From my experience, many people who own diamond jewelry underestimate the importance of its' grading. First of all, it's the only way to discover that the stone is real because the market is full of fakes. Secondly, grading will give you all the unique info about the stone. GSI is one of the best of international gemological laboratories, where you can grade the stone. It not only uses modern technologies but does many types of research to provide costumers with the best service.