Platinum, sapphire and diamond 'Trombino' ring, Bulgari, of bombe design, centring on an antique cushion-shaped blue sapphire of medium strong saturation weighing approximately 10.00 carats claw-set within a surround of brilliant-cut and tapered baguette diamonds, together weighing approximately 2.80 carats, size M, signed Bulgari., accompanied by Ssef report numbered 90742, dated 8 March 2017, stating that the sapphire is approximately 10 carats, of Ceylon (Sri Lankan) origin, with no evidence of heat treatment., Literature: Amanda Triossi, Between Eternity and History, Bulgari, from 1884 to 2009, 125 Years of Italian jewels, Skira, Milan, 2009, pp. 254-255, 295 (illustrated, another example).