Perhaps some people do not know how to identify diamonds fineness, of course, not some people, probably the vast majority of people do not know the method used to identify the purity of diamonds. If you really want to learn to identify the method, or go to gia is better, because it is specifically to identify diamonds agencies to identify the results are generally more authoritative and credible, and sometimes I regret he did not choose to go there. At that time, the parents listened to the words, not their own minds, and now that I think all feel regret, but fortunately if they are interested in learning the words and still be able to learn a little knowledge.