Alternate Names: Schorl Chakra: Base Chakra Zodiac: Capricorn Planets: Saturn Elements: Earth Typical Colours: Black Black Tourmaline crystal is a powerful stone for protection against negative energies, evil eye, psychic attacks as well as being a strong spiritual grounding stone. Black Tourmaline is a premier stone of protection, a psychic shield deflecting and dispelling negative energies, entities or distractive forces.