MARQUISE RING in platinum (850 parts per thousand), set with a beautifully colored square cushion-cut ruby in a claw setting, flanked by two old-cut diamonds and rows of 8/8 old-cut diamonds. Ring band made of platinum wires. French craftsmanship, circa 1950. Ruby weight: approx. 1.20 carats (with surface scratches). The piece comes with a GEM Paris certificate No. 20261978846 dated June 11, 2026, certifying that the ruby originates from Myanmar (formerly Burma), with no observed modifications or heat treatments, and a slight presence of colorless oil. Gross weight: 10.30 g. - Ring size: 55.