Tiffany & Co. Art Deco diamond solitaire ring. Set with a round old cut diamond in an open back grain setting with an approximate weight of 0.40 carats, to a geometric solitaire design featuring a square collet, an intricately pierced gallery with an openwork heart motif and open backholing, flanked by slightly raised trumpeting shoulders engraved with a stylised foliate pattern and flowing through to a solid tapering D-shape shank. Tested platinum, signed 'TIFFANY & CO', engraved 'Apr 1925', American, circa 1925.
