- San Jose Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
- Thumbnail, 2.6 x 2.5 x 1.8 cm
These specimens came out of this mine in 2005 and are among some of my favorite "new finds" from Bolivia. This piece features some very large, semi lustrous, sharp, dark "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. Ex. Brian Kosnar.