meteorite
Likely iron meteorite
Iron–nickel meteorite, commonly octahedrite (kamacite–taenite)
AI-generated identification · may be incorrectDense, dark gray-brown metallic body with rounded fusion-crust-like surface and probable oxidation; metallic luster, hardness about 4–5 Mohs, high specific gravity (~7–8), and typically magnetic. The cavity and embedded-looking fragments may reflect weathering, impact damage, or artificial alteration, so identification…
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Physical properties
Dense, dark gray-brown metallic body with rounded fusion-crust-like surface and probable oxidation; metallic luster, hardness about 4–5 Mohs, high specific gravity (~7–8), and typically magnetic. The cavity and embedded-looking fragments may reflect weathering, impact damage, or artificial alteration, so identification from the image is uncertain.
Formation & geological history
Iron meteorites are differentiated asteroid cores or metal-rich fragments, crystallized billions of years ago and later excavated by impacts; their outer fusion crust formed during atmospheric entry. Terrestrial iron slag or industrial metal is an important alternative.
Uses & applications
Collected as meteorites, displayed, and occasionally cut/polished for jewelry; not generally used structurally because specimens are valuable or irregular.
Geological facts
A true iron meteorite commonly reveals a Widmanstätten pattern after cutting, polishing, and acid etching, and should contain nickel. Strong magnetism alone does not prove meteoritic origin because slag and industrial iron can also be magnetic.
Field identification & locations
Look for a thin dark fusion crust, regmaglypts, unusual density, and nickel-rich metal; test with a magnet, streak, and laboratory nickel/elemental analysis, while avoiding destructive testing. Common finds include Campo del Cielo (Argentina), Sikhote-Alin (Russia), and Canyon Diablo (Arizona).