Black onyx tumbled stones are most often used for protection, grounding, and absorbing negativity. Ideal for root chakra work, they enhance focus, emotional stability, and self-discipline. Used in rituals to banish grief, improve concentration, and cultivate strength. Carry as a shield against negative energies and psychic attack. Meditate with black onyx to ground and balance strong emotions. Use in a crystal grid or keep on a work surface to increase endurance, self-control, and facing challenges.