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American Gem Society (AGS)

American Gem Society (AGS)

AGS Laboratories developed the AGS Performance-Based Cut Grading System.

The key to the system is tracing light as it travels through the diamond. That's what determines whether a diamond looks bright and lively or dull and mediocre.

The lab offers several levels of grading reports. The most popular is the Diamond Quality Document. It shows cut (if available), color, clarity and carat weight accompanied by a profile showing that individual diamond's measurements, along with a custom plot for the actual facet arrangement and inscription details.


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