The oval cut black onyx measures 10 x 12mm.
Beautiful oval cut black onyx and diamond men's gemstone ring set in 10k yellow gold. Oval Black Onyx & Diamond Men's Ring Crafted in Solid Yellow Gold, I/J by SuperJeweler. - Lifetime Guarantee - 60 Day Worry-Free Return - Oval Black Onyx & Diamond Men's Ring Crafted in Solid Yellow Gold, I/J by SuperJeweler Available in ring sizes 8-12.