Native Copper

Mineral	Native Copper
Formula	Cu
Origin	Dzhezkazgan Mine (Kasachstan)
Description	branched copper crystal
Classification (Lapis)	Elements
Crystal System	Cubic
Hardness	3,0
Colour	Pale rose on fresh surface, quickly darkens to copper-red
Streak	pale red metallic
Luminescence	none observed
Lustre	Metallic
Transparency (Opacity)	Opaque
Cleavage	none
Fracture	Hackly
Magnetism	not magnetic
Geological Setting	Commonly associated with porous zones in mafic extrusive rocks
Specific Gravity	8,92 g/cm3