Obsidian Wisdom: Unveiling The Deep Meaning of Black Onyx Black onyx reflects solid healing properties, particularly those responsible for protection and shielding against any kind of harm. Wearing Black Onyx jewelry can help build strength and willpower. Black onyx converts negative energies into positive energies. Its vibrant energy is so powerful that it provides mental clarity, high concentration, and reduces pressure. This gemstone is also responsible for activating certain chakras and unblocking chakras.