18K金镶嵌6.03克拉椭圆形切割蓝宝石,配镶圆形切割钻石,指环尺寸6 1/2 Accompanied by report no. GRS2018-118069 dated 2 November 2018 from GRS stating that the 6.03 carat sapphire is of Burma (Myanmar) origin, vivid to deep blue, GRS typle “Royal Blue”, with no indication of thermal treatment