Diamond Certification Labs

CERTIFICATES AND LABS

You should always request a diamond grading report—also known as a certificate; for diamonds over one carat. This report documents the diamond’s unique characteristics. Issued by an independent gemological laboratory, the report examines and identifies the 4Cs—color, clarity, carat weight and cut; along with finish, fluorescence and symmetry. In addition to cut, some reports also grade the light performance on the diamond. The report will include a diagram of all the inclusions unique to the stone. In some cases, the diamond can be laser inscribed with the number of the report to ensure future identification.

Some gemological laboratories that issue diamond grading reports in the United States include:

• American Gem Society (AGS) 866.805.6500
• European Gemological Laboratory (EGL) 212.730.7380
• Gem Certification and Assurance Lab (GCAL) 212.869.8985
• Gemological Institute of America (GIA) 800.421.7250
• International Gemological Institute (IGI) 212.753.7100

A grading report is not the same as an appraisal, which is done after you purchase the diamond and helps you to verify the value of your purchase.

Always consult an expert certified gemologist before investing in a diamond. To speak with an expert call or email (561) 716-0377, This e-mail address is being protected from spambots. You need JavaScript enabled to view it .