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  1. As the creator of the Diamond 4Cs and the International Diamond Grading System™, GIA is trusted by museums, auctions houses, and consumers all over the world to grade nature’s finest treasures.

  2. www.youtube.com › user › gaiamtvGaia - YouTube

    Our exclusive videos go beyond the boundaries of mainstream media to reveal new and enlightening perspectives to help you thrive in our changing world.

  3. Jul 21, 2014 · This informative four-minute video will help you choose a diamond, with the help of GIA, creator of the 4Cs of diamond quality. Whether you’re looking to buy loose diamonds, or how to buy a ...

    • 4 min
    • 1.3M
    • GIA (Gemological Institute of America)
  4. Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.

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  5. With 65,000 volumes, 230,000 images, 2200 videos, and 1200 periodicals, the Richard T. Liddicoat Gemological Library & Information Center and Cartier Rare Book Repository & Archive is the largest, most complete library of its kind. search the catalog.

  6. Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

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