mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 on the 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 the 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 conditions, including sedimentary, igneous, and metamorphic rocks, typically through hydrothermal veins or sedimentary deposition in low-oxygen environments.
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
Often called 'Fool's Gold' due to its superficial resemblance to gold; however, pyrite is much harder, brittle, and leaves a greenish-black streak.
Field identification & locations
Easily identified by its brassy yellow color, metallic luster, high hardness (scratches glass), and greenish-black streak. Found worldwide, notably in Peru, Spain, and the United States.
