Lustrous intergrown crystals of Calcite on a shell of Dolomite (cast) from the Tsumeb Mine, Namibia. Crystals of Calcite measuring to 1cm are a translucent to gemmy creamy yellow-tinted. Formed over a shell of pinkish Dolomite, which had once formed over rhombic crystals of Calcite. A pleasing Calcite specimen from the Tsumeb Mine.