This Specimen has been sold.
2.5" Natural, Dark Smoky Quartz Crystal - Colorado
This is a lustrous, dark smoky quartz crystal. The color is natural and hasn't been enhance by heat treatment. It was mined from a private claim near Lake George in Teller County, Colorado.
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.