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Name: |
cuprite (chalcotrichite) |
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Class: |
Oxide/Hydroxides |
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Chemistry: |
CuO2 copper oxide |
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Color(s): |
deep red, carmine red, red-brown, sometimes gray-black |
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Hardness: |
3.5 - 4 |
SpecGrav: |
5.8 - 6.2 |
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Fracture: |
conchoidal |
Cleavage: |
complete |
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Crystal: |
Isometric (often octahedral and twinned,surface growths, sometimes acicular) fibrous material often called chalcotrichite |
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Envronment: |
found in oxidized zone of copper deposits, hydrothermal sulfide veins, and sometimes in aggregates. |
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Association: |
copper, malachite, azurite, chrysocolla, limonite |
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Locals: |
| Tennessee, Arizona, USA | Bolivia | Mexico | Japan | Australia | Germany | |
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Misc: |
Scientific name comes from the Latin "cuprum", meaning copper. It's nickname is "ruby copper" from old miners. Pseudomorphs of malachite after cuprite a fairly common. |
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Photos |
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