Tourmaline Crystal System is Hexagonal ~ The hexagonal system is a crystal system of Atoms which the unit cell is a right prism on a lozenge-shaped base. A combination of three of these unit cells forms a hexagonal prism.
Schorl is best known as "Black Tourmaline". Chemical content is sodium iron aluminum boro-silicate.
Schorl is the most common form of Tourmaline and is one of the most aesthetic black minerals known. Although other forms of Tourmaline may be black, Schorl is exclusively black and, unlike other Tourmaline forms, is never transparent or even translucent.
Black Tourmaline is strongly Pyroelectric, meaning that it has the capacity to generate an electrical charge during a temperature change. This is why it is the most widely used crystal for protection against EMF and for warding away negative energy entities.
