Tourmaline is the most colorful of all gemstones. It occurs in all colors, but pink, red, green, blue and multicolored are its most well-known gem colors. Scientifically, tourmaline is not a single mineral, but a group of minerals related in their physical and chemical properties. Schorl, known as "Black Tourmaline" makes a dark, opaque, yet shiny black gemstone. Dravite is almost always brownish in color, and usually opaque. However, transparent forms do occasionally occur, and these can be used as rare brown gemstones. Dark brown Dravite may be heat-treated to lighten its dark color.
Today this stone is still revered as a premier talisman of protection, a psychic shield deflecting and dispelling negative energies, entities, or destructive forces. It guards against radiation and environmental pollutants, and is highly useful in purifying and neutralizing one’s own negative thoughts and internal conflicts, and turning them into positive, usable energy. Black Tourmaline is also a powerful grounding stone, electrical in nature, providing a connection between Earth and the human spirit.