Rock Identifier
Iron meteorite fragment (probable) (Fe–Ni metallic meteorite, commonly octahedrite (kamacite–taenite)) — meteorite
meteorite

Iron meteorite fragment (probable)

Fe–Ni metallic meteorite, commonly octahedrite (kamacite–taenite)

AI-generated identification · may be incorrect

Silvery-gold metallic luster, irregular rough surface, and high apparent density are consistent with meteoritic iron, though slag or pyrite is also possible. Mohs hardness is typically 4–5 for iron meteorites; nickel–iron alloys are opaque, magnetic, and lack cleavage.

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Physical properties

Silvery-gold metallic luster, irregular rough surface, and high apparent density are consistent with meteoritic iron, though slag or pyrite is also possible. Mohs hardness is typically 4–5 for iron meteorites; nickel–iron alloys are opaque, magnetic, and lack cleavage.

Formation & geological history

Formed in the metallic cores of differentiated asteroids roughly 4.56 billion years ago, then delivered to Earth as impact fragments. The image alone cannot confirm extraterrestrial origin.

Uses & applications

Primarily a collector specimen; cut and etched examples may display Widmanstätten patterns and are used in jewelry and displays. Iron meteorites have scientific value for studying early planetary formation.

Geological facts

A strong magnet, density near 7–8 g/cm³, and a clean etched cut surface support identification; a fusion crust may occur but is not always preserved. Pyrite and industrial slag can look similar.

Field identification & locations

Common finds occur in dry deserts and Antarctica; documented provenance and laboratory testing (nickel content, elemental chemistry, and petrography) are essential. Avoid relying on color alone.