Tourmalines' properties vary according to its colour. Black: protective, shielding against unwanted energies, and prevents others draining ones energy. Green: transforms negative energy to positive, attracts abundance and success. Pink: treats emotional pain, loss and fear. Watermelon: powerful effect on the heart chakra, aids in understanding of situations, treats emotional dysfunction. Physical properties also relate to the colour. Black: arthritis ; Green: weight loss, chronic fatigue, asthma; Pink: heart, lungs and skin; Watermelon: heart and lungs. Chakras: Black: root, Green: heart, Pink : heart, Watermelon: heart.