and linear shock deformation creates layered complexity across the etched surface. Material from this locality carries additional historical context through its association with a documented Bronze Age impact site.\u003c\/p\u003e\u003cp\u003eThis 33.38g slice provides clear visibility of both structural systems without requiring magnification. The surface preparation exposes intersecting features at angles that emphasize their geometric relationships. For collectors seeking shock-bearing iron meteorites with known impact histories, Kaalijärv material represents accessible entry into this subset. Browse additional options in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron IAB-MG | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44814184939567,"sku":"KAALIJARV-33.38G-SLICE","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-iron-meteorite-slice-33-38g-reverse.jpg?v=1777841127"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-28-56g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 28.56g, Neumann Bands","description":"\u003ch2\u003eEtched octahedrite with shock deformation features\u003c\/h2\u003e\n\u003cp\u003eThis 28.56g slice of Kaalijärv iron reveals sharp Neumann bands cutting across the kamacite lamellae. The linear shock features appear as parallel dark lines within the broader Widmanstätten pattern, evidence of the impact event that delivered this meteorite to Saaremaa Island approximately 3,500 years ago. The etched surface shows the intergrown kamacite and taenite structure characteristic of IAB-MG octahedrites.\u003c\/p\u003e\n\u003cp\u003eNeumann bands form when shock pressure exceeds the threshold for mechanical twinning in kamacite crystals. Their presence in this specimen confirms the meteorite experienced significant deformation during atmospheric entry and ground impact. The bands intersect the Widmanstätten pattern at angles determined by the kamacite crystal structure, creating a distinctive visual signature that distinguishes shocked material from unshocked irons.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe Widmanstätten pattern shows medium bandwidth kamacite plates separated by thin taenite ribbons, consistent with the IAB-MG classification. Cooling rates for this structural class indicate formation deep within a differentiated asteroid core where temperatures decreased slowly over millions of years.\u003c\/p\u003e\n\u003cp\u003eNeumann bands appear as fine parallel lines within individual kamacite crystals, oriented along specific crystallographic planes. These mechanical twins represent permanent deformation of the iron-nickel lattice structure. The bands cross-cut the primary Widmanstätten structure, indicating they formed after the meteorite's core crystallization was complete.\u003c\/p\u003e\n\u003cp\u003eThe etched surface texture results from differential acid attack on kamacite and taenite phases. Kamacite, with lower nickel content, etches more readily than the nickel-rich taenite, creating the relief pattern that makes both the Widmanstätten structure and Neumann bands visible to the eye.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eIAB iron meteorites are classified as complex irons, meaning they do not fit the simple fractional crystallization models that explain most iron meteorite groups. Members of the IAB complex show chemical and structural diversity suggesting formation in multiple parent body environments, possibly involving impact disruption and reassembly of a partially differentiated asteroid.\u003c\/p\u003e\n\u003cp\u003eKaalijärv material originates from a crater field on Saaremaa Island, Estonia, where at least nine impact structures formed during a single atmospheric breakup event. The largest crater measures 110 meters in diameter. Dating places the impact during the Bronze Age, making this one of the few meteorite falls that occurred during documented human history in the region. Archaeological evidence from the site suggests the craters held cultural significance for local populations.\u003c\/p\u003e\n\u003cp\u003eThe presence of Neumann bands indicates shock pressures between 13 and 40 gigapascals during impact. These features form only under specific stress conditions and provide direct evidence of the forces involved when the meteorite struck Earth's surface. Study of such shock features helps scientists understand impact dynamics and the mechanical properties of extraterrestrial materials. For detailed information on meteorite classification and shock features, 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. Kaalijärv is classified in the Meteoritical Bulletin as Iron IAB-MG. You can verify the classification at the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are parallel lines of mechanical twinning within kamacite crystals, formed when shock pressure causes the iron-nickel lattice to deform along specific crystallographic planes. They appear as fine dark lines crossing the Widmanstätten pattern and indicate the meteorite experienced shock pressures between 13 and 40 gigapascals during impact.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 28.56g etched meteorite slice and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the crater field significant?\u003c\/strong\u003e Kaalijärv represents one of few meteorite falls that occurred during documented human history. The Bronze Age impact created nine craters on Saaremaa Island, with the main crater measuring 110 meters across. Archaeological evidence suggests the site held cultural importance for local populations, making this material significant for both geological and historical study.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I handle and store this specimen?\u003c\/strong\u003e Iron meteorites are stable but can develop rust spots if exposed to moisture. Store in a dry environment and handle with clean, dry hands or cotton gloves. The etched surface should not be touched directly, as skin oils can accelerate oxidation. If surface oxidation develops, consult a meteorite preparation specialist rather than attempting chemical treatment.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eKaalijärv specimens with visible Neumann bands command collector interest due to the combination of structural clarity and shock features. Most etched iron meteorites display only the Widmanstätten pattern. Material showing both the primary cooling structure and secondary shock deformation provides educational value for understanding impact processes.\u003c\/p\u003e\n\u003cp\u003eThis 28.56g slice offers substantial display presence while remaining accessible for collectors building representative iron meteorite collections. The well-defined Neumann bands make this specimen suitable for study and photography, as the shock features photograph clearly against the Widmanstätten background.\u003c\/p\u003e\n\u003cp\u003eBronze Age impact material from a documented crater field carries historical context that enhances collecting appeal beyond purely geological specimens. Kaalijärv bridges meteorite science and human history, representing an impact event that occurred within the timeline of established European civilization. For additional iron meteorite specimens showing varied structural features, see our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" rel=\"noopener\" target=\"_blank\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron IAB-MG | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44814213644335,"sku":"KAALIJARV-28.56G-SLICE","price":340.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-iron-meteorite-slice-28-56g-reverse.jpg?v=1777839513"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-27-00g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 27.00g, Neumann Bands","description":"\u003ch2\u003eBronze Age impact site specimen with visible shock features\u003c\/h2\u003e\u003cp\u003eThis 27.00g slice from Kaalijärv reveals linear Neumann bands cutting through the kamacite lamellae of its Widmanstätten pattern. The bands appear as parallel lines that intersect the typical octahedral structure, documenting shock pressures from high-velocity collisions that preceded the meteorite's final impact on Saaremaa Island approximately 3,500 years ago.\u003c\/p\u003e\u003cp\u003eThe etched surface exposes the intergrown kamacite and taenite structure characteristic of medium octahedrites in the IAB complex. The presence of well-defined Neumann bands across multiple kamacite plates indicates shock metamorphism occurred while the parent body was still intact in space, prior to the atmospheric entry that created Estonia's Kaali crater field.