Black Tourmaline element is Earth. I feel you can use this crystal on all Chakras. Helps to eliminate or remove lower energies. It is awesome for psychic protection or for anyone who has a challenging job or is surrounded by lower energy. Helps to balance the energy fields of the holder. Helps to remove toxic energy that can be present around you or within yourself. black tourmaline also helps to keep you grounded. This crystal used correctly can help remove anxiety self-judgment unworthiness. Also, the removal of negative thoughts and patterns.