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Diamond Certification

Unbiased, independent and completely yours; your diamond, proven.

What is a Diamond Certificate?

Before the purchase of your certified diamond, you should review a copy of its certificate as proof that it has undergone an unbiased, professional examination from an independent laboratory.

Why Does It Need A Certificate?

A diamond certificate, also called as a diamond grading report or diamond dossier is an evaluation created by a team of trained professionals. The diamond is measured, examined and inspected closely. This is achieved using a jeweller’s loupe, a microscope, and other industry tools. A diligent certificate includes an analysis of your diamond’s dimensions, clarity, colour, polish, symmetry, and other characteristics. Many round diamonds will also include a cut grade on the report. Some diamonds are laser engraved with a serial number on the girdle, this number matches the serial number of the certificate. This all gives you proof that your diamond, is truly yours and completely unique. 

Who Issues The Diamond Certification?

Several well-known international grading agencies have high reputations, however, some bodies are much stricter than others. Each entity grades and describes diamonds differently. It is important to remember that not all reports are created equal and the cost of the diamond is not comparable across the different certification bodies. Today most diamonds above 0.20ct in weight are certified by one of the below bodies.

  • Gemological Institute of America (GIA)
  • American Gemological Society (AGS)
  • Diamond High Council (HRD, which is an abbreviation of the Dutch “Hoge Raad voor Diamant”)
  • International Gemological Institute (IGI)
  • European Gemological Laboratory (EGL)

If you want to talk to anyone regarding your diamond certificate, please do not hesitate in contacting one of our diamond experts today on;  +44(0)2081440035 or email

“Diamond Certification: What does each term on a diamond certificate mean? Learn more with our diamond education essentials.”

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