PalmBeach Jewelry Marquise-Shaped Genuine Onyx 14k Yellow Gold-Plated Classic Ring FREE SHIPPING on orders of $30.00 or more - 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 The sleek, clean look of onyx is made even more beautiful in this golden ring. A marquise-shaped onyx stone is set in a swirl of 14k Gold-Plated. Sizes 5-10.