Monture Boucheron, a sapphire and diamond ring

Monture Boucheron, a sapphire and diamond ring, claw-set with an octagonal step-cut sapphire weighing 4.83 carats, to an 18ct yellow gold mount channel-set with square and tapered baguette-cut diamonds, size H1/2 (sizing beads), signed MT Boucheron, numbered P53174, French assay mark for 18ct gold, French maker's mark for Boucheron.

Accompanied by GEM PARIS report no. 20221976477 dated 22nd May 2022, stating the sapphire is of Ceylon (Sri Lankan) origin, with no indications of heat treatment.

Accompanied by original illustration from Boucheron dated 1992