Dims: 1.5x1.0x1.1" (3.9x2.6x2.9 cm)
Wt: 0.7 oz. (21.1g)
Rodgerberg Mine, Guichab, Nr. Grootfontein, Namibia
This specimen has numerous crystals of dioptase, including one very nice cluster of prismatic crystals, and a band of broken crystals forming a bright green crust that extends from the front around to the back and top. The crust is the normal extreme green color of dioptase, and some of these small crystals are undamaged and transparent. The cluster has several perfectly shaped (but small) crystals, some of which appear transparent, but most are cloudy due to internal fractures and a brown coating (limonite?) on some of the crystals. There is also some calcite present, most of which was dissolved by acid to expose the dioptase.