mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
AI-generated identification · may be incorrectHardness: 3.5 to 4 on the Mohs scale. Color: Brass-yellow, often with a colorful iridescent tarnish (peacock ore). Luster: Metallic. Crystal Structure: Tetragonal. Cleavage: Indistinct. Specific Gravity: 4.1 to 4.3.
- Hardness
- 3
- Luster
- Metallic
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Physical properties
Hardness: 3.5 to 4 on the Mohs scale. Color: Brass-yellow, often with a colorful iridescent tarnish (peacock ore). Luster: Metallic. Crystal Structure: Tetragonal. Cleavage: Indistinct. Specific Gravity: 4.1 to 4.3.
Formation & geological history
Forms in hydrothermal vein deposits, pegmatites, and sedimentary rock sequences associated with igneous intrusions.
Uses & applications
Primary ore of copper; used as a mineral specimen for collectors.
Geological facts
Often called 'fool's gold' due to its brassy metallic look, though it is softer and more greenish-yellow than pyrite.
Field identification & locations
Found worldwide in copper-bearing ore deposits. Identified by its brassy yellow color and characteristic iridescent tarnish.
