Rich coverings of olive green to yellow green crystallized Duftite are seen forming on ridges of a Calcite crystal matrix, from the famous Tsumeb Mine, Namibia. Later formation of colourless gemmy well formed rhombic crystals of Calcite has mostly covered the Duftite, with a scattering of gemmy blue micro-crystals of Dioptase. An excellent specimen from the Tsumeb.