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Learn more. Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.
GIA reports represent the highest standard of reliability, consistency and integrity. And now, GIA Report Check is available for all GIA reports, providing you with an additional level of assurance. With Report Check, you can quickly and conveniently confirm that the information on your report matches what is archived in the GIA report database.
GIA’s groundbreaking research and unbiased grading and analysis set the global standards that protect the gem-buying public. With campuses, research centers, and laboratory facilities around the world, GIA is the world’s foremost authority in gemology.
GIA is an independent, nonprofit organization that conducts gem research, educates gem professionals and sets the standards for determining diamond quality. One of GIA’s main functions is the grading of diamonds. You may have already heard or learned about the 4Cs of diamond quality: color, clarity, cut and carat weight.
The GIA Diamond Grading Report includes an assessment of a diamond’s 4Cs – color, clarity, cut, and carat weight – along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond’s proportions.
Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality. The institute does so through research, gem identification, diamond grading services, and a variety of educational programs.
Established in 1931, GIA is the world’s largest and most respected nonprofit institute of gemological research and learning. GIA discovers (through GIA Research), imparts (through GIA Education), and applies (through the GIA laboratory and GIA Instruments) gemological knowledge to the public.
GIA is the Largest, Most Respected Nonprofit Source of Gemological Knowledge in the World. GIA exists to connect people to the understanding of gems. As a long-standing scientific authority, GIA is not only a unique source for diamond knowledge, its grading reports inspire confidence wherever they appear.
From the Hope diamond to the Spirit of the Rose, the Taylor Burton and the Lesotho Promise, we are trusted by museums and top auction houses all over the world to grade and research nature’s finest treasures.
RESEARCH. The world leader in gemological research, GIA’s breakthrough discoveries deepen our understanding of gemstones and the world. LABORATORY. Through independent, unbiased gem grading and analysis, GIA strives to protect the gem and jewelry buying public by setting global quality standards. INSTRUMENTS.
