Platinum and diamond 'Lucida' ring, Tiffany & Co., 2002 Claw-set with a Lucida-cut diamond weighing 0.77 carats, size L, signed Tiffany & Co., T & Co., UK hallmarks, numbered 17620495. Accompanied by facsimile Tiffany & Co. certificate stating that the 0.77 carat diamond is F colour, VS1 clarity