PalmBeach Jewelry Men's Genuine Onyx 14k Yellow Gold-Plated Ribbed 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: Classic For the man who likes to show off his sense of style. Smoldering onyx sits in an intricately carved band. 14k Gold-Plated. Sizes 8-13.