Rock Identifier
Polished star-shaped meteorite slice (likely iron meteorite) (Iron meteorite, principally kamacite (α-Fe–Ni) with taenite (γ-Fe–Ni)) — meteorite
meteorite

Polished star-shaped meteorite slice (likely iron meteorite)

Iron meteorite, principally kamacite (α-Fe–Ni) with taenite (γ-Fe–Ni)

AI-generated identification · may be incorrect

Dark metallic brown-gray, highly reflective polished surface, dense and opaque; Mohs hardness about 4–5, metallic luster, cubic metallic crystal structure, and no cleavage. The star shape appears human-cut, not natural crystal morphology.

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Physical properties

Dark metallic brown-gray, highly reflective polished surface, dense and opaque; Mohs hardness about 4–5, metallic luster, cubic metallic crystal structure, and no cleavage. The star shape appears human-cut, not natural crystal morphology.

Formation & geological history

Formed from a differentiated asteroid’s metallic core and crystallized as it cooled over millions of years, commonly producing Widmanstätten patterns when etched. Most iron meteorites formed roughly 4.5 billion years ago.

Uses & applications

Used as collectible specimens, jewelry, display pieces, and scientific samples; value depends strongly on verified meteorite identity, locality, weight, and etched pattern.

Geological facts

The image alone cannot confirm extraterrestrial origin: polished iron or steel can look similar. A genuine iron meteorite is unusually heavy and typically reveals interlocking Widmanstätten figures after careful etching.

Field identification & locations

Check for very high density, nickel by laboratory analysis, and a fusion crust or etched Widmanstätten pattern; a magnet is attracted, but many terrestrial irons also attract magnets. Common sources include Campo del Cielo, Sikhote-Alin, and Canyon Diablo.