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1.3" Indigo-Blue Covellite Formation - Butte, Montana
This is a 1.3" wide formation of indigo-blue covellite that was collected from the Leonard Mine in the Butte Mining District of Butte, Montana. There is a small spot of red coloration along one side of this specimen.
Covellite is a copper sulfide mineral with the basic chemical formula CuS. Well-formed covellite crystals are considered rare: most examples are found in massive forms. It typically exhibits an iridescent effect with a lustrous indigo-blue color and occasional spots of red. Covellite commonly formsas a secondary mineral in copper sulfide deposits. Butte, Montana and Tuscany, Italy are two locations that have produced exceptional covellite crystal specimens.
SPECIES
Covellite
LOCATION
Leonard Mine, Butte Mining District, Butte, Montana.
SIZE
1.3" wide
CATEGORY
ITEM
#127008
