1920s Platinum Diamond and sapphire Ring. Circa 1920s Platinum Ring, centrally set with a .95 carat European cut Diamond and surrounded by another 1.10 carat of European cut Diamonds and Caliber cut Sapphires. The Diamonds are very clean and face up fairly white. The ring is further enhanced with very nice hand Engraving design work. The top of the ring measures 5/8 inch in diameter.