Tenorite
Chemical Formula	CuO
Species	Oxides & Hydroxides
Crystal System	Monoclinic
Mohs Scale	3
Specific Gravity	6.5
Color	Steel-gray, iron-gray, black
Streak	Black
Luster	Metallic
Diaphaneity	Opaque
Cleavage	Poor/IndistinctIn zones and
Fracture	Irregular/Uneven, Conchoidal
Crystal Habit：Lathlike crystals, curved, scaly, dendritic; commonly pulverulent, earthy, massive
Geological Setting：In the oxidized zone of copper deposits, also as volcanic sublimate.