igneous
Iron Meteorite (Individual)
Siderite (composed of Kamacite and Taenite minerals)
Hardness: 4.5-5.5 | Color: Dark brown to black (fusion crust) or metallic silver (when cut) | Luster: Metallic | Crystal structure: Octahedral or hexahedral | Specific Gravity: 7.0 - 8.0 (vibrant/heavy for its size)
- Hardness
- 4
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Physical properties
Hardness: 4.5-5.5 | Color: Dark brown to black (fusion crust) or metallic silver (when cut) | Luster: Metallic | Crystal structure: Octahedral or hexahedral | Specific Gravity: 7.0 - 8.0 (vibrant/heavy for its size)
Formation & geological history
Formed in the molten cores of differentiated asteroids roughly 4.5 billion years ago. These extraterrestrial rocks were ejected via massive collisions and eventually fell to Earth.
Uses & applications
High-value collector items, scientific research into the early solar system, and artisanal jewelry (watches, rings with Widmanstätten patterns).
Geological facts
Iron meteorites represent the cores of shattered planetesimals. When etched with acid, they reveal the 'Widmanstätten pattern,' an interlocking crystal structure that cannot be replicated on Earth because it requires millions of years of slow cooling.
Field identification & locations
Identify in the field by its high density (feels much heavier than it looks), strong magnetism, and presence of 'regmaglypts' (thumbprint-like indentations). Common strewn fields include Campo del Cielo in Argentina or Canyon Diablo in Arizona.
