Bidspirit auction | Opal and Diamond Platinum Cocktail

Opal and Diamond Platinum Cocktail Ring - Vintage-style cocktail ring featuring a central oval cabochon-cut opal and diamond accents set in platinum. The opal exhibits a green and blue play-of-color and is secured by four double-prongs, while the shoulders are set with ten round brilliant-cut diamonds. The ornate mounting includes an openwork filigree gallery and is incised with 259, Pt900, and 018 on the interior shank. Ring size: US 5.5. Opal weight: 2.59 carats. Total diamond weight: 0.18 carats.  6.4 grams