platinum retro ring with diamond and onyx

A retro platinum square retro, set with a large old cut diamond in the centre, (0.7 karaat G, VS), and sururrounded by another square set with 18 brilliant cut diamonds (18 x 0.06 is app. 1.08 carat, E-F-G, VS.) On the shoulders is a tapered cut onyx with a kite-shaped white gold ornament in the middle, set with an old brilliant cut diamond. On each side of the gallery is curl with a cabochon cut onyx at the heart, circa 1935-1940.

weight: 13.79 grams
size: 17 mm / 6 1/2 US
width: 5.5 – 15 mm