This beautiful piece of rough Black Tourmaline is wrapped in black wire. Black cotton cord adjusts from 19-21" with a lobster clasp. Item# NG3237 Stone measures 1/2" wide x 1" tall. It is believed that Black Tourmaline is a powerful stone for protection against negative energy of all kinds, as well as being a strong spiritual grounding stone. It is associated with joy, strength, peace & compassion. It surrounds one with a strong protective shield and helps facilitate inner & outer balance. It also deflects negative energies & can be worn when going into negative environments.