Advanced Gemmology

The Advanced Gemmology course, developed by the WGF (World Gem Foundation), is largely devoted to the imitations of gemstones, the different methods of manufacturing synthetic gems – as well as techniques to distinguish them from their natural counterparts – and the detection of the different treatments used to improve the appearance and/or value of gemstones.

Many topics are covered in this course: artificial gems and composites, methods used to manufacture synthetic gems including Verneuil, Czochralski, melting, hydrothermal, copper skull, zone fusion, horizontally oriented crystallization, HPHT, CVD, detonation, sublimation and modified Stöber, and the different characteristics to identify them. Treatments and techniques for improving gemstones will also be discussed, including heat treatment, surface and volume diffusion, lead glass fracture filling, filling of fractures with cobalt-doped lead glass (for sapphires), flux crack healing, methods of improving the purity of diamonds, HPHT treatment of diamonds, quench-crackling, surface modification, laser drilling, irradiation and scientific gem identification techniques.

Who should take this course

This course is aimed at both the curious who wish to know more about the world of gemstones, at students wishing to become professional gemologists and at gemologists wishing to upgrade or deepen their knowledge.

Course Format and Updates

This course is available:

  • Online, in digital version
  • Online, in printed version
  • On-site at the EGM (in French)

As with all WGF courses, you benefit from special advantages:

  • Regardless of the formula chosen, the course is always given in digital version.
  • The photos of gems available on this course have been rewarded for their high quality.
  • Your access to the courses in digital version is acquired for life.
  • The WGF makes an update every two years. Each student receives the digital version of this update for life and free of charge, and thus remains up to date with the latest developments in the world of gemmology
  • The online courses are accompanied by individual tutoring.


You must have passed the Basic Gemmology examination.

However, this course may be of interest to professional gemologists wishing to update or enrich their knowledge. In this case, please contact the EGM at

If you wish to obtain the Career Gemmologist or Coloured Gemstones Professional diplomas, it is strongly advised to respect the organisation of the courses as indicated in the right-hand column.

Language and schedules

The online course (digital and printed versions) is given in English

It is also available in French. To register, please go to the French page of the course: Gemmologie avancée.

If you wish to take this course in Spanish (digital and distance learning version only), please contact us at

If you choose to take this course online (digital or print version), you can start and finish this course whenever you want. 4 hours of tutoring, which you schedule at your convenience, are offered to accompany you in your learning. If you wish, you can follow these tutoring hours on-site at the EGM (once you have selected your hours, please send us an email at

If you choose to take this course on-site at the EGM, classes are held on Mondays, Tuesdays, Thursdays and sometimes Fridays, from 9am to 12pm and from 1pm to 4pm, according to the announced schedule. At that moment, classes on-site are given only in French.


Online course with digital version: $610 CDN + taxes (i.e. $701.35)

The 4 hours of tutoring are included.

Online course with printed version: $685 CDN + taxes (i.e. $787.58)

The 4 hours of tutoring and shipping are included.

Classes on-site (in French): $940 CDN + taxes (i.e. $1080.77)

How to register

Online (by clicking on the “Register” button on the right), by mail or by phone at 514 844-0024. Registration for courses in French is done on the French version of the page.

Once registered, you will receive your student access code for the digital version of the courses, even if you are taking the courses in person.

If you choose to take the courses online, you will be able to request 4 hours of tutoring at your convenience. This tutoring is individual, and is provided by one of the EGM teachers. You can sign up for additional tutoring if you wish (fee extra).

Certificate program

The Advanced Gemmology course is sanctioned by two exams (one after the eleventh lesson and one after the twenty-second). These are done online.

The results are available quickly. In case of failure, a second attempt is allocated, free of charge.

A certificate is issued, and this module is credited.

Indeed, this course is part of the course for the Career Gemmologist and Coloured Gemstone Professional diploma programs. If you wish to follow these courses, the next course is Gem Identification, available online (in English, French and Spanish) or on-site (in French).

You will find all the information you need about the WGF courses and the different procedures on the Gem Academy of Canada page.
You can also consult the Frequently Asked Questions (FAQs) on the WGF website.