Gemological Science International (GSI): Color

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About Gemological Science International (GSI)

(2:44)

Gemological Science International (GSI): Clarity

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Cats Eye VS Cats Eye / How To Identify Chrysoberyl Cats Eye / लहसुनिया रत्न की पहचान कैसे करे

(16:46)

Gemological Science International (GSI): Laboratory-Grown Diamonds

(3:58)

Gemological Science International (GSI): Carat Weight

(2:7)

Unlock the Secrets of Gemmology

(1:6)

GSI: Diamond Education Courses

(2:12)

Gemological Science International (GSI): Cut + Light Performance

(2:2)

CEO of GSI, Mark Gershburg: Interviewed by The New Jeweller Group at IIJS Mumbai 2016

(6:3)

Gemological Science International (GSI): Cut + Diamond Finish

(2:58)

Signet's testing and verification process for certified natural diamonds

(1:45)

GSI's Debbie Azar: Interview On Fox 5 With Christal Young

(3:56)

GSI: Testing \u0026 Screening

(2:10)

GSI Jewelry Design Workshop: Alpit Intodia

(1:13)

Debbie Azar: ‘The differences between natural and lab-grown diamonds’

(11:50)

GSI's Debbie Azar: Interview On Fox Business Network’s Varney \u0026 Co.

(3:17)