Black Tourmaline crystal is a powerful stone for protection against negative energy of all kinds including psychic protection and EMF protection. It is also a strong spiritual grounding stone. Also known as Schorl, it encourages optimistic attitudes as well as good luck and happiness, regardless of the circumstances that you find yourself in. Check an exclusive range for Black Tourmaline Small Pyramid from Natural Agate. Pyramids are known for their powerful healing property of preservation.