Victorian Burmese no heat ruby and diamond navette cluster ring

Victorian Burmese no heat ruby and diamond navette cluster ring in 18kt yellow gold. Set vertically with three cushion shape mixed cut Burmese rubies, with no indication of heat treatment, in claw settings, framed by twelve cushion shape Old Mine cut diamonds in claw settings, to an impressive marquise design with intricate settings, curving claws and pierced gallery, the decorative trumpeting shoulders feature a tri-split fleur-de-lis form before terminating and smoothing to a solid shank. Estimated total diamond weight 1.80cts. Accompanied by Gemmological Certification Services certificate.