Colored Gem Rough Grading and Analysis

Learn everything you need to know about buying and selling rough gems

Next Course Begins: 19 Aug 2019 / 2800 USD

About the Course

This immersive program is designed to give you a deep insight into the trading of colored gem rough.

Through practical exercises and the use of field gemological tools, you will learn the basics of the grading, analysis and valuation of colored gem rough.


As part of the “Colored Gem Rough Grading and Analysis” course, a field trip is included in the program. We have organized a trip on day 5 and 6 to Chanthaburi, a province in southeast Thailand, fringing the Gulf of Thailand, known for gem dealing and tropical fruit.

The trip is 2 days and 1 night, leaving Friday morning and returning Saturday night. The cost of the trip is included in the tuition fee for this program (transport, food, accommodation included).

Who should take this course


The Colored Gem Rough Analysis course has been developed for:


Gem buyers: professionals wanting to develop new competencies and be able to trade colored gemstones at their sources.


Gem professionals and gemologists: professionals wishing to further develop their competencies about colored gemstones.

Next Course Begins:

August 19 - August 27

8 days / Full Time

9:30 am ( Mon-Sat, Mon-Tue )

Course Outline

  • Identification of different types of colored gem rough
  • Separation of synthetic and treated gem rough from the natural gem rough
  • Sorting and grading of rough parcels
  • Planning and estimation of the recovery/yield
  • Assessing the value of single pieces and lots of rough
  • Learning the most common treatment techniques of rough
  • Introduction to the crystal specimen market
  • First class rough collection including natural, treated, synthetic and imitation
  • Field trip to a colored gemstone market and to a mining area


  • English Language Proficiency
  • 18 Years of Age
  • Previous Gemological Training (or equivalent in experience in the gem trade)

Career Paths

Graduates from the Institute of Gem Trading will have an increased ability to find a position in the trade or to start their own business.

Potential Career Paths Include:

• Gem Broker
• Recutter
• Rough Gems Buyer
• Field Gemologist
• Gems Business Owner

How To Apply

Applying for a class at the Institute of Gem Trading is easy. Once you’ve decided which course or courses suits your needs, simply head over to the courses page and click Apply Online.

From there you can choose which session over the course of the year that you’d like to attend. Payments can be made with a credit card after you’ve selected your course and your session date.

We look forward to seeing you!

Apply Online.

International Students

We designed our modular courses with students from all over the globe in mind. No matter if you’re coming from Thailand, Europe, America, or beyond, students from most countries should have no problem getting a 30 day Thai tourist visa.

All of the IGT courses can be taken within this visa period so as long as you don’t come too early or stay too late, you should be able to complete your IGT with no added stress about visas.

If you have a question or problem with getting a Thai tourist visa, please feel free to email us

Tuition Fee

2800 USD
Additional Costs

The tuition fee for IGT classes includes everything you need to complete the course including training manuals and  a student kit with a variety of tools.

Students are encouraged to bring their own loupe and torch if they have one that they prefer.


Tuition fee does not include 7% VAT.

How To Pay

Payments can be made via credit card through our secure website payment processor or in cash (Thai Baht) at our Bangkok office.

Have Questions?

If you have any comments or questions about IGT courses, scheduling, or other concerns, please do not hesitate to contact us via email or phone.


August 19 ‐ August 27
9:30 am

Full Time / Mon-Sat, Mon-Tue

October 14 ‐ October 22
12:00 am

Full Time / Mon-Sat, Mon-Tue

November 11 ‐ November 19
9:30 am

Full Time / Mon-Sat, Mon-Tue

December 11 ‐ December 19
9:30 am

Full Time / Wed-Sat, Mon-Thu

Prefer Other Dates?

If you would like to request a date for a class or schedule private classes for small groups or companies, please email us.

Contact Us