Helpful information for members of the public looking to sell diamonds & diamond jewelry
Value & Importance of Diamond Certificates
Diamond Certificates detail all of the vital characteristics of a specific diamond. Diamond grading laboratories include The Gemological Institute of America (GIA), European Gemological Laboratory (EGL), American Gem Society (AGS), International Gemological Institute (IGI), among others. While having a diamond certificate is always useful when selling a diamond, the reliability of their reports can vary. The Gemological Institute of America (GIA) is the only lab whose diamond reports are universally accepted. GIA is a non-profit organization created solely TO protect the public. Their reports are considered final and are not open for interpretation. This makes selling a GIA certified diamond much easier because a buyer can be absolutely certain of the diamonds characteristics. The accuracy of reports from other laboratories can vary to some degree. This diminishes their value during the selling process. Even so, for member of the public selling a certified diamond is always simpler than selling an un-certified one.

Can & should I have my diamond certified?
Members of the public can send in their diamond to have it certified. In the case of large, high quality diamonds, having a reputable certificate can mean thousands of dollars in additional value. In the case of a smaller or a lower quality diamond, the value of possessing a certificate is diminished. You may want to consult with a trustworthy gemologist about the benefits / costs of having your specific diamond certified.
How much does it cost to certify a diamond?
The cost of certifying a diamond varies from lab to lab. As the size of a diamond increases, so does the certification fee. Other costs include insurance and shipping. Most labs publish the certification fees on their website. Here is a link to GIA’s certification fee table.
Why wasn’t my diamond certified?
Today, most high quality diamonds are certified. If a recently purchased diamond (within 10 years) is not certified, there is probably a reason for this. This can include a poor make, high fluorescence, low clarity, low color, etc… Lower quality diamonds are rarely certified because the benefit of the certificate are outweighed by the certification costs.
What are the differences between the Diamond Certification Laboratories?
Here is a link to a chart which explains our interpretation of the differences between the most common diamond certificates found in the US market.