This diamond is of good quality, good color, colorless F color and good clarity. VS 1 P stands for diamond polishing, VG stands for very good, which means very good polishing. S stands for symmetry, VG stands for good, which means good symmetry. C stands for cutting, and EX stands for perfection, which means perfect cut. GIA certificate refers to the certificate of American Jewelry Association, and PT900 means that the holder's material is platinum. This diamond is good, the price is around 6000 yuan. If it is a brand, it will be more than 65438+100000 yuan. It should not be Chow Tai Fook's brand. Chow Tai Fook General Mosaic 18K.