RING Twisted platinum and white gold, set with a large button pearl in a radiant setting of baguette and round diamonds. Circa 1950. TDD: 50; US: 5 1/2 (not subject to change). A diamond, platinum and 18k gold ring set with a natural pearl. Circa 1950. L.F.G certificate attesting: perle fine d'eau de mer (natural pearl - saltwater). RC : Dimensions of the pearl: 13.7 - 14.1 x 12.1 mm approx. Gross weight: 18.2 g (Pt - 950 and 18k - 750).