Tourmalated quartz crystal necklace pendant on black cord

Tourmalated quartz crystal necklace pendant on black cord with adjustable 18-20 inches. Tourmalated quartz is a type of quartz crystal that contains needle-like inclusions of tourmaline. Tourmaline is a boron silicate mineral. Tourmalated quartz has black lines because it's a clear quartz crystal that grew with black tourmaline. The black tourmaline inclusions look like needles and are sometimes called "schorl" Similar stones Rutilated quartz: Similar in appearance to tourmalated quartz, but rutile inclusions are usually golden or reddish