Two days before the students returned from the United States, I heard that in studying in the U.S. is a gem identification, is one called learning by the Gemological Institute of America, now studies back home, I vaguely heard that this AmericanGemological Institute of America, do gem identification intermediaries, for teaching and identification of the work, not for profit, it is recognized gem identification of the authority of the industry, it is said by them in identifying the gems, they will send the GIA certificate toprove the genuineness of the gem and other information, as for those I have heard how much is true, I also like this to see my students look.