5.4" Dark Smoky Quartz Crystal Cluster - Brazil
This is a beautiful cluster of dark smoky quartz crystals from Minas Gerais, Brazil. The color is natural and the crystals have not been heated or treated. A facet on one of the crystals has been polished.
Smoky quartz is a grey-brown to black variety of quartz. This common name is derived from from the appearance of smoke within the quartz crystal. Dependent on the location and the chemicals present during formation, smoky quartz can appear opaque black, however it’s typically translucent to some extent. It’s believed that the quartz gains this color from a combination of natural irradiation and aluminum impurities.