Mushistonite, Kesterite
Xuebaoding Mt., Pingwu County, Sichuan Province, China
Thumbnail, 2.7 x 2.4 x 1.9 cm

A significantly large crystal of this rare species, which come at their best from this locality. The light green coating atop is the even more rare species, mushistonite (once called wrongly "pandaite" when first discovered)