Dioptase on Smithsonite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Beautiful dioptase crystals widely scattered over the entire surface of matrix coated by white to tan colored smithsomite crystals.  5.8 x 3.8 x 1.7 cm with a slightly domical form.  Great condition with only a very tiny crystal showing damage.  Tough to even notice this.  Great example!   $375