World Gem Foundation
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Advanced Gemmology Course


Level Two: Basic Gemmology or Equivalent



Course Objective

In this course you will learn about imitation gemstones, the different methods used to manufacture lab-created gemstones, how to distinguish them from their natural counterparts, and how to detect the various treatments used to improve the appearance and/or value of gemstones.

Topics Covered Include

Imitation and composite gemstones, methods used to manufacture lab-created gemstones including Verneuil, Czochralski, Flux Melt, Hydrothermal, Skull Crucible, Zone Melt, Horizontally Oriented Crystallization, HPHT, CVD, Detonation, Ultrasonic Cavitation, Sublimation Method, and Modified Stober Method, their unique identifying features, treatments and enhancements including heat treatment, surface and sub-surface diffusion, lead glass fracture filling, flux assisted partial fissure healing, glass fracture filling, cobalt doped glass filled sapphires, clarity enhanced diamonds, HPHT, quench-crackling, surface modifications, coatings and foil backs, laser drilling, irradiation, and advanced gem testing techniques.

Tests and Examinations

This course includes two online tests, one after lesson eleven and the other after lesson twenty-two.

Course Credits

Program and
							Course Flow Chart

Upon the successful completion of this course you will receive course credits towards both the Career Gemmologist Diploma and Coloured Gemstone Professional Diploma Programs.

Long Distance Learning

This course is available for long distance learning. You can register at any time and study at your own pace. There are no time restrictions.

This course includes four (4) hours of online tutoring from one of our instructors. Once you have registered, you will receive an email detailing how you can choose your tutoring hours. You can also request additional tutoring hours if necessary.

Cost (Digital): $ 450 (USD) / € 400 / 360 GBP

Printed Version

Our courses are also available in print. Please contact us for more information.