Complete 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
Diamond grade
Diamond grading
➥ official website:

Leave a Reply

Your email address will not be published. Required fields are marked *