Colavi Mine, Colavi subdistrict, Potosí, Bolivia - A very good example of the very rare Antimony Oxide, Valentinite. The specimen has sharp prismatic crystals of Valentinite atop massive Galena up to 0.6 cm. Minor chips here and there, but still a good example of a very rare species. Overall size is 2.1 x 2.0 x 1.7 cm.