mineral

Iron Meteorite

Siderite (Iron-Nickel Alloy)

Hardness: 4.0-5.0 on Mohs scale; Color: Metallic grey to brown; Luster: Metallic; Crystal Structure: Isometric (typically octahedrite); Cleavage: None (may show Widmanstatten patterns when etched); Specific Gravity: 7.0-8.0

Hardness: 4
Color: Metallic grey to brown
Luster: Metallic

Identified June 20, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the molten cores of differentiated planetary bodies or asteroids billions of years ago. These reach Earth after surviving atmospheric entry, often displaying a dark 'fusion crust'.

Uses & applications

Highly prized by scientific collectors and museums; used in jewelry (etched slices) and high-end watches; provide geological data on the early solar system.

Geological facts

Most iron meteorites are fragments from the cores of ancient asteroids that were shattered by impacts. They are far more resistant to weathering than stony meteorites.

Field identification & locations

Identify in the field by high density (heavy for its size), strong magnetic attraction, and the presence of regmaglypts (thumbprint-like indentations) on the surface. Find a professional lab to confirm nickel content.