18ct white gold, sapphire and diamond ring, the octagonal step-cut vivid blue sapphire weighing 5.12 carats, is claw-set between trapezoid diamond shoulders together weighing approximately 1.46 carats, the undercarriage embellished with two collet-set princess-cut diamonds, size L. Accompanied by a Grs certificate numbered GRS2017-09293, dated 25 September 2017, stating that the 5.12 carat sapphire is natural, has no indication of thermal (heat) treatment, and is of Madagascan origin.