This is a large, 6 lb natural dark smoky quartz crystal cluster from the mines in Minas Gerais, Brazil. The entire cluster measures 8.7" wide and comes with a Gibson display stand to assist with presentation. The majority of the crystals are in excellent condition and contain no polished facets.
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.