A BURMA NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING

in silver on 18ct gold, set with an oval sapphire c. 3.70 carats surrounded by a cluster of old cut diamonds totalling c. 0.70 carats, no assay marks, size P 1/2, c.3.7 grams gross, verbal assessment from GCS stating sapphire is of Burmese origin with no indications of treatment