A colour-change sapphire and diamond cluster ring The oval-cut colour-change sapphire, weighing 10.60 carats, claw-set within a brilliant-cut diamond surround and undulating tapered baguette-cut diamond frame, to a wirework hoop, French assay marks Accompanied by a report from Gem Paris, stating that the blue to violet colour-change sapphire is natural with no indications of modification or treatment, origin Sri Lanka. Report no. 20131970792-1, dated 7th March 2013. (Ring size: P (sizing band))