ART DECO RING IN PLATINUM, EMERALD AND DIAMONDS, CIRCA 1940'S Art deco platinum ring set with trapezoid-cut diamonds weighing approx. 0.40 ct, two brilliant-cut diamonds weighing approx. 0.60 ct and a square emerald weighing approx. 1.70 ct. Emerald: probably Colombian, inclusions Marked with a dog's head in platinum size: 52.5 gross weight: 5.94 gr. ART DECO PLATINUM, EMERALD AND DIAMOND RING, CIRCA 1940'S Art Deco platinum ring set with trapezoid cut diamonds weighing approximately 0.40 ct., two brilliant cut diamonds weighing approximately 0.60 ct. and square emerald weighing approximately 1,70 ct.emerald: probably from Colombia, inclusions Hallmark: platinum mark 'dog's head' size: 52.5 gross weight: 5.94 gr.