Super Black Smokey Quartz Cluster - Brazil Comes with a wood carved base for display With base +/-: 11x9x9cm - 544gram Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal. Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon formed from the silicon dioxide by natural irradiation. This Xclusive Item will be shipped very well packed. Furthermore, fragile tape will be placed on the package and a track code to track your package is available after sending out.