Black onyx crystals can be used for grounding, protection, and self-control, and as a shield against negative energy. It also enhances discipline, allowing more ease in following through on goals and completing tasks.
Onyx can be a great gem for recovery as it helps you to swerve any shade of relapse and instead encourages your body to physically focus on healing. Onyx can also lend support to the bone marrow and tissue structures in the body, along with helping to strengthen teeth and bones too.