7" Wide, Free-Standing Smoky Quartz Cluster - Brazil

This is a 7" wide, smoky quartz crystal cluster from Minas Gerais, Brazil. The crystals are in great condition and the specimen has a flat base, allowing for gorgeous, freestanding presentation. Some of the terminations have undergone some polishing.

Smoky quartz is a grey-brown to black variety of quartz. This common name is derived 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.

Silicon Dioxide, also known as SiO2 or Quartz, is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich, hot watery solutions called hydrothermal environments, at temperatures between 100°C and 450°C, and usually under very high pressure. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountains forming, and can be hundreds of millions of years old.
Quartz var. Smoky
Minas Gerais, Brazil
7 x 4.1"