Vintage Piaget Blue Sapphire & Diamond 18k White Gold Ring. Stunning white gold PIAGET ring set with a beautiful oval cut sapphire with a fine vivid blue colour, very good cut and good clarity. Some small inclusions in the stone but still a fine piece. Also has one small diamond set into the side of the ring. Fine jewellery houses like PIAGET only use the finest of gemstones in their jewellery. The ring is signed PIAGET, 750 and with Swiss hallmark. Ring size UK L - EU 52 - US 5.5 - Resizing is