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Berzelianite in Calcite

#50981

Berzelianite in Calcite

#50981
Availability
Sold
Size
4 x 3 x 1 cm - Miniature 
Formula
Cu2-xSe (x~0.12) (RRUFF)
Locality
Skrikerum mine, Valdemarsvik, Östergötland, Sweden
Tagged
copper

Black inclusions of rare Berzelianite in Calcite matrix.

Berzelianite

Formula
Cu2-xSe (x~0.12) 
Crystal System
Isometric 
Crystal Habit
Dendritic, Disseminated, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
bluish gray, gray, black 
Streak
shining 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness

Data courtesy of Webmineral.

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