mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs scale. Color: Pale brass-yellow to golden. Luster: Metallic. Crystal Structure: Isometric/Cubic. Cleavage: Indistinct. Specific Gravity: ~5.0.
- Hardness
- 6-6
- Color
- Pale brass-yellow to golden
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 Mohs scale. Color: Pale brass-yellow to golden. Luster: Metallic. Crystal Structure: Isometric/Cubic. Cleavage: Indistinct. Specific Gravity: ~5.0.
Formation & geological history
Forms in a variety of environments including sedimentary deposits, metamorphic rocks, and hydrothermal veins. It often crystallizes from sulfur-rich fluids.
Uses & applications
Historically used for fire-starting and sulfur production. Today used for sulfuric acid industrial production, as a minor iron ore, and as a popular specimen for collectors and jewelry.
Geological facts
Commonly known as Fool's Gold due to its resemblance to precious metals. It is unique among minerals for being able to create sparks when struck against steel.
Field identification & locations
Identified by its brassy color, high density, and greenish-black streak (real gold has a yellow streak). Found globally, with famous deposits in Spain, Italy, and Peru.
