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Freibergite

#49110

Freibergite

#49110
Availability
Sold
Size
12 x 15 x 12 cm - Cabinet 
Formula
Ag6Cu4Fe2Sb4S13 (RRUFF)
Locality
Equity mine, Bulkley Valley of the Northern Interior , British Columbia, Canada
Tagged
ore mineral , sulfide , copper , silver

Freibergite is the Ag-dominant analogue of Tetrahedrite. This is a very large and heavy specimen and may require additional postage. One side of the specimen is sawed and polished. The Freibergite can be seen on the polished end as nearly engulfing the entire host rock. Freibergite typically contains anywhere from 22 to 46% Copper and up to 17% Silver. 

There are some fantastic crystals to 0.75mm in one area.

Freibergite

Formula
Ag6Cu4Fe2Sb4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
gray, steel gray, black 
Streak
reddish black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 

Data courtesy of Webmineral.

Collection
Chris van Laer Collection

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