Here we have a contrastful and also exceeding colourful specimen of Dioptase on Calcite from the world famous Tsumeb Mine of Namibia. Outstanding specimen of lustrous, deep green Dioptase crystals on matrix showing UNUSUALLY good isolation to the crystals for the material. The largest Dioptase is an impressive 1,0 cm, and they are partly gemmy and rich. Associated are mm-size Calcites rhombs . Excellent Dioptase in and of itself, and an equally choice combination piece. Minor but visible imperfection.