Dioptase      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  2.2 x 1.5 x 1 cm.  Outstanding translucence to transparency.  No damage.  Form is spectacular and the crystal size is also very respectable.  Attractively mounted in a perky box.  $160