Bournonite from Yaogangxian Mine, China

Dimension: 3.1cm x 2.3cm x 2.1cm
Weight: 39g
Locality: Yaogangxian Mine, Yizhang Co., Hunan Province, China
 
This is an intergrowth pair of metallic, prismatic and elongated crystals of Bournonite!  It is very reflective due to its highly striated prism faces.  A rare and brilliant mineral from the world-renowned Yaogangxian Mine.