First of all, pt950 means that the platinum content reaches 95% as much as possible, which is the most common platinum on the market, commonly known as platinum. D stands for the diamond ring, 19, 100 is one carat, which is 0.2 grams. Colors from D to Z are divided into 23 grades, D E F is close to colorless, and F-G is white, which is very good and the definition is the best on the market. It is difficult to see the flaws, and there is an extremely rare clarity LC, which is flawless; There is VS, that is, professional technicians can also see the needle tip defects under a magnifying glass of ten times. Your ring should be good, 8 thousand to 10 thousand should be normal, and if the brand is good, it will be more than 10 thousand You can ask me again if you don't understand.