RING IN GOLD, SILVER, CHANGEABLE SAPPHIRE AND DIAMONDS oval-cut sapphire weighing approx. 14.25 cts with Cisgem certificate attesting the colour change from blue to violet, from Sri Lanka, without heat treatment, and old-cut diamonds Weight approx. 15.5 g, circumference of finger 57 A GOLD, SILVER, COLOUR CHANGE SAPPHIRE AND DIAMOND RING