The Gemological Institute of America, or the GIA founded in 1931, is an autonomous, non-profit organization and is said to be the world's foremost authority in gemology. Founded in 1931, GIA's mission is to protect all buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality. This prestigious institute has its headquarters in Carlsbad, California and functions actively in 14 countries, with 7 laboratories, 12 campuses, and 4 research centers all around the world. With its globally known library and subject experts, GIA operates as a genuine source of jewelry and gem information center for the public, the trade and the global media channels. GIA certified diamonds, guarantees the consumer that the stone has been examined by an unbiased gemologist who ensures that maximum level of reliability, science, and professionalism is maintained.

The American Gem Society or the (AGS) was founded in 1934 and is based in Las Vegas, Nevada. It is a reputed trade association that includes retail jewelers, suppliers, self-regulating appraisers, and selective industry members. Members have to maintain a superior ethical code and prominence is given to consumer education and protection. This institution aims at training and certifying jewelers, gemologists, and jewelry appraisers. The AGS specializes in grading and for that it maintains its own cut clarity, and color standards.

The European Gemological Laboratory or the (EGL) is a self-governing gemstone grading institution that was founded in 1974 in Belgium. It renders wide gemological services ranging from diamond certification and reports to maintaining accuracy and industry standards. The organization maintains a global platform and has an eminent presence in the diamond trade centers. It also runs an elaborate educational program for safeguarding public interest and upraising the level of professionalism in the jewelry industry. An EGL certificate is issued after thorough scrutiny of a diamond is done and thus is a prized document that assists consumers while purchasing a diamond.

The International Gemological Institute or the (IGI) is an organization that certifies the authenticity of diamond, colored stones, and jewelry. This institute was established in 1975 and has its headquarters in Antwerp, Belgium. IGI is the largest independent gemological laboratory worldwide. It aims in providing jewelry professionals and consumers ample of knowledge regarding reliable diamond jewelry and also runs schools of gemology in several locations around the globe.