mineral
Native Copper
Copper (Cu)
Mohs hardness: 2.5 to 3; Color: Copper-red, often tarnished with green (malachite) or brown; Luster: Metallic; Crystal System: Isometric; Cleavage: None, exhibits hackly fracture; Specific Gravity: 8.9
- Hardness
- 2
- Color
- Copper-red, often tarnished with green (malachite) or brown
- Luster
- Metallic
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Physical properties
Mohs hardness: 2.5 to 3; Color: Copper-red, often tarnished with green (malachite) or brown; Luster: Metallic; Crystal System: Isometric; Cleavage: None, exhibits hackly fracture; Specific Gravity: 8.9
Formation & geological history
Formed as a hydrothermal mineral filling cracks and vesicles in basaltic lava flows or through secondary processes in oxidized zones of copper deposits.
Uses & applications
Extensively used for electrical wiring, plumbing, manufacturing coins, and alloys like bronze and brass; also sought after by mineral collectors.
Geological facts
Native copper can be found in massive multi-ton chunks, such as those historically mined in the Keweenaw Peninsula of Michigan.
Field identification & locations
Easily identified by its characteristic reddish-copper color, high density (heavy for its size), and metallic luster. Commonly found in Michigan, Arizona, and parts of Chile.
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