igneous
Iron Meteorite (likely an Individual specimen)
Iron Meteorite (Group IAB, IIAB, IIIAB, etc., Fe-Ni alloy)
Hardness: 4-5 on Mohs scale; Color: Dark brown to black (fusion crust) or metallic silver-grey; Luster: Metallic; Crystal process: Widmanstätten pattern (octahedrites) when etched; Specific Gravity: 7.0-8.0
- Hardness
- 4-5 on Mohs scale
- Color
- Dark brown to black (fusion crust) or metallic silver-grey
- Luster
- Metallic
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Physical properties
Hardness: 4-5 on Mohs scale; Color: Dark brown to black (fusion crust) or metallic silver-grey; Luster: Metallic; Crystal process: Widmanstätten pattern (octahedrites) when etched; Specific Gravity: 7.0-8.0
Formation & geological history
Formed in the molten cores of asteroids that were shattered by impacts in the early solar system, roughly 4.5 billion years ago. They reach Earth after traveling through interplanetary space.
Uses & applications
Predominantly used for scientific research and as highly prized collector's items. Larger specimens may be used in jewelry (slices) or high-end watch dials.
Geological facts
Iron meteorites are much rarer than stony meteorites but easier to find because they are distinctly heavy and magnetic. They represent the core materials of ancient planetary bodies.
Field identification & locations
Identify in the field by high density (very heavy for its size), strong attraction to magnets, and the presence of regmaglypts (thumbprint-like indentations) or a dark fusion crust.
