Some pyrite crystals are disposed on a matrix of hyaline quartz crystals. The brilliance is exceptional and they show remarkable crystallographic complexity. Thus, we can distinguish faces of the octahedron truncated by faces of the pentagonodecahedron, with striations, among others. We leave to the buyer of this specimen the entertaining and interesting task of identifying the maximum number of faces. The main Crystal is: 0,6 x 0,6 x 0,5 inc.