copper ore

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)