Get highly polished Smokey Cabochons at low prices. Smoky Quartz is a translucent smoky brown or gray variety of Quartz. It ranges from almost completely transparent to an almost opaque brownish-gray crystal. The color of Smoky Quartz is due to natural irradiation and traces of aluminum within the crystal lattice of the stone. These are medium height domed cabochons with a flat back. Shade will vary from that illustrated as these are all natural stone with intrinsic variation. The illustration may be taken as a guide. Order online now.