Black Tourmaline crystals are incredible for cleansing the physical and auric fields. They can help rid you of negative thoughts, anxieties, anger, and ideas of unworthiness. It is a powerful stone for anyone going through challenging times. It has the ability to transmute and purify negative energy, turning it into positive energy. It is a highly protective stone for those with psychic and empathic abilities. Black Tourmaline is wonderful for helping to ground you to the earth.