Art Deco style diamond, sapphire and emerald navette cluster ring

Art Deco style diamond, sapphire and emerald navette cluster ring in platinum. Centrally set with an estimated 1.00ct round Old European cut diamond in a raised four claw setting, bordered to top with a row of callibre cut sapphires in channel settings, bordered to bottom with a row of callibre cut emeralds in channel settings, to an openwork marquise cluster with curving claws, polished borders and pierced linear gallery, met to either side with slightly trumpeting shoulders which smooth to a solid shank. Marked platinum.