Mineral description : Covellite

Covellite on copper ore in feldspar from Pahtoavaare.

Mineral class	Sulphides : Chalcocite group.
Chemical formula	CuS
Crystal system	Hexagonal.
Habitus	Platy or foliated. Often powdery to crusty surfaces.
Cleavage	[0001] Perfect, brittle fracture.
Hardness	1.5
Density	4.6-4.76
Color	Indigo blue with iriscens. Opaque.
Streak	Black
Luster	Adamantine.
Description
Occurance	As a surface alteration on other copper minerals.
Associates	Bornite, Chalcopyrite, Chalcosite.
Notes	Type locality : Mt Vesuvius, Napoli, Campania, Italy. Named after the italian mineralogist Niccola Covelli (1790-1829).
Locations	A rare mineral in Sweden Boliden, Västerbotten. Only in small quantities. Stekenjokk, Lappland. Only in small quantities. Bastnäs, Riddarhyttan, Västmanland. Nordmark, Värmland. Falu mine, Dalarna.

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