El Coriellu mine, S. Cosme de Llerandi, Parres, Asturias, Spain
Superb combo specimen of very rare Cuproromeite growing on twinned Tetrahedrite crystals with alteration by green Malachite from El Coriellu mine, Spain. Cuproromeite, originally named Partzite, replaces partially the Tetrahedrite crystals. It has olive–green color. The main Tetrahedrite crystal is 11mm with sharp shape. One smaller crystals show penetration twinning. Green Malachite alternates the faces of the Tetrahedrite. In very good condition - some natural imperfections. On acrylic base., Excellent!