An Art Nouveau diamond and pearl crossover ring

An Art Nouveau diamond and pearl crossover ring, of open-work swirl design and set with an old circular-cut diamond and a pearl, smaller graduated shoulder diamonds and fluted shank, size R

Accompanied by report number 77117-29 dated 21st August 2017 from GCS, London stating that the white pearl measures approximately 6.3-6.4 x 5.6mm and is a natural saltwater pearl with no indications of treatment