\u003c\/p\u003e\u003ch2\u003eShock deformation structure\u003c\/h2\u003e\u003cp\u003eNeumann bands form when shock waves exceeding 13 GPa propagate through kamacite crystals, creating twin planes along specific crystallographic orientations. In this specimen, the bands manifest as straight, parallel features that maintain consistent orientation within individual kamacite lamellae but shift direction at taenite boundaries.\u003c\/p\u003e\u003cp\u003eThe Widmanstätten pattern itself formed during cooling rates of approximately 1-10°C per million years within the metallic core of a differentiated asteroid. The intersection of slow-cooled structure and rapid shock deformation creates the layered geological history visible in this slice.\u003c\/p\u003e\u003ch2\u003eIAB complex formation and crater field context\u003c\/h2\u003e\u003cp\u003eIAB-MG meteorites represent a medium octahedrite subgroup within the IAB complex, a non-magmatic iron group that likely formed through impact-melt processes rather than fractional crystallization. The parent body experienced catastrophic collisions that mixed metallic and silicate components before re-solidifying.\u003c\/p\u003e\u003cp\u003eKaalijärv material originates from the Kaali crater field impact, which occurred during the Bronze Age when human populations occupied the region. The nine-crater field on Saaremaa Island represents one of the youngest confirmed meteorite impact sites where material has been recovered and classified. To understand how impact structures preserve meteorite fragments, see \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 Kaalijärv is classified as Iron IAB-MG in the Meteoritical Bulletin. You can verify the classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMetBull database search\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are shock-induced deformation twins that form in kamacite when iron meteorites experience impact pressures above 13 gigapascals. They appear as parallel lines within individual kamacite crystals and serve as geological records of violent collisions in space.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 27.00g etched slice and certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow old is the Kaali impact?\u003c\/strong\u003e Radiocarbon dating and stratigraphic analysis place the Kaali crater field impact at approximately 3,500 years before present, during the Bronze Age. This makes it one of the youngest documented meteorite impact events with recovered material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the classification include \"MG\"?\u003c\/strong\u003e The MG designation indicates \"medium\" bandwidth in the octahedrite classification system, referring to kamacite lamellae widths between 0.5 and 1.3 millimeters. This structural parameter reflects the specific cooling history of this IAB complex specimen.\u003c\/p\u003e\u003ch2\u003eDocumented impact site material for iron collections\u003c\/h2\u003e\u003cp\u003eKaalijärv specimens combine structural iron meteorite features with direct association to a documented terrestrial impact site. The presence of Neumann bands adds a shock metamorphism component that distinguishes this material from unshocked IAB specimens.\u003c\/p\u003e\u003cp\u003eThis slice displays both the crystallization history recorded in its octahedral structure and the shock history preserved in its Neumann bands. The 27.00g format provides sufficient surface area to observe the intersection of multiple kamacite plates and their associated shock features. Collectors building comprehensive \u003ca href=\"\/collections\/iron-meteorites\"\u003eiron meteorite collections\u003c\/a\u003e value Kaalijärv material for its combination of known terrestrial context and visible shock deformation.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron IAB-MG | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44814228979759,"sku":"KAALIJARV-27.00G-SLICE","price":325.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-iron-meteorite-slice-iab-mg-neumann-bands-estonia-27g.heic?v=1774155398"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-38-39g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 38.39g, Neumann Bands","description":"\u003ch2\u003eEtched iron slice with visible shock features\u003c\/h2\u003e\n\u003cp\u003eThis 38.39g slice cuts through the kamacite and taenite crystal structure of Kaalijärv, an iron meteorite linked to a well-documented crater field on Saaremaa Island, Estonia. The slice has been acid-etched to reveal its internal architecture: intersecting kamacite lamellae form the classic Widmanstätten pattern, and within those plates run narrow parallel lines called Neumann bands. These bands represent mechanical twinning in the iron crystal lattice, a permanent record of the shock event that excavated the craters roughly 3,500 years before present.\u003c\/p\u003e\n\u003cp\u003eThe surface finish allows clear observation of both features under ambient light. The Neumann bands appear as dark, thread-like traces cutting across the lighter kamacite zones. Their orientation and density in this slice provide direct evidence of shock direction and intensity. Few iron meteorite specimens display Neumann bands this prominently at a weight class accessible to most collectors.\u003c\/p\u003e\n\u003cp\u003eThe slice measures approximately 75mm by 45mm and has been stabilized after etching to prevent oxidation. No stand is included.\u003c\/p\u003e\n\u003ch2\u003eStructure and features\u003c\/h2\u003e\n\u003cp\u003eThe Widmanstätten pattern forms when kamacite (low-nickel iron) exsolves from taenite (high-nickel iron) during cooling rates of approximately one to several hundred degrees Celsius per million years. This specimen cooled within the metallic core of a disrupted asteroid, allowing the nickel-iron alloy to crystallize along preferred octahedral planes. The resulting structure consists of kamacite plates separated by taenite ribbons, with plate widths in the medium range typical of IAB-MG octahedrites.\u003c\/p\u003e\n\u003cp\u003eNeumann bands are crystallographic twins produced when shock waves exceed the elastic limit of kamacite. The twins form on specific lattice planes and remain as permanent deformation features. In this slice, the bands run in multiple orientations, reflecting the complex stress field of the impact that formed the Kaalijärv crater field. The bands are most visible within the wider kamacite lamellae where etching contrast is strongest.\u003c\/p\u003e\n\u003cp\u003eThe slice also shows minor surface pitting and small inclusions of troilite (iron sulfide), common accessory phases in IAB irons. The etched surface has developed a light patina that enhances structural contrast without obscuring fine detail.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eIAB meteorites belong to a complex group of iron meteorites with heterogeneous compositions and structures. Unlike magmatic irons that crystallized from molten metal pools, IAB irons likely formed through impact melting and reassembly of silicate-metal mixtures on a partially differentiated parent body. This formation mechanism explains the chemical and textural diversity within the IAB group, which includes both coarse and fine octahedrites as well as silicate-bearing inclusions.\u003c\/p\u003e\n\u003cp\u003eKaalijärv material specifically represents the medium-grained (MG) subgroup, characterized by kamacite bandwidth and nickel content intermediate within the IAB range. The presence of well-developed Neumann bands indicates that this meteoroid experienced at least one significant shock event prior to atmospheric entry, possibly related to the same collisional history that eventually ejected it from the asteroid belt and sent it toward Earth.