mineral

Iron Meteorite

Siderite (Iron-Nickel Alloy)

Hardness: 4-5 Mohs; Color: Metallic silver-grey when cut, dark brown/black crust; Lustre: Metallic; Structure: Octahedrite (Widmanstätten pattern); Specific Gravity: 7-8.

Hardness: 4-5 Mohs
Color: Metallic silver-grey when cut, dark brown/black crust

Identified May 23, 2026More mineral →

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Physical properties

Hardness: 4-5 Mohs; Color: Metallic silver-grey when cut, dark brown/black crust; Lustre: Metallic; Structure: Octahedrite (Widmanstätten pattern); Specific Gravity: 7-8.

Formation & geological history

Formed in the cores of differentiated planetary bodies or large asteroids approximately 4.5 billion years ago. Exposed by massive collisions in space and eventually fallen to Earth.

Uses & applications

Scientific research into the early solar system, high-end jewelry (watch dials, rings), and prized collectible specimens.

Geological facts

The geometric Widmanstätten patterns seen on etched surfaces cannot be replicated in a lab because they require millions of years of extremely slow cooling in space.

Field identification & locations

Identified by high density, magnetic properties, and presence of a fusion crust. Found globally, often in arid regions like deserts or Antarctica where they are easier to spot.