Smoky Quartz Freeform. Smoky quartz is a yellowish-brown-black color-variety of crystalline quartz. Smoky quartz is mainly found in quartz veins and pegmatite dikes that cut across igneous and metamorphic rocks. Smoky Quartz is mostly found in Brazil, Madagascar, Scotland, USA, Russia, Switzerland and Ukraine. Smokey Quartz is known as the grounding stone. It has the power to help you transmute lower energies to higher energies. It's the grandfather of the Quartz family. It said to help with depression , and stress. Size: ~ 1.25-3 inches *Picture may vary from piece to piece.*