Lot 628. A Fine 12.00 carats Burmese Sapphire and Diamond Ring, by Bulgari. Estimate: HK$1,900,000.00 - HK$2,500,000.00 (€ 210,000 - 280,000). © Bonhams

The oval-cut sapphire, weighing 12.00 carats, within a double four-claw setting, between shield-shaped diamond shoulders, diamonds approximately 1.80 carats total, signed Bulgari, ring size 5¼.

Accompanied by a SSEF report stating that the sapphire has no indications of thermal treatment and originates from Burma (Myanmar). Report number 92363, dated 29 May 2017.

Accompanied by an AGL (American Gemological Laboratories) report stating that the sapphire has no indications of heat treatment and originates from Burma (Myanmar). Report number CS 1074321, dated 28 April 2016.