Bournonite crystals belong to the orthorhombic form of short columnar and plate, brittle, with metallic luster, often Chenggang grey to dark grey.
车轮矿晶体,属斜方晶系,呈短柱状和板状,性脆,具有金属光泽,常呈钢灰色至暗铅灰色。
It is generally recognized in the international mineral gemstone collectors, bournonite specimens of Yaogangxian produced with bedrock, intact, crystal large, gentle color, are rare treasures.