Boucheron 5.15 AGL No Heat Burma Sapphire Gold Ring

1960's Boucheron Paris sapphire ring set with a oval sapphire weighing 5.15 carats. The sapphire is certified by AGL as origin- Burma, not heated. It is set in a highly stylized fluted gold ring. Signed Boucheron Paris, with French hallmarks. Size 4 1/2.