Black Tourmaline purifies and transforms dense energies. Brings protection from negative energies. A grounding stone that cleanses and supports the base/root chakra. Prevents psychic attack. Grounds energy. Promotes clear rational thought and a positive attitude. Defends against disease. Provides relief from pain and helps with arthritis. This Obelisk is approximately 7" tall, 2" wide, and approximately 1.7 pounds. Metaphysical properties are provided for your information and are not meant to replace the advice of a qualified physician or medical practitioner. Due to the nature of this product, color, size, and shape will vary.