PalmBeach Jewelry Oval-Shaped Genuine Onyx Crystal Accent 14k Yellow Gold-Plated Cocktail Ring Top Rated Seller - Trusted Since 1952 - 90 Day Guarantee - Easy Returns - Free PalmBeach Jewelry Gift Box Black Onyx is a variety of the gemstone chalcedony, dramatic in color and rich in history. Ring Style: Cocktail The distinctive design of this ring makes it a must-have. A single onyx stone is highlighted by golden tendrils and a single crystal accent. 14k Gold-Plated. Sizes 5-10.