Onyx Gemstone – Meaning and Benefits Posted on 03/09/201821/07/2026 0 Black Onyx gemstone, a protective banded chalcedony worn for confidence, protection and mastery over one’s destiny.Leave a Reply Cancel replyYour email address will not be published.** Save my name, email, and website in this browser for the next time I comment. Post navigation <span class="meta-nav">Published In</span>The Secret to the Onyx Gemstone: Meaning, Benefits and Uses