Dioptase, Duftite & Calcite, Tsumeb, Namibia (Ex Prosper J. Williams)

Nice combination of dark green dioptase, light green duftite ad gray calcite, all of which are crystallized. The largest dioptase is almost 3 mm. Wonderful to inspect under magnification. Former inventory of Prosper J. Williams accompanied by one of his labels. From Tsumeb, Namibia. Dimensions: 3 x 8 cm