mineral
Pyrite
Iron Pyrite (FeS2)
Brassy yellow color, metallic luster, isometric crystal structure, Mohs hardness of 6 to 6.5, specific gravity around 4.9 to 5.2, greenish-black streak, uneven or conchoidal fracture.
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Physical properties
Brassy yellow color, metallic luster, isometric crystal structure, Mohs hardness of 6 to 6.5, specific gravity around 4.9 to 5.2, greenish-black streak, uneven or conchoidal fracture.
Formation & geological history
Forms in hydrothermal veins, metamorphic rocks, sedimentary deposits, and as a primary mineral in igneous rocks via precipitation from sulfur-rich solutions.
Uses & applications
Historically used as an ignition source in firearms, a source of sulfur and sulfuric acid production, semiconductor research, and widely collected as an ornamental mineral specimen.
Geological facts
Often nicknamed Fool's Gold due to its bright metallic yellow appearance resembling real gold. Unlike real gold, pyrite is brittle and leaves a dark greenish-black streak when scratched on porcelain.
Field identification & locations
Identified by its brassy metallic luster, cubic or pyritohedral cleavage/striations, and high hardness. Commonly found worldwide, including Peru, Spain, Italy, and the United States.
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