\u003c\/p\u003e\n\u003cp\u003eThe fall itself occurred during the Bronze Age, making it one of the youngest meteorite impact events with observable craters. Archaeological evidence suggests the impacts may have influenced local settlement patterns and cultural development. For collectors interested in the broader science of 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 Kaalijärv is classified in the Meteoritical Bulletin as an iron meteorite (IAB-MG octahedrite). You can verify this classification through the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\"\u003eMeteoritical Bulletin search\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its weight, classification, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are shock-induced deformation features in kamacite (low-nickel iron). When a meteorite experiences high-pressure impacts, the crystal lattice undergoes mechanical twinning along specific planes. These twins appear as parallel lines within individual kamacite plates after etching. They provide direct evidence of shock history and are scientifically valuable markers of impact processes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The specimen weighs 38.39g and includes a certificate of authenticity. No display stand is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I store an etched iron meteorite?\u003c\/strong\u003e Store in a low-humidity environment. Etched surfaces are more reactive to moisture than polished or natural surfaces. A silica gel pack in the storage container helps prevent oxidation. Light mineral oil applied to the surface provides additional protection but may slightly darken the patina.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is Kaalijärv significant to collectors?\u003c\/strong\u003e Kaalijärv is one of the few iron meteorites directly associated with a known crater field and a specific historical timeframe. The impact occurred within recorded human history, approximately 3,500 years before present. This connection between material sample and terrestrial impact site makes it both geologically and culturally notable.\u003c\/p\u003e\n\u003ch2\u003eCollector significance\u003c\/h2\u003e\n\u003cp\u003eIron meteorites with visible Neumann bands represent a small subset of available material. Most irons show only Widmanstätten structure; bands require specific shock conditions and favorable crystal orientation relative to the cut plane. This 38.39g slice offers both features at a size and price point accessible to intermediate collectors building reference collections of impact phenomena.\u003c\/p\u003e\n\u003cp\u003eKaalijärv also occupies a position between common witnessed falls and high-end rarities. The total known weight from the crater field is substantial enough to support availability, but etched slices with prominent shock features remain selectively distributed. Material from this locality has been held in institutional collections for decades, establishing its scientific pedigree.\u003c\/p\u003e\n\u003cp\u003eFor collectors building comprehensive iron meteorite reference sets, see our full \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron meteorite (IAB-MG octahedrite) | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44814229143599,"sku":"KAALIJARV-38.39G-SLICE","price":460.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-iron-meteorite-slice-iab-mg-neumann-bands-estonia-38-39g.heic?v=1774156498"},{"product_id":"kaalijarv-iron-meteorite-slice-with-neumann-bands-rare-iron-iab-mg-45-71g","title":"Kaalijärv Iron Meteorite Slice, IAB-MG, 45.71g, Neumann Bands","description":"\u003ch2\u003e45.71g slice preserves impact crater field history\u003c\/h2\u003e\u003cp\u003eThis 45.71g Kaalijärv slice comes from one of the few meteorites directly linked to a preserved crater field. The Kaali impact structure on Saaremaa Island, Estonia, formed approximately 3,500 years ago during the Bronze Age, creating nine craters when a single iron body fragmented during atmospheric entry. The main crater measures 110 meters in diameter and remains visible today, making this meteorite one of the youngest impact events with both material and terrestrial evidence available to collectors.\u003c\/p\u003e\u003cp\u003eThe specimen has been etched to reveal internal structure. Neumann bands cross the kamacite lamellae as fine parallel lines, recording shock pressures experienced during either the parent body disruption event or the terminal impact on Earth. These deformation features provide a readable record of the forces that shaped this iron's history from asteroid core to terrestrial crater field.\u003c\/p\u003e\u003ch2\u003eWidmanstätten pattern with shock deformation\u003c\/h2\u003e\u003cp\u003eAs an IAB-MG (medium-grained) octahedrite, this specimen displays the classic Widmanstätten pattern formed through extremely slow cooling within a differentiated asteroid core. Kamacite bands measuring several millimeters in width intersect at characteristic octahedral angles, bounded by thinner taenite ribbons. The crystalline structure reflects cooling rates of approximately 1-10 degrees Celsius per million years.\u003c\/p\u003e\u003cp\u003eNeumann bands appear as sets of parallel lines within individual kamacite crystals. These shock-induced twin lamellae form when iron crystals deform plastically under pressures exceeding 130 kilobars. Multiple band orientations visible in this slice indicate the material experienced complex shock loading, consistent with either a catastrophic parent body collision or the hypervelocity impact that formed the Estonian crater field. The bands contrast visibly against the etched kamacite surface.\u003c\/p\u003e\u003ch2\u003eIAB complex formation and parent body origin\u003c\/h2\u003e\u003cp\u003eThe IAB complex represents a diverse group of iron meteorites that cooled at varying rates within a disrupted and reassembled parent body. Unlike magmatic irons that crystallized from a homogeneous molten core, IAB irons contain silicate inclusions and show chemical variations suggesting formation through impact-generated melting rather than standard planetary differentiation. The MG structural classification indicates medium kamacite bandwidth resulting from intermediate cooling rates.\u003c\/p\u003e\u003cp\u003eCurrent models suggest the IAB parent body experienced a major collision early in solar system history, creating a mixed assemblage of metal and silicate that partially melted and subsequently cooled at different rates depending on fragment size and burial depth. This complex history distinguishes IAB meteorites from simpler magmatic iron groups. For more on iron meteorite classification and structure, see \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. Kaalijärv is classified as Iron IAB-MG in the Meteoritical Bulletin. You can verify the classification at \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMetBull search: Kaalijarv\u003c\/a\u003e. This specimen includes a certificate of authenticity with purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are Neumann bands?\u003c\/strong\u003e Neumann bands are parallel shock-induced deformation features that form within iron meteorite crystals when subjected to extreme pressure, typically above 130 kilobars. They appear as fine parallel lines crossing the kamacite structure and serve as a permanent record of impact events experienced by the meteorite.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 45.71g etched slice and a certificate of authenticity. No display stand is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the Kaalijärv fall significant?\u003c\/strong\u003e Kaalijärv is one of few meteorites with a preserved, dateable crater field. The Bronze Age impact on Saaremaa Island created visible craters still accessible today, making this material historically and geologically significant beyond its crystalline structure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I see the Widmanstätten pattern without magnification?\u003c\/strong\u003e Yes. The medium-grained structure of this IAB-MG octahedrite produces kamacite bands several millimeters wide, clearly visible to the naked eye on the etched surface. The Neumann bands require closer inspection but are visible without magnification under proper lighting.\u003c\/p\u003e\u003ch2\u003eStructural clarity and terrestrial impact context\u003c\/h2\u003e\u003cp\u003eIron meteorite collectors value Kaalijärv for its dual appeal: well-developed octahedral structure with visible shock features, combined with documented connection to a terrestrial impact site. The presence of Neumann bands in this slice adds scientific value, as these features provide direct evidence of the extreme forces iron meteorites experience during their violent histories. The medium grain size offers optimal visual clarity of both the Widmanstätten pattern and the superimposed deformation bands.