mineral
Pyrite in Quartz
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 6-6.5 for pyrite, 7 for quartz. Color: Brass-yellow metallic patches within a white/gray matrix. Luster: Metallic for pyrite, vitreous for quartz. Crystal System: Isometric for pyrite, trigonal for quartz. Specific gravity: ~5.0 for pyrite, 2.65 for quartz.
- Hardness
- 6-6
- Color
- Brass-yellow metallic patches within a white/gray matrix
- Luster
- Metallic for pyrite, vitreous for quartz
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Physical properties
Hardness: 6-6.5 for pyrite, 7 for quartz. Color: Brass-yellow metallic patches within a white/gray matrix. Luster: Metallic for pyrite, vitreous for quartz. Crystal System: Isometric for pyrite, trigonal for quartz. Specific gravity: ~5.0 for pyrite, 2.65 for quartz.
Formation & geological history
Formed in hydrothermal veins and metamorphic environments where iron-rich fluids precipitate sulfide minerals alongside silica, often dating from various geological eras.
Uses & applications
Used as a mineral specimen for collectors, in jewelry, and historically as a source of sulfur and iron.
Geological facts
Pyrite is commonly known as 'Fool's Gold' due to its brassy metallic luster and golden hue, which has historically fooled many prospectors.
Field identification & locations
Can be identified by its distinctive metallic brass-yellow color, high specific gravity, and lack of true gold malleability. Commonly found worldwide in association with quartz veins.
