A very interesting and uncommon combination specimen from the Tsumeb Mine. Green, malachite-coated tennantite crystals to 1.0 cm are scattered on the very 3-dimensional, mounded matrix of essentially solid, bladed to acicular quartz crystals. Quartz is relatively rare at Tsumeb and these are sharp, well-developed crystals. A bonus on the back/bottom is an isolated 5 mm wulfenite crystal. Ex. Rob Smith Collection.