I am hoping someone can help me determine whether I should buy a certain diamond or stay away based on the certification. Recently I have been looking for diamond rings and found a very nice setting that both my girlfriend and I liked very much. However, when I went back to the store to get prices and pick out a diamond for it they showed me a D color SI2 .93 pear shaped diamond. Now while I do not know much about diamonds I did look up information online about certifications but got conflicting information from what I found online and what I was told at the store. The diamond they had was certified by EGL but did not say US on it and when I questioned them about the difference I was told there is not difference. The thing is I do not have to buy a D color stone and would probably be happy with say a lesser color but do not want to go lower then SI2. Should I stay away from the EGL international certification and if so what are the reasons? Also, is it abnormal for a buyer to request the seller to send the diamond to GIA for another certification or is there another route I could go to confirm the grading?