Smoky Quartz Necklace with Sterling Silver Clasp Tourmaline is a boron silicate

Tourmaline is a boron silicate mineral that is formed with elements such as aluminum

Weight: 3

This is because it is rarely transparent and does not compare well with other high-quality gems

This tree grows naturally in Central American climates

The most highly prized specimens are excavated from the Bearpaw Formation in Alberta

Smoky Quartz Necklace with Sterling Silver Clasp Tourmaline is a boron silicateWeight: 0. 65 oz Length: 18 19 in. Specifics: Beaded with Lobster Clasp Smoky Quartz is a brown gray yellow variety of quartz that contains aluminum impurities that are naturally irradiated by the Earth. This is the same process that occurs to form amethyst, but with a different metal. Its name is derived from the German word "quarz" meaning hard. Quartz can form in trigonal or hexagonal crystal systems depending on the temperature during formation.