Advanced GSI Info Guide: GSI vs GIA - Diamond Grade - Diamond Grading

Gemologocal Science International (GSI) Co-Founders Debbie Azar and Mark Gershburg discuss the importance of educating the end consumers about Diamond Grading.





For more information visit useful links:
Gemological Science International Youtube Channel
GSI vs. GIA
Diamond grade
Diamond grading
➥ official website: www.gemscience.net

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