Black Tourmaline Usui Reiki Healing Generator has a Black Tourmaline pyramid in the center and 4 Black Tourmaline pointed cap sticks that extend outward. It is between 3.5-4 Inches in size. It is powerful grounding stone, electrical in nature, providing a connection between Earth and the human spirit. Its supportive energy aligns the energy centers of the body and channels healing light throughout the system. Order online now.