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Diamond cluster ring with calibré sapphire border. Set with fifteen cushion shape old cut diamonds of varying sizes in open back grain settings with an approximate combined weight of 3.00 carats to a millegrain border, encircled by a single row of thirty six channel set tapered baguette cut sapphires in open back rubover millegrain settings with an approximate combined weight of 2.00 carats, to an ornate scrolling openwork gallery with curved backholing to a solid flat shank. Tested platinum, circa 1910.