Onyx
ONYX - (usually black) retains physical body strength.  Receives and holds vibrations both good and bad. May provoke disharmony- use when you need to end an unpleasant relationship. Very physical, low frequency vibration. Stabilizes and strengthens. Quells fear of unknown. Helps control passion and emotions as well as protection from negative thinking. Works through rook chakra. On the Moh's scale Onyx is a 7.0

ONYX Harmony Spirituality Hearing, Ulcers, Heart Intensifying devotion and contemplation, it was used in rosaries. A ‘get away from it all’ stone which allows peace of mind and pleasant reflection. It associates with music, benefiting both composers and listeners.