Vintage French fancy yellow sapphire and diamond cluster ring

French vintage 4.10ct cushion fancy yellow sapphire and diamond cluster ring in 18kt yellow gold. Centred with an estimated 4.10ct cushion shape mixed cut fancy yellow sapphire with no indications of heat treatment, in a slightly raised four claw setting, framed by round old cut diamonds and set at the corners and to the shoulders with rectangular baguette cut diamonds in channel settings, to an impressive fancy cluster design with curving claws, polished edges, pierced linear gallery and met to either side with trumpeting split open shoulders which terminate to a solid shank. Hallmarked 18kt gold, French import mark. Accompanied by Gemmological Certification Services certificate.