Diamond Certifications

Diamond certification institutes, agencies, and appraisal companies offer an objective, 3rd party rating and/or valuation of your diamond rings.

Below are the most trusted diamond certifications:

Gemological Insitute of America (GIA)

Established in 1931, the GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.

Accredited Gemological Institute (AGI)


The Accredited Gemological Institute of New York City (AGI) is an independent diamond and jewelry appraisal company at the service for customers who are searching for jewelry and diamond appraisal.

EGL USA Gemological Labratory

The American arm of European Gemological Labratories, EGL USA provides cutting-edge gemological research, testing, and laboratory analysis.  EGL USA delivers evaluations with clear disclosure of diamond, gemstone, and jewelry features, including known treatments.

International Gemological Institute (IGI)

Established in 1975, IGI diamond reports assess a diamond's cut, color, clarity, and carat weight according to international standards.

American Gem Society (AGS)

AGS Laboratories offer diamond grading reports for round brilliants and fancy shapes, as well as mounted goods, brown diamonds, custom and proprietary reports.

Gem Certification and Assurance Lab (GCAL)

GCAL provides gem certification and assurance, laser Inscription, metal testing, light performance, and more services.

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