 Since 1931, GIA’s expert training and world-class professional credentials have helped retailers earn customer trust and close more sales. Learn more about the coveted GIA Graduate Gemologist Diploma, and GIA’s full array of education programs, classes, and online resources designed to keep you and your staff at your professional best. |
 GIA revolutionized the diamond industry in 1955 with its Diamond Grading Report. Based on the 4Cs of diamond value and International Diamond Grading System™, both of which GIA created, the grading report provides a comprehensive analysis of quality and authenticity for diamonds in the D-to-Z color range. Learn more about why a GIA Diamond Grading Report is so important, as well as how GIA grades diamonds. |
