Edwardian style octagonal blue sapphire and diamond cluster ring mounted in platinum, the 3.62 carat step cut Ceylon sapphire measuring 8.33 by 8.26 mm and accompanied by a GIA report stating 'no indications of heating', surrounded by a diamond set octagonal cluster with mille grain decoration, each shoulder decorated with four brilliant cut diamonds, the 28 brilliant cut diamonds with a total weight of 0.39 carat.