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Marquise diamond cluster ring. Set with twenty five round old cut diamonds to a marquise floraform cluster and further set to the shoulders, all in open back rubover millegrain and grain settings with an approximate combined weight of 3.00 carats, supported by an openwork gallery with further ornate piercing to the shoulders and intricate backholing, tapering at the trumpeted shoulders down to a solid D-shape shank. Tested platinum, circa 1910.