mineral
Pyrite
Iron Pyrite (FeS2)
Metallic luster, pale brass-yellow to brassy color, Mohs hardness 6.0-6.5, isometric crystal system, high specific gravity (~5.0), greenish-black streak, brittle tenacity.
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Physical properties
Metallic luster, pale brass-yellow to brassy color, Mohs hardness 6.0-6.5, isometric crystal system, high specific gravity (~5.0), greenish-black streak, brittle tenacity.
Formation & geological history
Forms in a wide variety of geological environments including hydrothermal veins, sedimentary rocks, metamorphic facies, and igneous formations.
Uses & applications
Historically used as a source of sulfur and sulfuric acid. Today popular in mineral collections, ornamental carvings, and costume jewelry.
Geological facts
Famous for its nickname 'Fool's Gold' because its brassy metallic look often tricked novice gold prospectors. Pyrite can spark when struck against steel.
Field identification & locations
Identify in the field by its metallic luster, golden hue, dark streak, and cubic or pyritohedral crystal faces. Found globally, notably in Peru, Spain, and the USA.
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