Dioptase Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa. Ex. Thomas G. Fowler collection. These fine crystals are one of the most recognizable and desired crystalline minerals on the planet and are always in high demand no matter where they were found. The Tsumeb material remains the most popular, and frankly I believe, the most aesthetic dioptase from any location in the world. We have available a limited quantity of these uncommon specimens in all sizes due to the recent acquisition of the Thomas G. Fowler collection which was rich in this material.  
The large specimen described here exhibits sharply formed, doubly and singly-terminated crystals to 1.5 cm each on a matrix of SMITHSONITE, not calcite. One very tiny missing crystal makes the piece in very good condition overall. It measures 11 x 8.5 x 7.2 cm. A fine, large, high luster, aesthetic mineral specimen. The specimen comes with a custom engraved acrylic base.  $1,500