Luxurious Black Onyx and Diamond Rings! This 14K Gold Men's Ring weighs approximately 9 grams and showcases a beautiful black onyx and a prong-set, 0.10-carat round diamond in the center. Featuring a highly polished and textured gold finish, this men's black onyx and diamond ring is available in your choice of 14K white, yellow and rose gold, and makes a perfect gift for any occasion.