Greenish-blue sapphire and diamond ring, centring a brilliant-cut greenish-blue sapphire weighing 5.20 carats, claw-set to an openwork spherical surround pave-set with brilliant-cut diamonds, the shoulders similarly decorated, the small diamonds together weighing approximately 1.00 carat, mounted in platinum, size L1/2. Accompanied by a GIA report numbered 2225130689, dated 10 November 2021, stating that the 5.20 carat greenish-blue sapphire is natural, with no indications of heating.