Protection & Balance
Black onyx, like all black stones, is grounding and protective, bringing about an emotional, physical and intellectual balance. It aids in centering & stabilising physical energy. Onyx is also said to overcome negativity and bitterness of the heart. It heals inner anger, inviting love and the courage to start again making it useful for any kind of emotional trauma.
Cho ku Rei- 
Cho ku Rei is a reiki symbol which  indicates strength, power light and action. 
It represents energy with a direction and purpose. 
Use this crystal with it’s symbol to amplify it’s crystal healing powers or as an assistant to amplify other crystals.