A very colorful combination piece featuring super-lustrous Dioptase crystals on Calcite. The color saturation, as well as the gemminess, of the Dioptases is terrific, and far better than the pics can adequately portray. There are even several balls of primary Malachite that add greatly to the aesthetics, as well as the mineral interest. And of course, the carbonates below fluoresce. Classic Tsumeb!