A ruby and sapphire ring, of bombé design, set with a cabochon sapphire and ruby, each within square

A ruby and sapphire ring, of bombé design, set with a cabochon sapphire and ruby, each within square and round brilliant-cut diamond surround in yellow gold, size O, French control marks and maker's lozenge

Accompanied by report number 5783-4320 dated 11th October 23 from GCS stating that the sapphire is of Sri Lankan (Ceylon) origin, with indications of heat treatment, and the ruby is of Burmese (Myanmar) origin, with no indicatons of heat treatment