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Diamond Courses

Whether you are a seasoned industry veteran or a newcomer to the world of diamonds, PGSL offers classes that build the skill set of the individual to make you more knowledgeable in the field. All courses emphasize practical, real-world application. This means nurturing skills that you will need to use in the course of everyday business transactions. The course descriptions listed below provide a brief synopsis of what the prospective student can expect from a class. 

Diamond

Diamond Grading & Identification

This 20-hour course teaches diamond grading and evaluation through lectures and hands-on labs. Students work with simulants and treated stones, learn pricing and industry standards (FTC, CIBJO), and earn a Certificate of Completion.

This course covers common diamond grading challenges, such as fluorescence, borderline grades, and recut potential. Students gain hands-on experience and learn to identify color-treated diamonds in both irradiation and HPHT methods.

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KM (Internal) Laser Drill Treatment Detection

This one-day course teaches students to identify diamonds treated with KM (internal) laser drilling through hands-on practice with sample stones. A Certificate of Completion is awarded.

Topics in Fancy Color Diamond Evaluation

This course introduces color science and the Munsell system for consistent gemstone and diamond grading through hands-on lab work. A Certificate of Completion is awarded.

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Professional Gem Sciences

Laboratory, Ltd.

​5 S. Wabash Avenue, Suite 315​

Chicago, IL 60603

   

© Copyright 2025  PGSL, Ltd.

Monday - Thursday

9:30am - 5:00 pm CST

Friday - Saturday:

By appointment only

T: (312) 920-1541



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