Black Tourmaline crystal is a big-time energy purifier out of all the healing crystals. It almost acts like an evil eye. Think of it like a bodyguard that provides protection.
It is one of the most powerful minerals for absorbing electromagnetic radiation, which makes it excellent for placing near computers and other electronics.
Having it as a keychain allows you to have protection throughout the day.
Black tourmaline is an excellent grounding crystal for meditation and healing. Soothes panic attacks and control our fears. It can also soothe motion sickness when travelling.