A consummate classic specimen of Dioptase on Calcite from the classic location for the Mineral at the Tsumeb Mine, Namibia. The well formed crystals of Dioptase measuring to 0.9cm are pleasingly positioned on the contrasting translucent white druse of Calcite crystals. A lovely emerald green colour is seen to the lustrous Dioptase crystals, with sparkling flashes of neon green from the depth of the crystals. A fine specimen from the Tsumeb Mine.