Roberto Coin ring from the Petals Collection. Polished 18-karat rose gold band and settings. Mother-of-pearl, diamond pavé and turquoise. Brilliant-cut round VS-G white diamonds. 5. 10 total mother-of-pearl carat weight. 1. 00 total turquoise carat weight. 0. 13 total diamond carat weight. Signature hidden synthetic ruby. Made in Italy.