Diamond appraisal beyond the 4C

Appraise your pre-owned diamond digitally. Sign up for free, upload your certificate and get an instant appraisal.

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An appraisal beyond the 4C's

ExJewel allows you, directly on ExJewel’s platform, to check diamond grading reports for any diamond that has a report or certificate. ExJewel is not responsible for the accuracy of the information. It does not own the information provided here. 

Until the middle of the twentieth century, there was no agreed-upon standard by which diamonds could be judged. GIA created the first, and now globally accepted standard for describing diamonds: Color, Clarity, Cut and Carat Weight. Today, the 4Cs of Diamond Quality is the universal method for assessing the quality of any diamond, anywhere in the world.

At ExJewel, we believe in appraising diamond beyond the 4Cs.


ExJewel evaluates every diamond's origin that is uploaded on its system.

Conflict-free level

ExJewel evaluates if a diamond comes from a war zone


ExJewel can appraise lab-grown diamonds as well as treated diamonds

Certified goods

ExJewel evaluated every gemological lab that will affect its resale value


Diamond Grading Reports and certificates are issued by laboratories and contain pertinent information as to the characteristics of the stone. While different laboratories vary in terms of reliability of grading, this is a strong starting point when it comes to determining exactly what you have. These allow ExJewel to provide you with a more accurate initial price range as we have an understanding as to the reliability of the source of information.


The GIA (Gemological Institute of America) is the most respected laboratory in the industry and is the foremost authority in gemology. We hold the GIA’s grading in high esteem; our own gemologists are in fact GIA trained and providing us with your GIA report ensures a quick and accurate estimate for your diamond. A report from the GIA is seen as very reliable throughout the industry and gives you the advantage of receiving a very accurate estimate for your diamond.  There can be substantial differences between GIA grading reports and those of other laboratories and local jewelers. AGS (the American Gem Society) or HRD are other trusted and well-respected laboratory in the industry.

In comparison, we consider EGL’s (European Gemological Laboratory) and IGI’s (International Gemological Institute) certificates to be reasonably reliable, however their grading standards do tend to be lenient in comparison to the GIA grading standard. Because their grading can vary by one to two color and/or clarity grades, the initial estimate range may be reasonably wide.

Jewelry professional - gemologist

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ExJewel has designed the first digital appraisal service including: valuation, collection, photos, description, uploading online.