Pyrite

Pyrite Rock

FeS2 (sulfide)
Color: pale yellow
Streak: greenish black
Hardness: 6–6 1/2
Specific gravity: 5.0
Cleavage: indistinct
Fracture: conchoidal to uneven
Luster: metallic
Crystal form: cubic, crystal faces, often striated
Transparency: opaque
Gives off sparks when struck with a hard metal object. Found in igneous, metamorphic, and sedimentary rocks as an accessory mineral. May be found in hydrothermal veins. Also known as fool's gold.

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