\u003c\/p\u003e\u003cp\u003eAt 45.71g, this slice provides substantial display presence while remaining accessible for collectors building comprehensive iron meteorite representations. The etched surface reveals structural detail across the entire face, with multiple Neumann band orientations readable under examination. Material from this Estonian crater field appears less frequently in the market compared to larger iron falls, adding collecting interest to specimens with clear structural features. Browse additional etched iron specimens in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Kaalijarv\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eKaalijarv\u003c\/a\u003e | Classification: Iron IAB-MG | Find, Estonia, 1937\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":44814244085807,"sku":"KAALIJARV-45.71G-SLICE","price":550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/kaalijarv-45.71g-full-slice-display-stand-angle_45c39aa1-7747-4da6-b13b-5b94ef0c0d8e.jpg?v=1778629836"},{"product_id":"muonionalusta-meteorite-slice-292g","title":"Muonionalusta Iron Meteorite Slice, IVA Fine Octahedrite, 292.00g, Etched Widmanstätten Pattern","description":"\u003ch2\u003eEtched crystal structure from an asteroid core\u003c\/h2\u003e\n\u003cp\u003eThis 292.00g Muonionalusta slice displays the characteristic Widmanstätten pattern of an IVA fine octahedrite through chemical etching that reveals the internal nickel-iron crystal structure. The parallel kamacite lamellae intersect at consistent angles, creating geometric bands that formed during slow cooling in the metallic core of a differentiated asteroid over millions of years. The etching process dissolves kamacite at a faster rate than taenite, producing visible relief and contrast across the polished surface.\u003c\/p\u003e\n\u003cp\u003eThe slice measures substantial enough for display while maintaining clarity across the entire etched face. The pattern remains continuous from edge to edge, showing no significant oxidation or surface weathering that would obscure the crystallographic features. This specimen originated from material recovered in northern Sweden beginning in 1906, giving it both scientific classification and established provenance within the meteorite community.\u003c\/p\u003e\n\u003ch2\u003eKamacite lamellae and crystallographic orientation\u003c\/h2\u003e\n\u003cp\u003eThe Widmanstätten pattern visible on this slice represents the three-dimensional arrangement of kamacite plates within a taenite matrix, a structure that forms only under conditions of extremely slow cooling in space. The bandwidth, or spacing between kamacite lamellae, classifies Muonionalusta as a fine octahedrite with measurements typically between 0.5 and 1.0 millimeters. This narrow spacing produces a tightly woven pattern with high visual density.\u003c\/p\u003e\n\u003cp\u003eEtching with dilute acid preferentially attacks the kamacite phase, leaving taenite bands raised in relief. The resulting pattern follows the cubic crystal structure of the parent metal, with lamellae oriented along specific crystallographic planes. The angles where these bands intersect reflect the octahedral symmetry of the original crystal lattice, a feature that remains consistent across all properly oriented sections of the same meteorite.\u003c\/p\u003e\n\u003ch2\u003eFormation in a differentiated asteroid\u003c\/h2\u003e\n\u003cp\u003eIVA iron meteorites formed in the molten metallic core of a planetary body that underwent complete differentiation early in solar system history. As the core cooled at rates measured in degrees per million years, nickel and iron atoms migrated through the melt and crystallized into the ordered structure now visible in this slice. The slow cooling rate allowed large crystals to form and kamacite to exsolve from taenite along preferred crystallographic directions.\u003c\/p\u003e\n\u003cp\u003eCatastrophic collisions later fragmented the parent body, exposing core material to space and eventually delivering it to Earth as iron meteorite falls and finds. Muonionalusta represents one of these core fragments, offering direct evidence of planetary-scale melting, differentiation, and metal crystallization that occurred more than 4.5 billion years ago. For additional information on meteorite formation 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 Muonionalusta is classified in the Meteoritical Bulletin as an IVA fine octahedrite from Sweden. You can verify this classification through the official \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=16873\" rel=\"noopener\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the Widmanstätten pattern show?\u003c\/strong\u003e The Widmanstätten pattern is the visible expression of kamacite and taenite crystal orientations that developed during slow cooling in an asteroid core. The geometric bands represent kamacite plates that crystallized along octahedral planes in the original metal lattice. This structure forms only in meteoritic iron-nickel alloys and cannot be reproduced artificially under terrestrial conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 292.00g etched Muonionalusta slice and a certificate of authenticity. No display stand is included unless specifically noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the slice prepared?\u003c\/strong\u003e The slice has been cut, polished to a smooth surface, and chemically etched with dilute acid to reveal the internal crystal structure. Etching dissolves kamacite preferentially, creating relief between the kamacite and taenite phases that makes the Widmanstätten pattern visible to the eye.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is Muonionalusta significant to collectors?\u003c\/strong\u003e Muonionalusta combines clear IVA classification, a well-defined Widmanstätten pattern with fine bandwidth, and documented Swedish provenance dating to 1906. The etched pattern provides both visual appeal and direct evidence of crystallization processes in asteroid cores, making it scientifically and aesthetically valuable to collectors.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collection value\u003c\/h2\u003e\n\u003cp\u003eEtched iron meteorite slices serve as both display pieces and scientific specimens. The Widmanstätten pattern remains stable under normal indoor conditions, though light surface oxidation may develop over years of exposure to humidity. Collectors typically store iron meteorites in low-humidity environments or apply protective coatings to preserve the etched surface contrast.\u003c\/p\u003e\n\u003cp\u003eThis 292.00g slice provides sufficient size for clear pattern visibility while remaining practical for desktop or cabinet display. The continuous pattern from edge to edge and the absence of significant weathering give this specimen strong presentation quality. Muonionalusta's recognition within the collector community and its confirmed classification make it suitable for both new and established collections. View additional classified specimens in our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=16873\" rel=\"noopener\" target=\"_blank\"\u003eMuonionalusta\u003c\/a\u003e | Classification: Iron meteorite (IVA fine octahedrite) | Find, Sweden, 1906\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45081741590575,"sku":"MUONIONALUSTA-292.00G-SLICE-ETCHED","price":1395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/muonionalusta-iron-meteorite-slice-back-side-widmanstatten-pattern-292g.jpg?v=1780156003"},{"product_id":"muonionalusta-iron-meteorite-slice-330-81g","title":"Muonionalusta Iron Meteorite Slice, IVA Fine Octahedrite, 330.81g, Etched Widmanstätten Pattern","description":"\u003ch2\u003eGeometric crystalline structure across 330.81 grams\u003c\/h2\u003e\n\u003cp\u003eThis Muonionalusta slice weighs 330.81g and delivers clear visibility into the interlocking kamacite and taenite lamellae that define the IVA fine octahedrite structure. The etched surface reveals angular crystal boundaries and the geometric precision that results from millions of years of controlled cooling inside a differentiated asteroid. The pattern extends across the full face of the slice without significant interruption, offering both visual clarity and structural continuity.\u003c\/p\u003e\n\u003cp\u003eThe slice format provides direct access to the cross-section of the metallic body. Etching enhances the contrast between nickel-poor kamacite and nickel-rich taenite, making the Widmanstätten pattern visible under normal lighting. At this weight, the specimen balances display scale with structural detail, showing how kamacite plates intersect at consistent angles determined by the cubic crystal lattice of the parent metal.