A sapphire and diamond ring

The oval-cut sapphire in a four-claw mount, between two lines of brilliant-cut diamonds, to an openwork shank, diamonds approx. 0.30 carat total, ring size L

Accompanied by a report from GIA stating that the sapphire is natural, of Sri Lankan origin, with no indications of heating. Report number 6351951288, dated 11th September 2020.