Roberto Coin ring from the Petals Collection. Polished 18-karat rose gold band and settings. Turquoise, diamond pavé and mother-of-pearl. Brilliant-cut round VS-G white diamonds. 5. 10 total mother-of-pearl carat weight. 5. 35 total turquoise carat weight. 0. 20 total diamond carat weight. Signature hidden synthetic ruby. Made in Italy.