Mineral description : Tenorite

Black tenorite on chrysocolla from Pahtohavare.

Mineral class	Oxides : Cuprite - Zincite - Tenorite group
Chemical formula	CuO
Crystal system	Triclinic
Habitus	Scaly, clay like or massive.
Cleavage	None.
Hardness	3.5 - 4
Density	6.5
Color	Black to steel gray, opaque.
Streak	Black.
Luster	Dull.
Description
Occurance	As a secondary copper mineral in copper deposits.
Associates	Other secondary copper minerals.
Notes	I have found two type localities!!!, I'll better check this out.(check crystal system too) Type locality : Bisbee, Arizona, USA. Type locality : Vesuvio (Vesuvius), Napoli, Campania, Italy. Approved by IMA in 1960. Named after the Italian botanist, M. Tenor (1781-1861).
Localities	A rare mineral in Sweden Pahtohavare, Kiruna, Lappland. As black fillings in fractures in crysocolla. Viscaria, Kiruna, Lappland.

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If you have some questions, suggestions or comments you are welcome to write me a line or two.