Of course, the most direct function of the diamond certificate is to tell you the value of the diamond. It is a reference for you to buy diamonds, and it is also a guarantee for buyers not to buy fake diamonds. Different diamond certificates have different grading standards, which have different meanings for buying diamonds, but they are all your reference for buying diamonds. Taking Sarine optical performance certificate as an example, its grading standard consists of four parameters: brightness, sparkle, fire color and symmetry of diamonds. It can make a professional rating on the shining degree of the diamond and tell you whether the diamond is shining or not and how shiny it is. If you want to buy more shiny diamonds, you can refer to Sarine Light. So diamond certificate is necessary and useful.