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. Black Tourmaline is a protective stone which repels and blocks negative energies and psychic attack. Black Tourmaline also aids in the removal of negative energies within a person or a space. Black Tourmaline will cleanse, purify, and transform dense energy into a lighter vibration.