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- RG/RGA Legacy Entrance
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- Exposing the Truth about Lab-Created Diamonds
- AGTA Hobbles Dealers and Buyers
- Appraisers -v- Gem Labs…a Legal Imbalance!
- Understanding the Classification of Diamonds
- Cremation Diamonds: Insuring and Litigating
- Let’s Talk About Gemology Credentials
- Hometown Jewelers and the Force Majeure Clause
- Following the Critical Angle of Diamond Grading
- When Breitling Brought the Airmen Home
- Let’s Open a Refractometer
- How Tanzanite Creates Rare and Beautiful Colors
- The Story of Fire Agate Gemstone
- Measuring the Energy of Light
- Quick Reference Guide to Sunstone
- ISG Seeing the Invisible Light
- Registry of Graduates
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- About the ISG
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Video Lectures and Learning
ISG Video Learning Page
Welcome to the ISG Video Learning Page. Here you will find a selection of teaching videos covering a variety of gemology topics. We encourage you, student or visitor, to spend some time learning more through our unique teaching video presentations.