Tourmaline is a crystalline boron silicate mineral, which can be compounded with many different elements, resulting in many and varied colours.
Black Tourmaline, otherwise known as Schorl, is a sodium iron aluminum boro-silicate.
Black Tourmaline is one of the most powerful protection stones. It protects the wearer from surrounding negative energy, psychic attack and attack from entities. It also protects one from one’s own negative thoughts and internal conflicts.