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GIA is an independent nonprofit that provides research, education and laboratory services for gemstones and jewelry. Explore the latest news and updates on field gemology, laboratory-grown diamonds, pearls, rubies, tourmalines and more.
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My Laboratory & GIA Laboratory Client Portal. Now featuring...
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Each Gem page features Gemological Information, a Buyer’s...
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Learn gemology on diamonds and colored stones at the GIA school. Earn a diploma and explore career paths in the gem and jewelry industry.
Learn about the history, research, services and education of GIA, a nonprofit institute for gemology and jewelry arts. Find out how GIA developed the "four Cs" of diamond grading and its international reputation.
Há 3 dias · GIA is the world’s foremost authority on diamonds, colored stones, and pearls. Learn about its history, research, education, and quality standards in gems and jewelry.
Watch videos from GIA, the largest and most respected nonprofit source of gemological knowledge in the world. Learn about diamonds, gemstones, jewelry, and more from GIA experts and field gemologists.
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Learn about diamonds, colored stones, pearls and jewelry with GIA's eLearning courses. Flexible, self-paced and led by experts, you can earn a diploma or a credential in gemology.
GIA is the world's leading authority on diamonds and gemstones, grading and researching the most precious stones. Learn about the 4Cs, explore famous diamonds, and get tips for buying and selling with GIA.