Cassiterite vs Chalcopyrite
| Property | Cassiterite | Chalcopyrite |
|---|---|---|
| Formula | SnO2 | CuFeS2 |
| Crystal System | Tetragonal | Tetragonal |
| Mineral Class | 04 Oxides and Hydroxides | 02 Sulfides and Sulfosalts |
| Mohs Hardness | 6.0-7.0 | 3.5-4.0 |
| Color | Brown, black, reddish-brown, yellow | Brass-yellow, often with iridescent tarnish |
| Luster | Adamantine | Metallic |
| Streak | White to pale brown | Greenish-black |
| Transparency | Translucent | Opaque |
| Cleavage | Poor {100} | Poor |
| Fracture | Subconchoidal to uneven | Conchoidal to uneven |