Ring in 750 thousandths white gold, set with a tonneau-cut sapphire weighing approx. 3.50 ct, flanked by seventy-three modern brilliant-cut diamonds. Sapphire size: 10.10 x 6.60 x 4.70 mm Total estimated diamond weight: 0.50 ct Finger: 52 - Gross weight: 3.92 g Sapphire certified by the International Gemological Institute (IGI) as a natural sapphire, Deeps blue, with heating indication.