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Diamond Certificates

There are several diamond grading agencies around the world, each with its own way of determining what makes a diamond more or less valuable. So how does one choose what type of report/certification to trust?

Consider what is most important to you during your diamond-buying experience, as well as funds that you are able to allocate to find your perfect diamond match. These questions may help you decide which grading report is best for you.  


What are the most reputable diamond grading agencies around the world?

These labs are well known worldwide and come with high reputations, with the GIA being the most popular and recognised. Each would provide an excellent certification. The differences are mainly in diamond colour and clarity reporting, as these are the most subjective characteristics of diamonds. As long as the agency processing the grading report is consistent in their own reports, they can be trusted.


What does a diamond grading report inspect?

These are among the most common characteristics provided in a diamond grading certificate, within each specific report, information varies:

  • Carat weight
  • Colour
  • Clarity
  • Cut
  • Shape and cutting style
  • Measurements
  • Finish
  • Polish
  • Symmetry
  • Fluorescence
  • Reports often also include a comments section, clarity plot and proportion diagram.


Why is a diamond grading report important?

A grading report is performed by a third party that gives both diamond seller and buyer the information important for setting a monetary value to the gem. This is crucial because the third party is an agency of unbiased gem specialists who can give a true and professional opinion, thus prohibiting the seller from over-charging for a damaged, jeweller-enhanced, or otherwise lesser-valued diamond.


Are there different types of reports?

Yes, there are different types of reports offered from each lab. Since the GIA is often considered the standard, although all are reputable, let’s look at its report types. The GIA Diamond Dossier comes either with or without cut details. So, both dossiers give information on the 4 Cs, plus some of the other standard characteristics, but the dossier with cut details also provides information on the dimensions.

A GIA diamond report provides a more in-depth look into the diamond. It includes all the information of the dossier with information on blemishes, chips, feathers, inclusions, and the like. In this case, the GIA diamond report is a better certification as it contains more information, allowing a fair worth to be assigned to the diamond.

In conclusion, the GIA is the most often go-to for diamond grading reports, but there are others that are just as reliable. It all depends on what you care about when you are getting a diamond certification.

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