mineral
Pyrite (Polished Palm Stone)
Iron disulfide (FeS2)
AI-generated identification · may be incorrectMohs hardness 6–6.5, brass-yellow to metallic silver-gray color, brilliant metallic luster, isometric crystal system, high specific gravity (~5.0).
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Physical properties
Mohs hardness 6–6.5, brass-yellow to metallic silver-gray color, brilliant metallic luster, isometric crystal system, high specific gravity (~5.0).
Formation & geological history
Formed in hydrothermal veins, metamorphic rocks, and sedimentary environments via precipitation of iron and sulfur rich fluids.
Uses & applications
Commonly carved and engraved into pocket stones, jewelry, paperweights, and used historically to produce sulfuric acid.
Geological facts
Known as 'Fool's Gold' due to its superficial resemblance to gold, though it is much harder, more brittle, and lighter.
Field identification & locations
Identified by high density, metallic luster, brassy hue, and greenish-black streak on an unglazed ceramic tile. Major deposits exist in Peru, Spain, and the USA.
