DO is a diamond size indicator. 1 carat is 100 integral. Your 34 1 should have a decimal point of 34. 1, which is the size of 34 points. If you buy it from a second-tier jewelry brand, if it is inlaid with 18K, the quality is about 5000 to 1000, and the platinum inlaid one is several hundred times more expensive. If it is a first-line brand such as Chow Tai Fook and Lukfook, it is 10 to 1.