Here is an an old sapphire and diamond ring. I am not a jeweler but a friend has helped me with my description. The diamonds are approximately 1/2 carat each. They are European cut with SI clarity. They are nice white diamonds with H-G color. The blue sapphire measures 5.75 mm by 4.8 mm and is 3.7 mm deep. The sapphire is abraded. The setting is platinum. The inside measurement of the ring is between 15 mm and 16 mm. I am not sure how old this ring is but I know that it is at least sixty years old..