Minerals identify

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Fletcherite

Sulfide mineral,thiospinel group,spinel structural group

Fletcherite is a rare thiospinel sulfide mineral with formula Cu(Ni,Co) 2S 4. It is an opaque metallic steel gray mineral which crystallizes in the cubic crystal system. It is a member of the linnaeite group.

It was first described in 1977 for an occurrence in the Fletcher Mine, Viburnum Trend (New Lead Belt), near Centerville, Reynolds County, Missouri

It occurs as a dissemination within copper sulfide minerals in mineralization replacing dolomite at the type locality in the Fletcher mine where it is associated with vaesite , chalcopyrite. In an occurrence in Kalgoorlie it is found in black slate

Identification

Color of mineral

Grey
White

Mohs scale ( mineral hardness )

5

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Cubic