Sharp, lustrous green dioptase crystals on contrasting white calcite from Tsumeb. The dioptase crystals are glassy and intense. In excellent condition – there are a few incomplete crystals (including a crystal at top left is incomplete at the back) and the base of the specimen is cut with a saw to sit perfectly. Looks great the way the dioptase crystals are perched up at the top of the piece. From the Pete Richards collection (#533), a beautiful dioptase with super contrast.