ART DECO RING In platinum, set with a rectangular cut emerald weighing 4.01 cts, the stepped shoulder of three baguette-cut diamonds. French work of the 1930s. Droguet & Compagnie hallmark, numbered. A diamond and 18k gold ring set with an octagonal step cut shaped emerald weighing 4.01 cts. Maison Droguet et Compagnie, registered 1932, worked closely with Cartier for forty years. C.G.L. certificate stating: origin Colombia, minor oil. RC : Stone dimensions: 11.42 x 10.23 x 4.68 mm. TDD: 51; US: 6 (changeable). Gross weight: 6.2 g (18k - 750).