Size:200.0 Grams | Color Name:Black Tourmaline Black Tourmaline Carries a strong energy for protection against negativity & electragnetic energy. it helps to clear cleanse and unlock any energy blockages within your body or he.it helps to put an energetic boundary between you and others so that you don't pick up unwanted energies. When placed in the corners of the roit sein the rowith a protective shield.