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A Complete Guide to Diamond Certification

GSI: Offering Diamond & Jewelry Confidence Gemological laboratories are an essential part of the diamond industry. They provide the necessary certification and testing of diamonds and jewelry. Jewelry retailers rely on Gemological Science International (GSI) as an independent third party to ensure the jewelry they sell is accurately represented. This gives consumers of diamonds and jewelry confidence in their purchases. GSI offers a look inside its state-of-the-art laboratory, showing how diamon

GSI is not just a gemological laboratory that does certification only. We are a multifaceted company with a wide range of services that complement each other. In addition to our laboratory services, we also offer screening and detection services for undisclosed lab grown diamonds in natural diamond jewelry and undisclosed natural diamonds in lab grown diamond jewelry. We are the global leaders in screening and detection, and the only laboratory in the world that has the expertise to do this glob