Chalcopyrite on Dolomite - Tsumeb Mine, Namibia

Chalcopyrite on Dolomite - (upper levels) Tsumeb Mine, Otjikoto Region, Namibia
50 x 32 x 24mm    37gms
 
Collected in the 1920's from the upper levels of the Tsumcorp Pit, the specimen consists of grey weathered dolomite with a large prominent Chalcopyrite crystal(s)on the matrix. 
It may not be the prettiest of rocks, however it is to be noted that Chalcopyrite crystals this large for this zone in the mine is extremely unusual and they are normally much smaller. The Chalcopyrite is 11 x 5mm in size.
Ex. Colleen Thomson Collection