San Jose Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
Toenail, 3.1 x 3.0 x 2.5 cm
This piece features some very large, lustrous, dark silvery brass colored, twinned crystals of the rare copper iron tin sulfide Stannite. The Stannite crystals are virtually as large as individual crystals of Stannite get from any locality in Bolivia. A final touch to these crystals is the fact that they have a minor association silvery colored Andorite crystals growing on top of the Stannites!