For just $11.99 This listing is for one Black Tourmaline Crystals Medium : 4.5 - 9oz Feel secure under Black Tourmaline’s protection, even the worst negative energy will have no affect on your mood. Black Tourmaline is one of the most powerful crystals for protection and elimination of negative energy. Black Tourmaline shields you from any unwanted energies, creating an energetic barrier between you and others. On a larger scale you can use Black Tourmaline to protect your home and other places. Place Black Tourmaline in each corner of a room to seal your places of rest from negative energies.