mineral
Native Copper (Tumbled Nugget)
Cu (Native Element)
AI-generated identification · may be incorrectHardness: 2.5-3 on Mohs scale; Color: reddish-orange, brownish with dark patina; Luster: metallic; Crystal structure: isometric/cubic; Specific gravity: 8.96; Malleable and ductile.
- Hardness
- 2
- Color
- reddish-orange, brownish with dark patina
- Luster
- metallic
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Physical properties
Hardness: 2.5-3 on Mohs scale; Color: reddish-orange, brownish with dark patina; Luster: metallic; Crystal structure: isometric/cubic; Specific gravity: 8.96; Malleable and ductile.
Formation & geological history
Formed in primary hydrothermal deposits or secondary oxidation zones of copper sulfide ore bodies. Major occurrences formed during Precambrian and Paleozoic epochs.
Uses & applications
Used widely in electrical wiring, plumbing, electronics, alloys like bronze and brass, lapidary arts, wire-wrapped jewelry, and mineral collecting.
Geological facts
Native copper is one of the few metallic elements that occurs naturally in an uncombined, pure form. Michigan's Keweenaw Peninsula is world-famous for massive native copper deposits.
Field identification & locations
Identified by its high density, metallic copper-red color, malleability, and dark oxidized surface coating. Frequently found in riverbeds or near ancient volcanic Basalt flows.
