An impressive Art Deco ruby and diamond ring, 1920s, set with a cushion-shaped ruby weighing

An impressive Art Deco ruby and diamond ring, 1920s, set with a cushion-shaped ruby weighing 5.66cts, between stepped shoulders set with baguette diamonds, mounted in platinum, size L

Accompanied by report number 136293 dated 20th February 2024 from SSEF stating that the antique cushion step-cut ruby, measuring 12.37 x 8.87 x 5.35mm, is of Burmese (Myanmar) origin, with no indications of heat treatment