Art Deco aquamarine and diamond ring. Set to centre with an octagonal emerald-cut natural aquamarine in an open back claw setting with an approximate weight of 6.55 carats, flanked by four rectangular baguette cut diamonds in open back rubover settings with a combined approximate weight of 0.30 carats, to a geometric flanked solitaire design featuring stylised claws, a structural open gallery and fancy open backholing, leading to raised shoulders with chenier detail and flowing through to a solid square shank. Marked platinum, circa 1930.