Coloured Stone Grading

Coloured gemstones are more popular than ever and it is important that gem dealers, appraisers, and jewellers understand the criteria used to determine the quality and value of coloured gemstones.

During this two-day practical workshop participants will learn how to assess the quality of different coloured gemstones based on: colour, cut quality, and clarity factors. Understanding the impact these criteria have on the value of coloured gems is essential for anyone involved in the gem and jewellery industry.

Who Should Take This Course

This course is designed to meet the needs of gemmologists, gemmology students, and professionals (appraisers, jewellers, and gem dealers) who are looking to improve their ability to grade and accurately communicate the colour and quality of coloured gems.

Prerequisites: Gemmology 1 , Gemmology 2, and Gemmology 3 or equivalent industry experience.

What You’ll Learn

EGM’s vast collection allows students to see a broad selection of different quality grades for most gem varieties. Students will work with many different gems including: ruby, sapphire, emerald, topaz, tourmaline, peridot, tanzanite, and many more.

What You’ll Receive

All students receive detailed course notes that help them assimilate the information and will serve as a valuable reference for their future work with gemstones.
Students who successfully complete the course and pass the practical exam will receive a letter of completion from EGM.


This course is offered in both English and French and takes place over a two-day period 9am to 5pm each day.

How to Register

You can register online, by phone at 514-844-0024, or by mail. Be sure to indicate your language of choice when enrolling for the course.