1950-1959 Aquamarine Tiffany & Co. Cluster Rings. From our unique collection of Rings, this Tiffany & Co. piece is offered for sale online by Berganza. Global shipping is available. Aquamarine and diamond cluster ring by Tiffany & Co. Set with a natural unenhanced rectangular emerald-cut aquamarine to centre in an open back millegrain setting with an approximate weight of 9.00 carats, encircled by a single row of twenty round old cut diamonds in open back grain and claw settings with an approximate combined weight of 1.40 carats, with curving pierced claws, an openwork gallery and intricate backholing, flanked by trumpeted split tri-part shoulders with ridge detail, tapering down to a lightly fluted flat shank. Marked platinum, signed 'TIFFANY & CO', American, circa 1950.