\u003c\/p\u003e\n\u003ch2\u003eWidmanstätten pattern and octahedrite classification\u003c\/h2\u003e\n\u003cp\u003eThe Widmanstätten pattern forms when molten nickel-iron alloy cools at rates between one and several hundred degrees Celsius per million years. Under these conditions, kamacite nucleates along the octahedral planes of the taenite crystal structure, creating parallel bands that intersect at 60- and 120-degree angles. This geometry is visible across the etched surface of this slice and reflects the internal symmetry of the original metallic crystal.\u003c\/p\u003e\n\u003cp\u003eIVA fine octahedrites contain kamacite bandwidth between 0.2 and 0.5 millimeters, a range that produces tight, visually dense patterning. The fine classification distinguishes Muonionalusta from coarser octahedrites and marks it as material that cooled slowly enough to allow crystal separation but quickly enough to prevent the formation of wider kamacite plates. Etching with acid removes material selectively, deepening the pattern and amplifying the contrast between crystal phases.\u003c\/p\u003e\n\u003ch2\u003eScientific context\u003c\/h2\u003e\n\u003cp\u003eMuonionalusta originates from the core of a differentiated asteroid that separated into layers of silicate mantle and metallic interior during the first few million years of solar system history. Collisional disruption exposed this core material and sent fragments into orbital trajectories that eventually intersected Earth. The meteorite's IVA classification places it within a group of iron meteorites that share chemical and structural similarities, indicating a common parent body.\u003c\/p\u003e\n\u003cp\u003eThe slow cooling rate preserved in the Widmanstätten pattern indicates that the parent body remained intact and insulated for millions of years after initial solidification. This cooling history allows researchers to model the thermal evolution of early planetary cores and understand how metal segregates under low-gravity conditions. For context on how these processes relate to meteorite formation broadly, 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 Muonionalusta is classified as an IVA fine octahedrite in the Meteoritical Bulletin. You can verify this classification through the \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=16873\" target=\"_blank\"\u003eMeteoritical Bulletin database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and provenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a fine octahedrite?\u003c\/strong\u003e Fine octahedrite refers to the bandwidth of kamacite lamellae in the Widmanstätten pattern. In IVA fine octahedrites like Muonionalusta, kamacite plates measure between 0.2 and 0.5 millimeters in width. This produces a tightly spaced, geometrically dense pattern that distinguishes fine octahedrites from medium and coarse varieties.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e This listing includes the 330.81g Muonionalusta slice and a certificate of authenticity. No display stand is included unless explicitly stated in the product variant description.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow was the Widmanstätten pattern revealed?\u003c\/strong\u003e The slice was cut from the meteorite mass, polished to a flat surface, and then etched with a mild acid solution. The acid differentially removes kamacite faster than taenite, creating depth contrast that makes the crystal structure visible. This process does not alter the meteorite's composition or authenticity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere was Muonionalusta found?\u003c\/strong\u003e Muonionalusta was recovered in Norrbotten County, Sweden, in 1906. It is a witnessed find with documented recovery history and remains one of the most widely recognized iron meteorites from Scandinavia.\u003c\/p\u003e\n\u003ch2\u003eDisplay and collector value\u003c\/h2\u003e\n\u003cp\u003eMuonionalusta holds consistent demand among collectors due to its visual clarity, well-documented classification, and the accessibility of its structural features. The etched Widmanstätten pattern provides immediate confirmation of extraterrestrial origin and demonstrates the slow-cooling conditions that characterized early asteroid cores. At 330.81g, this slice offers substantial mass without requiring specialized mounting or storage.\u003c\/p\u003e\n\u003cp\u003eThe specimen works well in collections focused on iron meteorites, asteroid-derived material, or geological processes visible at the macroscopic scale. The pattern remains stable after etching and does not require re-treatment under normal indoor conditions. For additional classified iron meteorite specimens with etched structures, explore our \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron 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=16873\" target=\"_blank\"\u003eMuonionalusta\u003c\/a\u003e | Classification: Iron meteorite (IVA fine octahedrite) | Find, Sweden, 1906\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45081817579567,"sku":"MUONIONALUSTA-330.81G-SLICE-ETCHED","price":1590.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/muonionalusta-iron-meteorite-iva-fine-octahedrite-large-slice-etched-widmanstatten-pattern-330-81g.heic?v=1779384800"},{"product_id":"muonionalusta-meteorite-slice-245-82g","title":"Muonionalusta Iron Meteorite Slice, IVA Fine Octahedrite, 245.82g, Etched Widmanstätten Pattern","description":"\u003ch2\u003eEtched crystalline structure from an asteroid core\u003c\/h2\u003e\u003cp\u003eThis 245.82g Muonionalusta slice displays the geometrically ordered Widmanstatten pattern characteristic of IVA fine octahedrites. The etched surface reveals parallel kamacite and taenite lamellae that intersected during extremely slow cooling in the metallic core of a differentiated asteroid over 4.5 billion years ago. The pattern's clarity across this slice provides direct visual access to the internal crystalline architecture of extraterrestrial metal.\u003c\/p\u003e\u003cp\u003eThe specimen's weight and surface area allow the full Widmanstatten geometry to develop across multiple crystal orientations. Etching has brought the structural contrast into sharp relief, defining the boundaries between adjacent crystal planes and highlighting the angular intersections that define octahedral symmetry. This slice preserves the metallurgical record of core formation in a body that differentiated early in solar system history.\u003c\/p\u003e\u003ch2\u003eKamacite and taenite crystallization\u003c\/h2\u003e\u003cp\u003eThe Widmanstatten pattern forms when molten nickel-iron alloy cools over millions of years in the zero-gravity environment of an asteroid's interior. Kamacite, the low-nickel phase, crystallizes along octahedral planes within the parent taenite structure. The resulting intergrowth produces geometric lamellae that intersect at consistent angles across the metallic matrix.\u003c\/p\u003e\u003cp\u003eEtching with dilute acid preferentially attacks kamacite, which recedes slightly relative to taenite. This differential response creates the three-dimensional relief visible on this slice. The pattern's consistency across the entire surface confirms that this material cooled as a single unified metallic body before fragmentation. Localized inclusions and minor surface texture variations document the specimen's terrestrial residence since recovery in 1906.\u003c\/p\u003e\u003ch2\u003eCore fragments from planetary differentiation\u003c\/h2\u003e\u003cp\u003eIVA iron meteorites represent material from the metallic core of a parent body that underwent complete differentiation during the first few million years of the solar system. Heating from short-lived radioactive isotopes melted the interior, allowing dense iron-nickel alloy to sink toward the center while silicate minerals migrated outward to form a mantle and crust. Subsequent catastrophic collisions exposed the core and ejected fragments into space.