This is an authentic ROBERTO COIN 18K Rose Gold Diamond Mother of Pearl Doublet Oval Cocktail Ring size 53 or 6.25. The ring is crafted of 18 karat rose gold and features a doublet of mother of pearl and rock crystal framed by a halo of diamonds, approximately .32 total carat weight, along with a synthetic ruby on the inside of the band. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.