Gem-A Gemology Diploma Course

The Gemology Diploma is one of the most prestigious international gemological qualifications and gives students a more in-depth understanding of gemology and the principals of gem-testing and enhanced gem identification skills. The courses cover a wider range of gemstones, including synthetic gems and treatments, and builds upon the practical and theoretical knowledge learned during the Foundation course.


To register, call (865) 692-6000 ext 3610 from 8am EST to 5pm EST Monday through Friday.

Please email for more information.

Prospective students must read and agree to the Terms & Conditions before registering.

JTV Gemological Training Center, Knoxville, TN Est. 2020

Course Objectives

  • Knowledge of treatments and synthetic materials, including their production, use, identification and the resulting implications for the gem trade.
  • Consider the ethical, environmental and technological implications and applications of gemology.
  • Interpret results accurately from advanced gem testing equipment
  • Apply scientific principles and concepts in solving problems relating to gemology, and to assess the validity, reliability and credibility of scientific information related to gemology.
  • Demonstrate a logical approach to gem testing, as well as be able to acknowledge limitations and uses of certain tests.
  • Learn about the origin and formation of gemstones and the various stages of the gemstone pipeline.

Course Materials Provided

  • Fully illustrated comprehensive Diploma Course Notes
  • Diploma Practical handbook and workbook
  • Gem Set: Diploma Stone set containing rough and cut specimens

Methods of Study

  • 1 full day classroom based practical (7 hours per week) with additional theoretical elements delivered remotely. Total classroom hours 112
  • Online element: online assessed coursework (4 hours per week)
  • Self-guided study


  • 20 Stone Practical examination
  • Two written theory examination papers
  • Assessed online coursework and project

On successful completion of your Gemology Diploma, you may apply to become a Fellow of the association. Fellows of the Gemmological Association (FGA) can use the post-nominal terms that are internationally recognized as symbols of excellence in the gem and jewelry trade. FGA status conveys your knowledge, integrity, membership of a professional body and commitment to professional development and is highly recognized within the Global gem trade.

Students in a classroom

2024 Class Dates and Cost

The Gemology Diploma Course will be held over a six-month period (TBA) and includes 16 total in person classes and 12 theory classes delivered online. The in-person classes will be taught on the following Mondays from 9:00 am to 5:00 pm EST (7 hours) with an hour lunch break:

2024 Dates:


Final Exams TBA in 2024.

The Gemology Diploma Course includes 112 total classroom hours and the cost is $7,700.00.

Meet the Instructor:
Charles Evans
BSc in Gemmology and Jewelry Studies, diplomas in FGA, DGA and GIA

Charles Evans is a member of the JTV education team and is excited to share his passion in and knowledge of gemstones, minerals, and jewelry with others. With a BSc in Gemmology and Jewelry Studies, plus both FGA and DGA diplomas, and GIA qualifications, Charles's academic credentials are also augmented by many years of experience in lab gemology. Having lived and worked in nine different countries, he has visited mines, trade shows and gem markets all over the world.

For years he worked for Gem-A in London where he set up their new laboratory and led regular field trips. He has done talks around the world on technical aspects of gemology as well as gemstone supply chains, diamond mining, and melee. He is also a qualified appraiser and holds NAJA certification. Membership of AGA, ICA, Gem-A, SGA, MINSOC, MSA, USFCG and UKFCG ensures his knowledge is always up to date.