Some time ago and a friend to accompany his uncle to go to a jewelry store to see the diamond, below the diamond has a GIA certificate, this certificate is also unclear, so we ask out of curiosity service personnel, and later throughservice personnel to explain that this certificate is the Gemological Institute of America diamond identification issued identification report is to prove that the diamond quality, that is by the GIA certificate can understand how the quality of a diamond, and then on thethe price impact, but unfortunately my English is not particularly good, does not recognize the English on the GIA certificate instructions, so look at every good play that are the same