Black Tourmaline Small
"Secure under the dome of Black Tourmaline’s protection, not even the worst energy downer can burst your bubble. Black Tourmaline is one of the most powerful crystals for protection and elimination of negative energy. It helps to put an energetic boundary between you and others so you don’t pick up unwanted energies. When placed in the four corners of a room, Black Tourmaline seals the room with a protective shield that dispells low vibrational energy."