Black tourmaline crystal specimen Black Tourmaline is part of the Tourmaline family. It is also known as Schorl and is a style of silicate crystal. It is commonly found in trigonal crystal systems and is made up of Sodium Iron Aluminum Borate Silicate. The stone is black. Black Tourmaline means grounding and protection. Black tourmaline is hugely powerful stone for those who want to wear a constant cloak of protection. Potent, inky black, and with strong grounding forces, this jet colored stone is known for being a swallower of negative energies. It effectively helps the wearer be absolved of dark feelings, turning these anxious vibrations into a positive spin that nurtures the soul. Origin: Skardu, Pakistan Weight : 66grams Size : 4.5cm x 4cm Thank you for shopping with us.