Buy Smokey Quartz Carved Points online from Natural Agate. 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. Smokey Quartz disperses fear, lifts depression and negativity. It brings emotional calmness, relieving stress and anxiety.