Bournonite – Crystal Floater from the Yaogangxian Mine


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This bournonite is from the Yaogangxian Mine, Xaogangxian W-Sn Ore Field, Tizhang, Chenzhou Prefecture, Hunan Province of China. Tungsten and tin are the primary minerals extracted from multiple ore bodies in an area spanning 4 x 2.5 km. Seventy-eight different species of minerals are found there Including bornonite. It is a lead sulfide that contains the elements Pb, Cu, Sb and S. This specimen is a complex bournonite crystal with gogwheel-like characteristics (photo 3). They silver grey color and a sub-metallic luster. The piece is terminated on all sides and is free of matrix – a “floater”.¬† This piece is a small miniature¬† that measures 1 1/8 x 7/8 x 3/8 inches or 28 x 22 x 12 mm.

Additional information

Weight5 oz

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