Copper vs Pyrite
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| Property | Copper | Pyrite |
|---|---|---|
| Formula | Cu | FeS2 |
| Crystal System | Cubic (Isometric) | Cubic (Isometric) |
| Mineral Class | 01 Native Elements | 02 Sulfides and Sulfosalts |
| Mohs Hardness | 2.5-3.0 | 6.0-6.5 |
| Color | Copper-red, tarnishes to brown/green | Pale brass-yellow |
| Luster | Metallic | Metallic |
| Streak | Copper-red | Greenish-black to brownish-black |
| Transparency | Opaque | Opaque |
| Cleavage | None | Indistinct |
| Fracture | Hackly | Conchoidal to uneven |