ISG/Chatham Gem Loan Program!

The International School of Gemology and Chatham Created Gems are proud to present to our ISG Graduates, ISG Students*, Senior Members or higher of the National Association of Jewelry Appraisers, and Jewelers Helping Jewelers members with a special gemstone loan program. This special program is designed to provide you with hands-on experience in the identification and evaluation of a variety of created and treated gemstones. Included in this special loan program set is a variety of the following:

  • Chatham Flux Melt Emerald
  • Chatham Created Diamond
  • Chatham Created Opal
  • Chatham Flux Melt Emerald Crystals
  • Russian Hydrothermal Emerald
  • Chatham Flux Melt Ruby
  • Chatham Flux Melt Sapphire
  • Fracture Filled Ruby
  • Chatham Flux Melt Ruby Crystal Rough
  • Created Sapphire by Pulled Method
  • Hydrothermal Emerald
  • Beryllium Treated Sapphire
  • Dyed Green Agate
  • Inomari Flux Melt Emerald
  • Biron Hydrothermal Emerald
  • Color Infused Quartz

Here are the specifics and required legal disclaimers of the ISG/Chatham Gem Loan Program:

Included in Gemstone Study Set: 20 Gemstones of a variety of types as listed above. Each stone comes pre-identified to help your study.

Time to Study: Each student will have 5 days from the day they receive their set to study the set. On the 6th day set must be placed in return postage with date stamp via US Postal Service Priority.

Cost for Study: $150.00 with a refundable $350.00 security deposit.

FREE Gemology Classes Included for NAJA and JHJ Members

Before you order, take our free ISG Mini-Courses: Chatham Created Gemstones and ISG Introduction to Treated Gemstones. Free from the International School of Gemology's Gemstone Academy.These free courses will help you become more efficient in the identification methods for all of the specimens in the Chatham Gem Loan Program. ISG Students and Graduates already have the full ISG Created and Treated Gemstones course.    


The ISG/Chatham Gem Loan Program is available to all ISG Graduates, ISG Students* and Senior Member or above of the National Association of Jewelry Appraisers. Gemstone set will include 20 specimens of a variety of combinations of the above created and treated gemstones. Gemstone Sets are limited in availability. We will ship the sets based on the order in which the requests are received. All shipping is via US Postal Service Priority Insured. Student is responsible for return shipping costs.

The Gemstone Loan Program is available only to students in the United States. As the Covid-19 situation lessens its impact on international shipping we will extend this program to all students.

*ISG Students must have completed the Created and Treated Gemstones and the Gemology Tools and Techniques courses to qualify for this loan program.

Please contact the ISG office for any further questions. This is a unique opportunity for everyone to gets hands-on training in the identification of created and treated gemstones. Please complete the Registration Form below, you will be taken to the PayPal payment page once complete. By completing and submitting this form, you agree to the contract set forth below for the ISG/Chatham Gem Loan Program.