A 4.50 CARAT BURMA NO HEAT SAPPHIRE AND DIAMOND RING in 18ct yellow gold, the 4.50 carat oval cut sapphire encircled by round and tapering baguette cut diamonds totalling 1.70 carats, full British hallmarks, size O / 7.5, 9.1g. Accompanied by a gemmological report stating the sapphire is of Burmese (Myanmar) origin with no indications of heat treatment.