18k Yellow Gold Oval Sapphire and Diamond Ring

18k yellow gold and oval blue sapphire ring with 12 round brilliant cut diamonds weighing .72ctw. approximately. The sapphire measures 9x7mm approximately 2.20cts. All stones are prong set with sapphire at center surrounded by diamonds. The ring is presented with a high polished yellow gold shank that pinches towards ring and tapers towards back.. Ring measures 6.75. The sapphire is Thai in origin and heat treated.