\u003c\/p\u003e\u003cp\u003eMuonionalusta's crystalline structure records cooling rates of only a few degrees per million years, consistent with burial deep within a body at least tens of kilometers in radius. The IVA group is chemically and structurally distinct from other iron meteorite classes, indicating it originated from a separate parent body with its own differentiation history. This specimen provides physical evidence of planetary-scale processes that operated during the earliest stages of terrestrial planet formation. For broader context on meteorite origins and identification, see \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 Muonionalusta is classified in the Meteoritical Bulletin as an IVA fine octahedrite from Sweden. You can verify this classification through the \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Muonionalusta\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMeteoritical Bulletin Database\u003c\/a\u003e. This specimen includes a certificate of authenticity documenting its classification, weight, and provenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does fine octahedrite mean?\u003c\/strong\u003e Fine octahedrite refers to the bandwidth of the kamacite lamellae in the Widmanstatten pattern. In fine octahedrites, kamacite bands measure between 0.5 and 1.0 millimeters in width. This places Muonionalusta in a specific structural category that reflects its cooling rate and nickel content, distinguishing it from coarse, medium, and finest octahedrites.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e You receive the 245.82g etched slice and a certificate of authenticity. No display stand is included unless separately confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow was the Widmanstatten pattern revealed?\u003c\/strong\u003e The slice was cut from bulk Muonionalusta material, then ground flat and polished to a mirror finish. Etching with dilute ferric chloride or nitric acid solution preferentially attacks the kamacite phase, causing it to recede relative to taenite. This differential etching produces the raised geometric pattern visible on the surface.\u003c\/p\u003e\u003ch2\u003eDisplay-grade iron meteorite for collectors\u003c\/h2\u003e\u003cp\u003eMuonionalusta remains one of the most visually distinctive iron meteorites available to collectors. The combination of strong pattern clarity, well-documented classification, and Swedish provenance makes it a foundational specimen for collections focused on iron meteorites or planetary differentiation. This 245.82g slice offers sufficient surface area to display the full geometric complexity of the Widmanstatten structure while remaining practical for cabinet or desk display.\u003c\/p\u003e\u003cp\u003eThe etched finish provides immediate visual impact and eliminates the need for additional surface preparation. Collectors seeking classified extraterrestrial metal with scientifically significant structure will find this specimen suitable for both display and study. For additional iron meteorite specimens with varied structures and classifications, explore our full \u003ca href=\"\/collections\/iron-meteorites\"\u003eIron Meteorites\u003c\/a\u003e collection.\u003c\/p\u003e\u003cp\u003eMeteoritical Bulletin entry: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.php?sea=Muonionalusta\u0026amp;sfor=names\" target=\"_blank\" rel=\"noopener\"\u003eMuonionalusta\u003c\/a\u003e | Classification: Iron meteorite (IVA fine octahedrite) | Find, Sweden, 1906\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45081826197551,"sku":"MUONIONALUSTA-245.82G-SLICE-ETCHED","price":1200.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/muonionalusta-iron-meteorite-slice-iva-fine-octahedrite-etched-widmanstatten-pattern-245-82g.heic?v=1779377942"},{"product_id":"gebel-kamil-550g-whole-shrapnel-iron-meteorite","title":"Gebel Kamil Iron Meteorite Individual, Ungrouped Ataxite, 550.00g, Impact Crater Specimen","description":"\u003ch2\u003eWhole shrapnel fragment from one of Earth's youngest impact craters\u003c\/h2\u003e\n\u003cp\u003eThis 550.00g Gebel Kamil whole shrapnel fragment preserves the structural signature of hypervelocity impact in unusually clear form. The specimen displays pronounced lizard skin texture across its outer surfaces, well-defined shear lines running through the metal, and rollover lips along the fragment edges where the iron plastically deformed during disintegration. The piece is intact and uncut, recovered from the strewnfield surrounding the 45-meter Kamil Crater in Egypt's southwestern desert, formed less than 5,000 years ago.\u003c\/p\u003e\n\u003cp\u003eThe visible features document the mechanics of the impact itself rather than atmospheric entry. The lizard skin surface forms the characteristic rough, dark-brown exterior of \u003ca href=\"\/collections\/gebel-kamil\"\u003eGebel Kamil shrapnel\u003c\/a\u003e, produced as the impactor disintegrated against the quartz-arenite target rock. Shear lines trace the curvilinear deformation bands that propagated through the mass during fragmentation, recording the direction and intensity of the shock event. Rollover lips along multiple edges show where ductile metal curled and folded as it tore away from neighboring fragments at impact.\u003c\/p\u003e\n\u003ch3\u003eAtaxite structure and composition\u003c\/h3\u003e\n\u003cp\u003eGebel Kamil is classified as an ungrouped \u003ca href=\"\/collections\/iron-meteorites\"\u003eiron meteorite\u003c\/a\u003e, a Ni-rich ataxite per the Meteoritical Bulletin No. 95 (Weisberg et al., 2010). Ataxites lack the crystalline Widmanstätten pattern characteristic of octahedrites, instead forming a fine-grained nickel-iron structure too Ni-rich for visible kamacite and taenite banding to develop under acid etching. Gebel Kamil specifically assays approximately 20 wt percent Ni, 0.75 wt percent Co, with unusually high Ge and Ga contents and a very fine-grained duplex plessite matrix.\u003c\/p\u003e\n\u003cp\u003eThe \"ungrouped\" designation means Gebel Kamil's bulk chemistry does not fall within any of the established iron meteorite chemical groups (IAB, IIAB, IIIAB, IVA, IVB, etc.). It derives from a distinct, otherwise-unrepresented parent body. Accessory mineral phases identified in Gebel Kamil include schreibersite, troilite, daubréelite, and trace native copper.\u003c\/p\u003e\n\u003ch3\u003eScientific context\u003c\/h3\u003e\n\u003cp\u003eThe Kamil Crater is one of the best-preserved young impact structures on Earth. Identified via Google Earth imagery in 2009 by V. De Michele, the crater was confirmed by Italian-Egyptian field expeditions in February 2009 and 2010, which recovered approximately 1.6 metric tons of meteoritic material from in and around the 45-meter structure. The crater excavates Cretaceous sandstone bedrock and remains exceptionally well preserved due to the hyperarid climate of the East Uweinat Desert.\u003c\/p\u003e\n\u003cp\u003eGebel Kamil represents a complete impact system: crater morphology, ejecta distribution, and the recovered impactor material itself. This correlation has enabled detailed reconstruction of impact velocity, angle, and energy release. The structure formed during human prehistory, less than 5,000 years ago, though no historical or archaeological records document the event. Gebel Kamil belongs to a small group of impact sites worldwide where the impactor has been recovered and formally classified. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn about meteorites\u003c\/a\u003e for further reading on crater formation and impact-recovered material.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Gebel Kamil is classified in the Meteoritical Bulletin as Iron, ungrouped (Ni-rich ataxite). You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=52031\" rel=\"noopener\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e. This specimen ships with a certificate of authenticity from Treasure Coast Meteorite Co. (IMCA #3323).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does ungrouped ataxite mean?\u003c\/strong\u003e Ataxites are iron meteorites with sufficiently high nickel content that visible Widmanstätten patterns do not form under standard etching. Ungrouped means Gebel Kamil's chemistry does not match any established iron meteorite group, indicating a distinct parent body in the asteroid belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is shrapnel, and how does it differ from a regmaglypted individual?\u003c\/strong\u003e Shrapnel refers to fragments produced when a meteorite disintegrates on impact rather than during atmospheric flight. Of the approximately 1.6 metric tons of Gebel Kamil recovered, almost all of it is shrapnel. Only a single 83 kg specimen was found as a complete regmaglypted individual. This piece is whole shrapnel: an intact, uncut fragment from the explosive impact, displaying the shear and rollover features that distinguish crater-recovered material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are shear lines and rollover lips?