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  1. GIA Diamond Grading Scales: Universal Quality Measure | GIA 4Cs

    Mar 14, 2013 · The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the …

  2. Diamond Rating & Grading Charts | American Gem Society

    This diamond rating chart can help you choose the right gem. Learn the color and clarity criteria by which diamonds are graded for valuation purposes.

  3. 4 C's of Diamonds | Diamond Guide, Chart & Order of Importance

    This diamond guide explains how the 4 C's of diamonds — cut, color, clarity, and carat — determine a diamond's quality grade. Learn what to look for when choosing the perfect diamond.

  4. Diamond Grading Chart and Diamond Certification Guide ...

    After carefully assessing and analyzing a diamond, the grading lab issues a detailed report or grading certificate that includes ratings and scores for each of the fundamental characteristics …

  5. Diamond Education - Diamonds Direct

    Learn everything you need to know about diamond grading from the experts at Diamonds Direct. Find out more about the 4Cs: Carat, Cut, Color, and Clarity.

  6. Diamond Grades: What They Really Mean - Gem Classics

    Oct 30, 2024 · Diamond grading is based on four key factors, commonly referred to as the 4 Cs: Cut, Color, Clarity, and Carat weight. These characteristics play a huge role in determining a …

  7. Understanding Diamond Grades and Their Impact

    The GIA established a systematic and scientific method for diamond grading, forever altering how diamonds were evaluated. This institution introduced the now-iconic Four Cs, which provide a …