This is an authentic ROBERTO COIN 18K Rose Gold Diamond Sapphire Mother of Pearl Verona Rainbow Disc Ring 53 6.5. The ring is crafted of 18 karat rose gold and features a mother of pearl inlay framed with rainbow sapphire, tsavorite and one synthetic ruby as the designer's signature. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.