Sapphire and diamond cluster ring. Set to centre with a oval old cut natural, unenhanced sapphire in a open back rubover setting with an approximate weight of 2.05 carats, surrounded by thirty-two round eight cut diamonds in open back grain settings with a combined approximate weight of 0.48 carats, to an elegant cluster design featuring millegrain borders, a decoratively pierced gallery and fancy openwork backholing, leading to raised shoulders with ridged detail and flowing through to a solid D-shaped shank. Marked platinum, French, circa 1920.
