Saturday, April 29, 2017

A selection of synthetic gem material. Check the Credits page to find out what these are. Photo:

Advanced Courses

Pre-registration is required. Classes that have not filled by 7 days prior to the start date are subject to cancellation.
All courses are offered at the CGA classroom in Toronto, Ontario.

  Code   Course Duration Price
  SYN Sophisticated Synthetics and Gemstone Enhancements 5 hours $125
  PDG Canadian Diamond Grading Course 5 days $945
  JAP Master Valuer Jewellery Appraisal Program 90 Hours $5,400
  CGV Coloured Gemstone Grading and Valuation 3 days $595
  PEL Pre-exam Lab 5 days $845/$675


Sophisticated Synthetics and Gemstone Enhancements

 Bring your knowledge of the important gemstones up to date! Emeralds, sapphires, rubies and diamonds are valuable gems which are frequently enhanced, and for which many simulants and synthetic counterparts exist.
The primary focus of these workshops is on the nature and occurrence of inclusions within the various "sophisticated" synthetics, and the detection of new methods of enhancement. Participants will have a chance to practice the various techniques and tips provided for distinguishing natural gems from synthetics and for detecting enhancements using gemmological instruments.

There are no prerequisites for this workshop, however a gemmological background or trade experience would be an asset.

  • Saturdays, 10 am to 3 pm
  • Fee: $125.00 per session


Canadian Diamond Grading Course

An intensive, hands-on course which will provide knowledge and skill in the grading of colourless, round brilliant cut diamonds. Please note: this course focuses on the diamond grading process, not the identification of diamond and/or its simulants. All necessary major equipment is provided, but students should bring their own pocket instruments (which are available at reasonable cost on-site). Required course textbook may purchased separately. Class size is limited to a maximum of 8 students.

  1. None. For individuals without any gemmological or trade background it is highly recommended that they first take the Talking Diamonds and Diamond and Diamond Imitation course.
  • diamonds: their formation and physical properties
  • instrumentation for grading
  • packaging/handling of loose diamonds
  • colour grading
  • cut (make) grading
  • weighing diamonds; including nomenclature, and tolerances
  • estimation of weight from dimensions
  • grading of single cut melee
  • influence of colour, clarity, cut and weight on pricing.
  • Fee: $945.00 (textbook is an additional $125.00); limited enrollment
  • Summer course: Mon July 10 to Fri July 14, 2017  hours 9 am to 5 pm


Master Valuer Jewellery Appraisal Program

The CGA is proud to announce that The Master Valuer Jewellery Appraisal Course is now being offered in Toronto.  This 90 hour in class program is currently being offered over seven weekends. The Master Valuer Course is a comprehensive appraisal course which includes learning the approved methodology for writing professional appraisals of all types including insurance, estate, donation and probate.  Course begins August 6 and finishes November 13, 2016 Please see our events calendar to view the weekends for this course.

The Master Valuer designation is recognized by the Canadian Jewelers Association as fulfilling their appraisal educational requirements to enable their members to be awarded the Accredited Appraiser (AAP) designation.


  • a recognized gemmological credential (e.g., FCGmA, FGA, FGAA, GG, etc.) or currently be enrolled in a gemmological program.


  • Fee: $5400  (2 text books are additional cost). liimited enrollment
  • Saturdays and Sundays  9:30 am to 5 pm
  • 90 hours total,  7 weekends scheduled over 14 weeks                                                              
  • Summer session: June 10&11, 2017, June 24 &25, 2017, July 8 & 9, 2017, August 19-20, 2017, August 26 & 27, 2017, Sept 9 &10,2017 and October7-8,  2017
  • Evening only--Wednesday evening (when no monthly meeting) 6-9 pm over 30 weeks  NEW   
  • Next session : September 6, 2017 ending June 13, 2018
  • Accelerated program 3 weeks of 30 hours per week. NEW
  • Next session: March 27, 2017 until April 13, 2017
  • Due to Good Friday there will be 2 weeks of 32.5hours and one of 25 hours in order to complete the 90 hour total in 3 weeks.
  • Summer session: July 17, 2017 until August 4, 2017       


Coloured Gemstone Grading and Valuation

 This three-day workshop will benefit gem trade professionals, gemmology students and enthusiasts alike.
Students will learn the skills to accurately grade and value coloured gemstones. Emphasis on hands-on practice with a variety of gems of different quality will provide students with the knowledge to become confident buyers and sellers in the rapidly growing coloured stone market.
  • Colour basics
  • Munsell colour system
  • Gem Dialogue colour description system
  • GIA grading system
  • Correct grading practice
  • Valuation principles
  • Impact of treatment on value
  • The gem quality curve
  • Marketplace pricing factors
  • The Guide wholesale pricing index
Instructor: Helmut Koenig
Course fee: $595 including taxes.
Note: The Coloured Gemstone Grading and Valuation Course is owned and offered by Helmut Koenig. Potential students should contact Mr. Koenig at 416-317-2480 or This email address is being protected from spambots. You need JavaScript enabled to view it. for more information or to register for this 3 day course.
Next session: August 11 - 13, 2017

Pre-Exam Lab Course

An optional 5-day Pre-Examination Lab Course is offered in Toronto prior to each examination session, based on demand. This lab session in gem identification and instrument use is primarily intended for CGA registered students who wish extra practice in preparation for the professional-level practical examination, but other qualified individuals may be accepted.

The focus of the week is to give students as many gemstones as possible for viewing and identification, to become comfortable with the instruments and to devote extra time and support to areas of weak understanding. A qualified gemmologist with teaching experience will supervise.

Schedule: 5-days, 9:00 am - 4:00 pm
Next Session: May 29 to June 2, 2017 
CGA student $675.00/non-student $845.00

Registration forms may be downloaded from the Short Courses section of the Course Forms page.

The professional development classes described on this page do not require approval under the Private Career Colleges Act, 2005.

Class Dates

Professional Courses

Gemmology Accelerated Program
Sept 5 - Dec 21, 2017 

Jewellery Associate-Gemmology Specialist
Sept 19, 2017 - May 15, 2018

Gemmology Program
Sept 18, 2017 - May 17, 2018

Advanced Topics

Diamond Grading
July 10-14, 2017

Master Valuer Jewellery Appraisal Program
June 10, 2017- weekend format start

September 6, 2017-one evening a week start (NEW)

July 17, 2017 accelerated class start (NEW)

Coloured Stone Grading and Valuation
August 11 - 13, 2017

Pre-Exam Lab

May 29 - June 2, 2017

General Interest

Gem Appreciation
Aug 18, 2017 - Toronto
TBA-Calgary Location (NEW)

Intro to Gem ID
April 29-30, 2017 Toronto
Aug 28-29, 2017 - Toronto 

Talking Diamonds
May 13, 2017 - Toronto (change of date)
TBA - Calgary Location (NEW)

Diamond and Diamond Imitations
June 3-4, 2017


Open House Dates

Andamooka opal pic

Want to know more? Drop by the classroom at 55 Queen St East, meet our instructors and learn more about our courses and gemmology in general or please phone to make an appointment.

Next Open House

  • Wednesday May 17, 2017  5:30 pm to 6:45 pm