An 18ct white gold natural sapphire and diamond ring the centre cushion cut certified natural unheat-treated Burmese sapphire weighing 1.92cts is set between diamond set shoulders with a diamond set gallery, total diamond weight 0.50ct. Accompanied by Gemresearch Swisslab report No. GRS2008-090146T stating the 1.92ct sapphire is of Burmese origin with no indication of thermal treatment