Art Deco Ring with Synthetic Sapphire and Diamonds

Platinum engagement ring (hallmark: dog and mascaron), the center of which is adorned with a diamond-cut synthetic sapphire, in a surround of 8x8 cut diamonds. Total weight of diamonds estimated at approximately 0.35Ct French work, Art Deco, circa 1920. Gross weight: 4.25g Pattern height: 1.70 cm Pattern width: 1.30 cm Finger size: 50 1/2 (diameter 16.00 / US 5.50). Condition: slight micro scratches on the platinum parts, and slight abrasion of the stones, see photos. Did you know that humans have been able to make synthetic sapphires in the laboratory since the beginning of the 20th century? It was the French chemist Auguste Verneuil who developed the first process in 1902. These are chemically and physically identical to a natural sapphire. All our engagement rings.