mineral

Iron-Nickel Meteorite fragment

Siderite (meteoritic iron), composed primarily of Kamacite (α-(Fe,Ni)) and Taenite (γ-(Fe,Ni))

AI-generated identification · may be incorrect

Hardness: 4.0-5.0 (Mohs); Color: Dark gray/black exterior with metallic silver interior; Luster: Metallic; Crystal context: Octahedrite pattern; Specific Gravity: 7.0-8.0; Magnetic property: Strongly magnetic.

Hardness: 4
Color: Dark gray/black exterior with metallic silver interior
Luster: Metallic

Identified May 15, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the molten cores of asteroid bodies during the early formation of the solar system approximately 4.5 billion years ago. They are ejected during planetary collisions and survive atmospheric entry.

Uses & applications

Scientific research, jewelry (pendants/rings), and high-value private collections.

Geological facts

Iron meteorites are the sources of the first iron used by humans before the Bronze Age. The interior of many iron meteorites exhibits a Widmanstätten pattern when etched with acid.

Field identification & locations

Identify by its extreme weight (density), strong attraction to magnets, and dark fusion crust. Often found in arid deserts or Antarctic ice fields where they are easier to spot against the landscape.