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The Gemological Institute of America (GIA) is one of the most trusted names in the industry. The GIA is an unbiased, non-profit organization which established the world's most recognized and accurate system for grading diamonds. While GIA is the most widely known laboratory, there are numerous other laboratories which are both reputable and accurate, including the American Gem Society (AGS), the European Gemological Laboratory (EGL), the Diamond High Council (HRD) and the International Gemological Institute (IGI). These certifications are quality reports and do not establish values. Next - Glossary 
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