Cuprite

Formula	Cu1+ 2 O
Origin	Tsumeb Mine (Namibia)
Description	large single crystal with grown copper crystals
Classification (Lapis)	Oxides
Crystal System	cubic
Hardness	3,5 – 4,0
Colour	cochineal-red, ruby-red, purplish red, to nearly black
Streak	brownish red
Luminescence	none observed
Luster	submetallic
Transparency (Opacity)	transparent to translucent
Cleavage	interrupted
Fracture	conchoidal
Magnetism	negative
Geological Setting	a common mineral in the oxidized portions of many copper deposits
Specific Gravity	6,14 g/cm3