COLOUR CHANGE SAPPHIRE AND DIAMOND RING Of cluster design, centring a claw-set oval colour-change sapphire weighing 19.86 carats, framed by a halo of brilliant-cut diamonds, to similarly set shoulders, the 50 small diamonds together weighing approximately 0.77 carats, mounted in platinum, size M1/2. Accompanied by a GRS report numbered GRS2021-100623, dated 8 October 2021, stating that the 19.86 carat colour-change sapphire is natural, with no indications of heating, of Sri Lanka origin.