This 10K yellow gold ring is a vintage piece of men’s jewelry with a black onyx and diamond accent. 03 ct-tw diamond is natural and the setting style is prong. The ring is size 10.5 and can be resized. The metal purity is 10k with a base metal of gold and os 4.1 Pennyweights.. This unisex adults ring is perfect for any occasion and is a great addition to any jewelry collection. Professionally cleaned and polished to a like new condition.