mineral

Iron Meteorite

Siderite (meteoritic iron, Fe-Ni alloy)

Hardness: 4.0-5.0 on Mohs scale; Color: Silvery-grey to black fusion crust; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 7.0-8.0 (very dense)

Hardness: 4
Color: Silvery-grey to black fusion crust
Luster: Metallic

Identified June 7, 2026More mineral →

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Physical properties

Hardness: 4.0-5.0 on Mohs scale; Color: Silvery-grey to black fusion crust; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 7.0-8.0 (very dense)

Formation & geological history

Formed in the molten cores of planetary embryos or asteroids approximately 4.5 billion years ago. They reach Earth after survived atmospheric entry which creates regmaglypts (thumbprint-like indentations) and a fusion crust.

Uses & applications

Highly prized by collectors and researchers for studying the early solar system. Used historically for tool making and currently in high-end jewelry (Widmanstatten pattern slices).

Geological facts

Iron meteorites consist mostly of kamacite and taenite minerals. When etched with acid, they often reveal the Widmanstatten pattern, a unique interlocking crystal structure that cannot be replicated on Earth.

Field identification & locations

Identify by extreme density (weight), strong magnetic attraction, and the presence of a thin, dark fusion crust. Often found in deserts or Antarctica where they stand out against the landscape.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic