Shop Black Tourmaline crystals, rough pieces, tumbles, bracelets, pendulums and jewellery. Also known as Schorl, Black Tourmaline commonly forms in deeply striated crystals and is one of the best-known dark minerals in modern crystal practice. Traditionally associated with grounding, protection and strong boundaries, it is often kept near entrances, carried as a pocket stone or worn as everyday jewellery. Natural shape and texture vary between pieces.