mineral
Pyrite
Iron Sulfide (FeS2)
Hardness: 6-6.5 on Mohs scale; Color: Pale brass-yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Indistinct; Specific Gravity: 4.8-5.0
- Hardness
- 6-6
- Color
- Pale brass-yellow
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: Pale brass-yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Indistinct; Specific Gravity: 4.8-5.0
Formation & geological history
Forms in a wide variety of geological processes, ranging from magmatic segregation to hydrothermal veins, and as a diagenetic replacement mineral in sedimentary rocks like shales and coal beds.
Uses & applications
Historically used to strike fire, currently used in the manufacture of sulfur and sulfuric acid, and popular among mineral collectors and in jewelry.
Geological facts
Commonly known as 'Fool's Gold' due to its superficial resemblance to gold, pyrite frequently forms striking cubic or pyritohedral crystals.
Field identification & locations
Distinguished from gold by its significantly lower specific gravity, higher hardness (it cannot be scratched by a coin), brittle tenacity, and dark greenish-black streak.
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