How do professionals approach gem identification when faced with similar looking stones?  Having discovered the astonishing array of beautiful gems in the previous courses, and learning how to systematically test and analyze them in Gemmology 3, students now hone their gem identification skills by differentiating between stones that look the same.

Who Should Take This Course

Jewellery professionals and gem lovers alike will benefit from the extensive hands-on gem observation and testing offered in Gemmology 4.

Prerequisites: Gemmology 3.

What You’ll Learn

Students will apply their gem identification skills when faced with gems of similar colour and appearances.  In EGM’s well-equipped classroom, students will observe and test carefully selected specimens from the vast collection of gemstones.  The course focuses on a series of gemstones grouped by colour, and students must differentiate and identify each individual gem material.

What You’ll Receive

All students will receive detailed course notes with a list of gemstone properties and identifying features that will serve as a valuable reference for the future.  Students who successfully complete the course and pass the final exam will receive an attestation from EGM.

Languages and Schedule

This course is offered in English (on Thursdays) and French (on Mondays). Classes are from 6:00 p.m. to 9:00 p.m. one evening a week for fifteen weeks. See course calendar for dates.

Registration and Payment

Payment is considered as registration. Payment can be made on this page, by debit or credit card by calling the school at (514) 844-0024, by Interac on the email

The price of the course is $650 before taxes, and is subject to applicable taxes: 5% federal tax (GST) and 9.975% provincial tax (QST). 

The final price is therefore $747.34.

Certificate Program

At the end of the workshop and if you have passed the evaluation test, you will receive a certificate from the EGM.

For those who want to further pursue their gemmological training, EGM offers a Certificate program. Students who complete Gemmology 1, 2, 3, and 4, as well as the Diamond Grading and Pearl Grading Workshops can sit the EGM Certificate exams. Students who successfully pass the Certificate theory and practical exams will receive an EGM Certificate in Gemmology.