Woman's Australian Opal Ring with Sparkling White Sapphire in 14k GoldAustralian opal engagement ring with a sparkling white sapphire set in 14k yellow gold by Mark Hileman. The ring is inlaid with 3 pieces of genuine Australian opal on each side of the white sapphire. The channel set white sapphire weighs 1. 25 carats and is very high quality. The ring measures about 7. 2 mm wide at the top and tapers down to about 3. 7 mm at the bottom. This unique opal ring is hand signed "MMH" on the inside by Mark McBride Hileman