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  1. www.gia.edu › gia-aboutThe GIA Difference - GIA.edu

    Hace 1 día · 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.

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      Established in 1931, the Gemological Institute of America...

  2. www.gia.edu › schoolProfessional Gem Education | Gemology School – GIA

    Hace 1 día · Learn from the world’s foremost authority in gemology at GIA campuses around the world. Choose from gemology, jewelry, or design programs and pursue your passion in gems and jewelry.

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    • The Gemological Institute of America - Prosumer Diamonds
    • Everything you Need to Know about GIA (Gemological Institute of America ...
    • Gemological Institute of America - 46 Photos & 27 Reviews - Jewelry ...

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  4. www.gia.edu › emerald-history-loreEmerald History and Lore - GIA

    Hace 5 días · Emerald History and Lore. The 75.47-carat Hooker Emerald was worn by Ottoman Sultan Abdul Hamid II, the last sultan of the Ottoman Empire. Photo by Chip Clark, courtesy Smithsonian Institution, National Museum of Natural History.

  5. 4cs.gia.edu › interactive-4cs › colorDiamond Color | Gemological Institute of America - 4Cs

    Hace 2 días · Diamond Color. The color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value.

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  7. 4cs.gia.edu › interactive-4cs › clarityAbout Diamond Clarity | Gemological Institute of America - 4Cs

    Hace 2 días · Evaluating diamond clarity involves determining the number, size, relief, nature, and position of these characteristics, as well as how these affect the overall appearance of the stone. While no diamond is perfectly pure, the closer it comes, the higher its value.

  8. www.sarahelisejewelry.com › blogs › newsGem Genius: Understanding G Color and SI Quality Diamonds

    Hace 4 días · The Gemological Institute of America (GIA) is one of the most reputable organizations in the world for diamond and gemstone grading. The GIA color grading scale ranges from D (colorless) to Z (light color), with each grade representing a specific range of color. G-color diamonds fall within the "Near Colorless" category, exhibiting only a faint ...

  9. 4cs.gia.edu › interactive-4cs › cutAbout Diamond Cut | Gemological Institute of America - 4Cs

    Hace 2 días · Diamonds are renowned for their ability to transmit light and sparkle so intensely. We often think of a diamond's cut as shape (round, emerald, pear), but a diamond's cut grade is really about how well a diamond's facets interact with light.