mineral
Likely pyrite-bearing rock fragment
Pyrite (FeS₂), possibly in a weathered host rock; identification is uncertain from the image
AI-generated identification · may be incorrectSmall, rough brown-gray fragment with a few brassy metallic-looking patches. Pyrite has Mohs hardness 6–6.5, metallic luster, and a cubic crystal structure; the specimen’s visible properties are insufficient to confirm it.
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Physical properties
Small, rough brown-gray fragment with a few brassy metallic-looking patches. Pyrite has Mohs hardness 6–6.5, metallic luster, and a cubic crystal structure; the specimen’s visible properties are insufficient to confirm it.
Formation & geological history
Pyrite forms in diverse settings, including hydrothermal veins and sedimentary rocks; its age depends on the deposit. The fragment’s geological age and host material cannot be determined visually.
Uses & applications
Pyrite is collected and studied as an ore mineral and is sometimes used decoratively; it is not typically a practical gemstone.
Geological facts
Pyrite is iron disulfide, often called fool’s gold, but this small specimen does not show enough detail to establish that it is pyrite.
Field identification & locations
Check for distinctly brassy color, metallic luster, and hardness greater than a steel knife; avoid relying on color alone. Pyrite occurs worldwide, but provenance is unknown here.
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