Iron Meteorite Fragment

Physical Properties

Hardness: 4.0-5.0 on Mohs scale; Color: Metallic silver-grey with brownish-orange rust (oxidized iron); Luster: Low-metallic to dull; Crystal structure: Isometric (widmanstätten patterns often present in internal matrix); Specific Gravity: 7.0-8.0; Cleavage: None (highly ductile).

Formation & Geological History

Formed in the molten cores of planetary embryos or large asteroids that differentiated. Their age is typically 4.5 billion years, dating back to the formation of the early Solar System. They are exposed when a large asteroid is shattered by a collision.

Uses & Applications

Primarily used for high-end scientific research, educational specimens, niche jewelry (sliced and etched), and high-value collecting. Historically, iron meteorites were used to forge early tools and weapons before the Iron Age.

Geological Facts

Iron meteorites represent only about 5% of observed falls but are common in collections because they survive atmospheric entry better and are easier to find with metal detectors. They consist primarily of the minerals Kamacite and Taenite.

Field Identification & Locations

Identify by high weight density (very heavy for its size), strong magnetic attraction, and the presence of a dark 'fusion crust' or metallic silver interior if scratched. Often found in dry desert climates or Arctic regions where they stand out against the landscape.

Identified on: 4/25/2026

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