Black Tourmaline is a protective stone which repels and blocks negative energies and psychic attack. 

Black tourmaline helps cleanse any negative energy from your personal space. It′s extremely relaxing to the body, allowing your muscles to loosen and your body to relax. 

While these crystals are extremely useful for helping promote a good night′s sleep, it is also important to remember that some crystals may disturb sleep and should never be kept in the same place you lay your head to rest.