Physical Properties |
|
| Chemical formula | Cu |
| Class | Native element |
| Crystal system | Cubic |
| Habit | Cubic Octahedral Dodecahedral Crystals are usually malformed, dendritic, arborescent, or in irregular plates, scales, or masses. |
| Color | Copper-red Rose-red |
| Hardness | 2.5 to 3 |
| Specific gravity | 8.7 to 8.9 |
| Cleavage | None |
| Fracture | Hackly |
| Luster | Metallic |
| Transparency | Opaque |
| Streak | Copper-red |
| Twinning | Contact Penetration |
| after Perkins, 353-354 |
Copper in Hand Sample
Native copper
Native copper in Catoctin Formation metabasalt