18kt yg sapphire and diamond ring. The center medium color sapphire is approx..33 and 6mm x 9mm oval. The two medium color sapphires on either side are approx .25 and 6mm x 7mm oval. There are two .01 diamonds on either side of the center sapphire. It weighs 3.8 grams and is size 5.25. It can be sized. It is hallmarked 90% 5.3. There is also a mark W. a triangle and a D. I'm not sure what they mean. Maybe the makers mark. It has been acid tested to be 18kt. Circa 1940's.It is in excellent condition for it's age.This will be someone's favorite ring.