General the diamond rank does not have division A, B, C, D, the E, Internationally. the diamond quality should consider the standard “4C”, the diamond weight, the color, the cutting, this article introduction actually refer to the graduation.

The diamond level standard is only the non-flaw level, the micro flaw level, the slight defect level and so on, the difference can only be the industrial used diamond again. Certainly the diamond rank is divided the law to be very thin, generally the reader is not unnecessary to understand such thin. Moreover, the choice diamond light looked that is only insufficient, but should also from the color, the weight and the stone cutting several factor whole appraisal diamond quality, has achieved these, could cause the diamond to resources are well used.

If one point is not to be unqualified in the middle of these, then cannot also be regarded the diamond. For instance a diamond is only good, but the color is bad, the stone cutting is not good, cannot get angry, the flash, then cannot say that it is the good diamond. If “4C” good, and the diamond is also big, then the value is higher