Property |
Specification |
Chemical Formula |
CuFeS₂ (Chalcopyrite), Cu₂S (Chalcocite), CuO (Copper Oxide) |
Copper Content |
20% - 50% (depending on ore type) |
Color |
Yellowish-bronze, reddish-brown, greenish, or black |
Hardness (Mohs Scale) |
3 - 4 |
Density |
2.6 - 8.9 g/cm³ (varies with type) |
Crystal System |
Tetragonal (Chalcopyrite), Orthorhombic (Chalcocite) |
Luster |
Metallic to sub-metallic |
Cleavage |
Poor to imperfect |
Fracture |
Uneven to conchoidal |
Streak |
Greenish-black (Chalcopyrite), Dark brown to black (CuO) |
Transparency |
Opaque |
Refractive Index |
N/A |
Specific Gravity |
4.0 - 8.9 |
Solubility |
Insoluble in water |
Magnetic Properties |
Non-magnetic (except some ores containing magnetite) |