by Luna » Aug 4, 2001 Hi. I received a diamond with AGS DQD yesterday and I went to see a graduate gemologist for verification of the diamond. Everything was fine except the color. He used the very sophisticated machine to test it and the result was F instead of E which was on the AGS DQD. He tested it again but the result was again F. Now, I really do not know what to do. I has never happened to me before. Is AGS's color grading more lenient than GIA's? Should I ask the second opinion ? Should I return the diamod? Please help me. Thank you very much.