\u003c\/strong\u003e Shear lines are curvilinear bands of deformation that record the direction of shock propagation through the metal at the moment of impact. Rollover lips are folds and curls along fragment edges where the ductile nickel-iron deformed plastically as fragments separated. Both are hallmarks of hypervelocity impact disintegration and are found primarily in crater-recovered material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 550.00g Gebel Kamil whole shrapnel fragment, certificate of authenticity, and specimen card with full classification details. No display stand is included.\u003c\/p\u003e\n\u003ch3\u003eCollector significance\u003c\/h3\u003e\n\u003cp\u003eGebel Kamil occupies a position few \u003ca href=\"\/collections\/iron-meteorites\"\u003eiron meteorites\u003c\/a\u003e can match: a classified ungrouped specimen with confirmed crater association, recovered under controlled scientific survey, with visible structural evidence of the impact event itself. Whole shrapnel fragments at the 550g range, displaying clear lizard skin, well-defined shear lines, and intact rollover lips on a single uncut piece, are uncommon. Most material in this weight class has been cut down for slice production, making intact fragments increasingly difficult to source as the original recovery stock is dispersed.\u003c\/p\u003e\n\u003cp\u003eThe combination of mass, surface preservation, and structural detail on this fragment makes it both a strong display piece and a meaningful portfolio addition for collectors focused on crater-recovered material. Specimens from Gebel Kamil connect the buyer to a specific, identifiable geological event, a category of meteorite that remains a small minority of what has ever been classified.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=52031\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45328332488751,"sku":"GEBEL-KAMIL-550.00G-INDIVIDUAL","price":1100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/gebel-kamil-550g-shrapnel-fold-shear-detail.jpg?v=1779329747"},{"product_id":"seymchan-pallasite-meteorite-full-slice-pmg-591-00g-widmanstatten-pattern","title":"Seymchan Pallasite Meteorite Full Slice, PMG, 591.00g, Widmanstätten Pattern","description":"\u003ch2\u003e591g full slice from the iron-dominant zone with crisp Widmanstätten banding edge to edge\u003c\/h2\u003e\n\u003cp\u003eThis 591.00g Seymchan full slice is cut from the iron-dominant zone of the mass, presenting no olivine. The Widmanstätten pattern reads across the entire face without interruption. Kamacite bands are sharply delineated throughout, the geometric interlocking structure is consistent from edge to edge, and there is no significant oxidation compromising the etched surface. The specimen is large enough that the crystal geometry registers at a glance rather than requiring close inspection.\u003c\/p\u003e\n\u003ch3\u003eStructure and features\u003c\/h3\u003e\n\u003cp\u003eThe Widmanstätten pattern in this slice formed as the parent body cooled over millions of years deep inside a differentiated asteroid. The process produced an interlocking lattice of kamacite and taenite, two iron-nickel alloys that precipitate at different temperatures and lock into geometric bands as the system slowly equilibrates. The structure cannot be produced artificially and is one of the definitive indicators of iron meteorite authenticity. The banding width visible in this slice is consistent with Seymchan's structural identity as a coarse octahedrite, the classification it held prior to reclassification as a pallasite, and the geometry is uninterrupted across the full face.\u003c\/p\u003e\n\u003cp\u003eDue to Seymchan's heterogeneous internal structure, specimens fall into two distinct categories: those from olivine-bearing zones containing silicate crystal clusters, and those from iron-dominant zones consisting almost entirely of nickel-iron metal. This slice is from the iron-dominant zone. Both zone types are scientifically documented within the same classified meteorite.\u003c\/p\u003e\n\u003ch3\u003eScientific context\u003c\/h3\u003e\n\u003cp\u003eSeymchan was found in June 1967 by geologist F. A. Mednikov in the dry bed of the Hekandue river, a left tributary of the Yasachnaya in Magadan Oblast, Russia. The main mass of 272.3 kg was recovered during a geological survey. A second specimen of 51 kg was located nearby in October 1967. Both masses were turned over to the Academy of Sciences of the USSR. The meteorite was originally classified as an IIE anomalous coarse octahedrite.\u003c\/p\u003e\n\u003cp\u003eIn 2004, Dmitri Kachalin recovered additional material from the original find area, and approximately 20% of the new specimens were found to contain olivine crystals. This revealed the pallasitic nature of the mass. Van Niekerk et al. formally reclassified Seymchan as a pallasite in 2007. For further reading on pallasite formation and structure, see our guide: \u003ca href=\"\/pages\/what-is-a-pallasite\"\u003eWhat Is a Pallasite?\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Seymchan is classified in the Meteoritical Bulletin as Pallasite, PMG. You can verify the classification here: \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=23510\" target=\"_blank\"\u003eSeymchan\u003c\/a\u003e. This specimen ships with a certificate of authenticity from Treasure Coast Meteorite Co. (IMCA #3323).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does PMG mean?\u003c\/strong\u003e PMG stands for pallasite main group, the dominant chemical grouping among pallasites. Seymchan was reclassified from an IIE anomalous coarse octahedrite to PMG following the identification of olivine-bearing zones in recovered material studied by van Niekerk et al. (2007).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does this slice have no olivine if Seymchan is a pallasite?\u003c\/strong\u003e Seymchan is structurally heterogeneous. Some zones of the mass contain olivine crystal clusters; others consist almost entirely of nickel-iron metal. This slice is cut from an iron-dominant zone. Both zone types are authentic and represent the same classified meteorite.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat care does an etched iron meteorite slice require?\u003c\/strong\u003e Store in a low-humidity environment. Periodic application of Renaissance Wax or food-grade mineral oil to the etched face will slow oxidation. Avoid handling with bare hands and keep away from moisture sources.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 591.00g Seymchan full slice and a certificate of authenticity with full classification details from Treasure Coast Meteorite Co. (IMCA #3323).\u003c\/p\u003e\n\u003ch3\u003eCollector significance\u003c\/h3\u003e\n\u003cp\u003eFull slices of Seymchan at this size are not commonly available. Most material on the collector market comes as smaller partial slices, end cuts, or fragments. At 591g and over 20 cm in length, this specimen represents a substantial section of the mass. The full-slice format is what best displays Widmanstätten structure at scale, and in this specimen the geometry is uninterrupted from edge to edge with no significant oxidation or surface compromise. The iron-dominant zone is the material that most clearly expresses the structural identity established during Seymchan's original IIE octahedrite classification, and that structure is the primary visual feature of this slice.\u003c\/p\u003e\n\u003cp\u003eSeymchan occupies a specific position in the collector market as a pallasite with two visually distinct specimen types from the same classified mass. Collectors working across meteorite categories often target both. This slice represents the iron-dominant type in a format and at a size that is increasingly difficult to source as original stock is cut down and dispersed.