A fascinating specimen of Cuprite crystals on Mottramite from the Tsumeb Mine, Namibia. Crystals of sparkling maroon red Cuprite are seen showing repeat twining across a green carpet of Mottramite. Both minerals occupying an open cavity in a Cuprite/Calcite/Dolomite matrix. Some Cuprite crystals display flashes of red from within them. A neat specimen from the Tsumeb mine.