A specimen comprising numerous radiating groups of prismatic quartz crystals, frosted with a coating of another mineral, and resting on a martix of quartz, sphalerite, and pyrite. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.219. 1.25 kg, 14cm (5 1/2"). Property of a Gloucestershire gentleman; inherited from his grandfather. Found Rodopi Mountain region; collected 1930-1990 by the late Marin Savov of Pamporovo, Bulgaria. There are around 80 mines for lead and zinc in the area whose reserves are among the largest in Europe. [No Reserve]