Platinum ring set with a cushion-shaped mixed-cut sapphire, the openwork shoulder adorned with antique cut diamonds. French work from the first quarter of the 20th century. Finger circumference: 53. Gross weight: 6.7 g Sapphire accompanied by a GEM Paris report (2020) attesting: Sri Lankan origin, no modification or treatment observed (dimensions: approximately 11.7 x 8.4 x 7.1 mm)