Tiffany & Co. Marquise Diamond Ring, a solitaire diamond set in platinum marked "PT 950" and Tiffany & Co". The diamond weighs 4.01 carats, measures 16.54 x 8.29 x 4.81 mm, VS1 clarity grade, color grade "H", ultra-florescence-none. This ring lot includes original Tiffany & Co. Diamond Certificate #S0015, official Tiffany & Co. customer service report dated and signed by J. Thomas Carrol V.P. of customer service with corresponding letterhead, original ring box, blue exterior box and blue felt back, all with Tiffany & Co. logo.