- Small Cabinet, 3.5 x 2.8 x 2.4 cm
- Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
- Ex. Paul Zerfass
A thick tabular, brilliant metallic cogwheel crystal of bournonite from the famed Yaogangxian mine in China. This impressive, large, single crystal exhibits striated prism faces along with pinacoid and pyramid faces that display subtle growth hillocks adding to the reflectivity. Minor edge rubbing and local patches of less reflective areas that are inconsequential to this great crystal. Ex. Paul Zerfass collection with label.