Professional Certifications

Professional Gemologist Certification Course

Intermediate
6 UNITS
95 LESSONS

The International Gem Society (IGS) was one of the first online schools of gemology to serve a global audience. Our goal is to provide a flexible and affordable education in gemology. IGS's founder, Donald Clark, CSM IMG, created a robust testing process to ensure that those with IGS certification would stand out in the crowd. IGS continues to use the testing process created by Donald Clark to ensure continuity and rigor.

Start this course for $400 (plus the cost of Pro Membership)

About this course

Intermediate
6 UNITS
95 LESSONS

Consumers

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Gem Hobbyists

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Gem Professionals

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Why take this course?

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This course offers…

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Course Roadmap

Read the Lessons

Written Exams

Practical Exam

Earn Certificate

Units & Lessons

Unit 1:Advanced Gem Information

Once you understand gemstone properties, you’ll learn to distinguish natural from synthetic gems and to identify unique gemstones. Our Gem Listings are written in simple language and are intended for the novice. You can also consult our handy reference charts. This is the last step in gem identification.

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Unit 2:Advanced Gemology

This is the most technical section of our gemology course. Although this information is preliminary to the Practical Gemology articles, don’t hesitate to jump to the lessons on using the instruments in Step III. Gaining experience with gemological tools will help you with these advanced lessons.

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Unit 3:An Introduction to Gemology

Start by studying the following articles. These will introduce you to the fundamentals and terminology of the science of gemology.

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Unit 4:Appraising

You’ve learned how gems differ from one another, how to identify them, and what properties determine their value. Now you’ll apply what you’ve learned. Actual jewelry appraisal is fairly simple after mastering gem identification and grading.

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Unit 5:Gem Grading

So far, you’ve been studying gem identification. Now you’re ready to learn gemstone grading. The information in these articles is critical for properly describing and valuing gems. You’ll start with general information useful for grading all gemstones. Next, you’ll learn how to grade colored gemstones. Finally, diamonds and opals have special qualities that require their own grading procedures.

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Unit 6:Practical Gemology

Next, we recommend some articles of a practical nature. They focus on how to use gem identification instruments and conduct tests. These tools and tests take time to master. Take one instrument or procedure at a time and master it before moving on to the next one.

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Frequently Asked Questions

What tools I will need

Tool	Vendors	Estimated Price
Microscope	GEMORO® Elite 1030 Microscope	$430.00
Loupe	10X Gesswein® 20.5mm Hex Triplet Loupes - Black	$21.95

Start this Course Today

Become well-versed in the terminology of gemstones, the properties of gems, how they are valued, and how to distinguish one gem from another.

Professional Membership

Gain access to all that IGS has to offer plus the ability to take our 2 certification courses for a fee of $400 each.

More about membership

30-day money back guarantee

We believe that joining IGS will save you time, money and heartache on your gemstone education and purchases. Our community of fellow enthusiasts and professionals wholeheartedly agree, which is why we are able to confidently extend a full 30-day money back guarantee on your membership. We’ll also refund your purchase of the Professional Gemologist course or Diamond Specialist course within 7 days of purchase. Mini-courses are non-refundable.