Men's .30 TCW Emerald-Shaped Genuine Onyx Cubic Zirconia Accent 14k Yellow Gold-Plated Classic 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 Inspired by contemporary fashions, this emerald-cut onyx ring is accented with three round cubic zirconia. Exceptional styling in 14k Gold-Plated. Sizes 8-13.