Guardian of Energy: The Shielding Magic of Black Tourmaline Black tourmaline, also known as Schorl, is a member of the tourmaline family. It falls within the silicate crystal group and is frequently found in trigonal crystal systems. Made up of Sodium Iron Aluminum Borate Silicate, this strikingly black stone represents protection and grounding. As a grounding stone, Black Tourmaline Jewelry is believed to create a conduit between the human spirit and the Earth, allowing bad energies to be released from people or areas.