5.5" tall with metal stand, quartz is 4"
Smoky quartz is a gray, 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 color results from free silicon formed from the silicon dioxide by natural irradiation. Wikipedia
Crystal system: Hexagonal crystal system
Mineral class: Quartz