Crystal Properties: Tourmaline is a complex aluminum borosilicate. Its crystal pattern is hexagonal (trigonal) with prismatic crystals and striations running parallel to the main axis. No other gemstone has such wide variations in colors. Tourmalines can be red, pink, yellow, brown, black and various shades of green, blue lilac and violet.
Metaphysical Properties: Tourmaline is one of the most significant mineral groups for metaphysical use, and it includes a wide variety of different forms, colors and energy spectrums.