M Frigerio (by M Cole)
Mar 17, 2017
Being brown / black presumed from the Yaogangxian Mine, Yaogangxian W-Sn ore field, Yizhang Co., Chenzhou Prefecture, Hunan Province, China. Size is : 105 x 40 x 39 mm - Shortwave
Courtesy Marco Frigerio - Classic Rocks and Gems