Gem and Jewelry Training Center
The Gem and Jewelry Institute of Thailand
(Public Organization) ITF-Tower Building.
3rd Floor, Silom Road, Suriyawong
Bangrak, Bangkok 10500, Thailand

Tel: +66 2634 4999 ext. 306
Fax: +66 2634 4999 ext. 304

Mon - Fri: 09:00 - 17:00
Closed on Thai government public holidays

Education Schedule/Fees
Application Form
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FGA - Gemmologist Diploma Programme

FGA Class

FGA - Gemmologist Diploma Programme

The Gem & Jewelry Institute of Thailand, in collaboration with the Gemmological Association of Great Britain (Gem-A), the world's first gemological institute, is pleased to offer training towards the Gem-A Gemmology Diploma. This is the single most prestigious international gemological qualification in the world.

Upon completion of the Diploma course, students will be confident at handling, testing and identifying a wide variety of gemstones. The course will also build participants' confidence in purchasing gems.

Qualifications needed

No previous gemological knowledge is required. Only an ability to read and write English.

Language of Instruction



The Gem-A Diploma in Gemmology will be awarded to those who successfully complete the exams. Students are then eligible to become Fellows of the Gemmological Assocation (FGA), the world's oldest gemological organization.


260,000 Baht

Course contents
  1. Gem and Gemology
  2. Observation & Magnification
  3. Materials and Structure
  4. Durability
  5. Weight, Density & Specific Gravity
  6. Light and Optics
  7. Colour
  8. Other Gem Properties
  9. The Geology of Gems
  10. The Gemstone Pipeline
  11. Fashioning Gemstones
  12. Gem and Jewelry
  13. Treatment
  14. Imitations, Simulants & Synthetics

gem-a stones

Participants will receive the following as part of the course fees:

  • Complete Theory Notes and Practical Lab Manual
  • 10X Loupe and Pen Light
  • Hand-Held Spectroscope
  • Stone Cloth and Tweezers
  • Crystal Structure Kit