The P-level here refers to the clarity of the diamond, and the clarity refers to the severity of defects or impurities in the diamond. In the international diamond 4C standard, diamond clarity grades are divided into five grades, including 10, namely: LC, VVS 1-2, VS 1-2, SI 1-2 and P 1-3.

P grade has a serious impact on diamonds. P-grade is the worst grade of jewelry and diamonds, and it is also called defect grade. As can be seen from the crown of the diamond, there are serious flaws inside and outside the diamond. This has a great influence not only on the value of diamonds, but also on the price of diamonds.

In the classification standard of national inspection, P grade refers to gem-grade diamonds with the lowest clarity grade, and diamonds below P grade are generally not regarded as gem-grade diamonds. When buying diamonds, it is generally not recommended to buy P-grade diamonds. These diamonds have defects visible to the naked eye, which will greatly reduce the visual effect of diamonds.