\u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=23510\" target=\"_blank\"\u003eSeymchan\u003c\/a\u003e | Classification: Pallasite, PMG | Find, Russia, 1967\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45340333637679,"sku":"SEYMCHAN-591.00G-SLICE","price":2500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/seymchan-pallasite-591g-full-slice-widmanstatten-01.jpg?v=1779329566"},{"product_id":"gebel-kamil-iron-meteorite-individual-ungrouped-ataxite-1414-00g-impact-crater-specimen","title":"Gebel Kamil Iron Meteorite Individual, Ungrouped Ataxite, 1414.00g, Impact Crater Specimen","description":"\u003ch2\u003eWhole shrapnel fragment from one of Earth's youngest impact craters\u003c\/h2\u003e\n\u003cp\u003eAt 1414 grams, this is a substantial Gebel Kamil whole shrapnel fragment, large enough to fill the hand (see the in-hand image) and heavy in a way that smaller fragments simply are not. As the photographs show from several angles, the specimen carries pronounced lizard skin texture across its outer surfaces, well-defined shear lines running through the metal, and rollover lips along the fragment edges where the iron deformed plastically during disintegration. The piece is intact and uncut, recovered from the strewnfield surrounding the 45-meter Kamil Crater in Egypt's southwestern desert, a structure formed less than 5,000 years ago.\u003c\/p\u003e\n\u003cp\u003eThe macro images make these features easy to read, and they document the mechanics of the impact itself rather than atmospheric entry. The lizard skin surface forms the characteristic rough, dark-brown exterior of \u003ca href=\"\/collections\/gebel-kamil\"\u003eGebel Kamil shrapnel\u003c\/a\u003e, produced as the impactor disintegrated against the quartz-arenite target rock. Shear lines trace the curvilinear deformation bands that propagated through the mass during fragmentation, recording the direction and intensity of the shock event. Rollover lips along multiple edges show where ductile metal curled and folded as it tore away from neighboring fragments at impact.\u003c\/p\u003e\n\u003ch3\u003eAtaxite structure and composition\u003c\/h3\u003e\n\u003cp\u003eGebel Kamil is classified as an ungrouped \u003ca href=\"\/collections\/iron-meteorites\"\u003eiron meteorite\u003c\/a\u003e, a Ni-rich ataxite per the Meteoritical Bulletin No. 95 (Weisberg et al., 2010). Ataxites lack the crystalline Widmanstätten pattern characteristic of octahedrites, instead forming a fine-grained nickel-iron structure too Ni-rich for visible kamacite and taenite banding to develop under acid etching. Gebel Kamil specifically assays approximately 20 wt percent Ni, 0.75 wt percent Co, with unusually high Ge and Ga contents and a very fine-grained duplex plessite matrix.\u003c\/p\u003e\n\u003cp\u003eThe \"ungrouped\" designation means Gebel Kamil's bulk chemistry does not fall within any of the established iron meteorite chemical groups (IAB, IIAB, IIIAB, IVA, IVB, etc.). It derives from a distinct, otherwise-unrepresented parent body. Accessory mineral phases identified in Gebel Kamil include schreibersite, troilite, daubréelite, and trace native copper.\u003c\/p\u003e\n\u003ch3\u003eScientific context\u003c\/h3\u003e\n\u003cp\u003eThe Kamil Crater is one of the best-preserved young impact structures on Earth. Identified via Google Earth imagery in 2009 by V. De Michele, the crater was confirmed by Italian-Egyptian field expeditions in February 2009 and 2010, which recovered approximately 1.6 metric tons of meteoritic material from in and around the 45-meter structure. The crater excavates Cretaceous sandstone bedrock and remains exceptionally well preserved due to the hyperarid climate of the East Uweinat Desert.\u003c\/p\u003e\n\u003cp\u003eGebel Kamil represents a complete impact system: crater morphology, ejecta distribution, and the recovered impactor material itself. This correlation has enabled detailed reconstruction of impact velocity, angle, and energy release. The structure formed during human prehistory, less than 5,000 years ago, though no historical or archaeological records document the event. Gebel Kamil belongs to a small group of impact sites worldwide where the impactor has been recovered and formally classified. \u003ca href=\"\/pages\/learn-about-meteorites\"\u003eLearn about meteorites\u003c\/a\u003e for further reading on crater formation and impact-recovered material.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meteorite authenticated?\u003c\/strong\u003e Yes. Gebel Kamil is classified in the Meteoritical Bulletin as Iron, ungrouped (Ni-rich ataxite). You can verify the classification here: \u003ca href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=52031\" rel=\"noopener\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e. This specimen ships with a certificate of authenticity from Treasure Coast Meteorite Co. (IMCA #3323).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does ungrouped ataxite mean?\u003c\/strong\u003e Ataxites are iron meteorites with sufficiently high nickel content that visible Widmanstätten patterns do not form under standard etching. Ungrouped means Gebel Kamil's chemistry does not match any established iron meteorite group, indicating a distinct parent body in the asteroid belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is shrapnel, and how does it differ from a regmaglypted individual?\u003c\/strong\u003e Shrapnel refers to fragments produced when a meteorite disintegrates on impact rather than during atmospheric flight. Of the approximately 1.6 metric tons of Gebel Kamil recovered, almost all of it is shrapnel. Only a single 83 kg specimen was found as a complete regmaglypted individual. This piece is whole shrapnel: an intact, uncut fragment from the explosive impact, displaying the shear and rollover features that distinguish crater-recovered material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are shear lines and rollover lips?\u003c\/strong\u003e Shear lines are curvilinear bands of deformation that record the direction of shock propagation through the metal at the moment of impact, visible as the parallel ridges in the close-up images. Rollover lips are folds and curls along fragment edges where the ductile nickel-iron deformed plastically as fragments separated, seen along the torn edges in the macro shots. Both are hallmarks of hypervelocity impact disintegration and are found primarily in crater-recovered material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included with this specimen?\u003c\/strong\u003e The 1414 gram Gebel Kamil whole shrapnel fragment pictured, a certificate of authenticity, and a specimen card with full classification details. The display stand and scale cube shown in the photos are for scale and are not included.\u003c\/p\u003e\n\u003ch3\u003eCollector significance\u003c\/h3\u003e\n\u003cp\u003eGebel Kamil occupies a position few \u003ca href=\"\/collections\/iron-meteorites\"\u003eiron meteorites\u003c\/a\u003e can match: a classified ungrouped specimen with confirmed crater association, recovered under controlled scientific survey, with visible structural evidence of the impact event itself. At 1414 grams it sits well above the more common hand-sample fragments, giving it real presence as a display piece. Intact shrapnel fragments breaking the 1400 gram mark, and showing this much character at once, clear lizard skin, well-defined shear lines, and folded-over rollover lips on a single uncut piece, are decidedly scarce. A large share of the surviving material in this size class has been sliced for the slab trade, so a complete fragment of this heft becomes harder to find as the original recovery stock is dispersed.\u003c\/p\u003e\n\u003cp\u003eThe combination of mass, surface preservation, and structural detail on this fragment makes it both a strong display piece and a meaningful portfolio addition for collectors focused on crater-recovered material. Specimens from Gebel Kamil connect the buyer to a specific, identifiable geological event, a category of meteorite that remains a small minority of what has ever been classified.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMeteoritical Bulletin entry: \u003ca rel=\"noopener\" href=\"https:\/\/www.lpi.usra.edu\/meteor\/metbull.cfm?code=52031\" target=\"_blank\"\u003eGebel Kamil\u003c\/a\u003e | Classification: Iron (ungrouped, ataxite) | Find, Egypt, 2009\u003c\/p\u003e","brand":"Treasure Coast Meteorite Co.","offers":[{"title":"Default Title","offer_id":45408186564655,"sku":"GEBEL-KAMIL-1414.00G-INDIVIDUAL","price":2800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/files\/gebel-kamil-iron-meteorite-1414g-front-face-shear-lines.jpg?v=1780381160"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/9724\/9839\/collections\/iron-meteorites-collection-3-2-landscape.png?v=1766195390","url":"https:\/\/www.tcmeteorites.com\/collections\/iron-meteorites.oembed","provider":"Treasure Coast Meteorite Co.","version":"1.0","type":"link"}