Art Deco diamond solitaire ring. Set to centre with a round old cut diamond in an open back claw setting with an approximate weight of 0.85 carats, to an elegant solitaire design, featuring curving claws, a geometrically pierced gallery and open circular backholing, flanked by elegant openwork looped shoulders and tapering down to a solid D-shape shank. Tested white gold with platinum settings, circa 1925.