Diamond ring, Tiffany & Co, the round brilliant cut diamond weighing 0. 72 carats between shoulders channel set with round brilliant cut diamonds, mounted in 18ct white gold, signed Tiffany & Co. Numbered D22879, size K. Accompanied by a Tiffany & Co. Certificate numbered D22879 stating that the 0. 72 carat diamond is F colour, VS1 clarity, together with a Tiffany & Co.