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Copper is a soft metal often used in jewelry. It is used in making bronze, brass, and gold alloys. Fine specimens only rarely demonstrate crystal faces and these are prized above otherwise similar specimens.
Cu - Elemental Copper
Class
Group:
Gold
Light pink to copper-red, it darkens and covers green to black in air.
Red
Metallic
Opaque
8.9
2.5 - 3
None
Hackly
Cubic crystals and it's combinations, dendritic aggregates, sheets, slabs, massive.
Non-fluorescent
Frequency:
Common
Origin:
Primary hydrothermal copper is mainly related to basic igneous rocks, it is also common as a product of supergene cementation. It is associated with azurite, malachite, silver, chalkocite, bornite, and other minerals

Occurence:
Keweenaw Peninsular, Lake Superior; Tsumeb, Namibia; Chessy, France; Bisbee, Morenci, Arizona
Application:
Electronics, electrical engineering, ingredient in gold alloys, ore, and as a mineral specimen.

 
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