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Diamond Certifications 101

Diamond Certifications 101

By now, you may be familiar with the 4C's of diamond quality: color , clarity , cut and carat weight.

Some diamonds from Kay are accompanied by an independent certification as to their quality and value. The report from that evaluation is called a diamond certificate - also known as a diamond grading report, diamond dossier, diamond quality document or diamond light performance certificate.

Your independent diamond certification is produced by trained professionals and will include the following information:

  • The 4Cs of diamond quality: the color, clarity, cut and carat weight of a specific diamond as viewed under magnification.
  • A diamond's characteristics: proportions, finish and treatments.

Depending upon the diamond, you may also receive a light performance certificate:

  • Light performance measures the bright white light (brilliance), bright color light (fire) and scintillation (sparkle) of a diamond.

Because no two diamonds are exactly alike, a diamond certificate can even serve as your diamond's fingerprint or identification in case of loss or theft.

Learn more about some of the most well-known diamond grading laboratories:

Gemological Institute of America

International Gemological Institute

Gemological Science International

Gemex Systems

American Gem Society


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