GSI is a global company, with locations across four continents. GSI is one of the largest gemological laboratories in the world by volume of goods we analyze.
Gemological Science International, or GSI, is an independent gemological organization that is one of the largest gemological entities in the world.
GSI is a global company, with locations across four continents. GSI is one of the largest gemological laboratories in the world by volume of goods we analyze.
GSI is a globally renowned gemological organization that offers a myriad of services to the diamond & jewelry industry, including grading reports.
GSI is the leader in the testing and detection of undisclosed lab-grown diamonds in finished jewelry. The company also offers a variety of educational programs ...
This badge recognizes completion of the Gem Science International's pre-eminent course on diamond essentials. Consisting of over learning 3 hours.
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This Website is maintained by one or more entities throughout the world that does business as Gemological Science International ('GSI'). Such entities are Gem ...