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Art Deco sapphire and diamond cluster ring. Set centrally with a cushion shape old cut natural unenhanced Ceylon sapphire in an open back rubover setting with an approximate weight of 2.40 carats, further enhanced by fourteen round old cut diamonds in open back grain settings with an approximate combined weight of 0.50 carats, to an elegant bombé form featuring millegrain borders, a finely pierced scrolling gallery and fancy open backholing, leading to carved openwork shoulders and flowing through to a solid D-shape shank. Tested platinum, circa 1920, accompanied by Gemmological Certification Services report #79222-98.