Apatite vs Chalcopyrite
| Property | Apatite | Chalcopyrite |
|---|---|---|
| Formula | Ca5(PO4)3(F,Cl,OH) | CuFeS2 |
| Crystal System | Hexagonal | Tetragonal |
| Mineral Class | 08 Phosphates, Arsenates, and Vanadates | 02 Sulfides and Sulfosalts |
| Mohs Hardness | 5.0 | 3.5-4.0 |
| Color | Green, blue, yellow, violet, colorless | Brass-yellow, often with iridescent tarnish |
| Luster | Vitreous | Metallic |
| Streak | White | Greenish-black |
| Transparency | Transparent | Opaque |
| Cleavage | Poor {0001} | Poor |
| Fracture | Conchoidal to uneven | Conchoidal to uneven |