Copper
Cu
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Native copper was one of the first metals used by humans, with artifacts dating back over 10,000 years. It occurs in basaltic lava flows and sandstone deposits. The Keweenaw Peninsula in Michigan produced enormous masses of native copper.
| Crystal System | Cubic (Isometric) |
| Mineral Class | 01 Native Elements |
| Mohs Hardness | 2.5-3.0 |
| Specific Gravity | 8.90 |
| Color | Copper-red, tarnishes to brown/green |
| Luster | Metallic |
| Streak | Copper-red |
| Cleavage | None |
| Fracture | Hackly |
| Transparency | Opaque |
| Crystal Habit | Dendritic, massive, wire-like |
Mohs Hardness
Mohs Hardness: 2.5 – 3.0
1 Soft10 Hard
Crystal System
Cubic (Isometric)Frequently Asked Questions
What is the hardness of Copper?
Copper has a Mohs hardness of 2.5-3.0.
What crystal system does Copper belong to?
Copper crystallizes in the Cubic (Isometric) crystal system.
What color is Copper?
Copper is typically Copper-red, tarnishes to brown/green.
What type of luster does Copper have?
Copper exhibits a Metallic luster.
What is the chemical formula of Copper?
The chemical formula of Copper is Cu.