SPHALERITE -  ZnS,  ZINC SULFIDE. Good grouping of minerals, quartz and Sphalerite. Sphalerite is black grouping of crystals with mirror finish face,and some stratification. Good textbook form and each crystal is clearly shown. No Damage. From Yao Gan Xian, Wolfram Mine, Yizhang, Hunan Province, China. Size is (6.6cm) 2-5/8"w x (6.6cm) 2-5/8"d x (3.8cm) 1-1/2"h. Item CM0053.