This is definitely a great combination piece from famous Cavnic Mine of Maramureș in Romania. And here we have suberbly formed, tetrahedral Tetrahedrite crystals accompanied by black, iron-bearing and multifaced Sphalerite and brown spherical sprays of Calcite. The Tetrahedrite here has superb metallic sheen, is sharp edged and excellently terminated. This is a KILLER PIECE all the way from the heyday of this great locale and was mined in 1968. Ex Christof Foltin collection. NOTE: The Calcite varietal on this specimen was for a long time offered as Wavellite, especially from the locals.