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Learning Center

Gemology Tools

From the humble loupe to microscopes, spectroscopes and more. Learn about the tools of gemology here.
Gemstone Refractometer Mini-Quiz

Test your knowledge of refractometer gem analysis with this mini-quiz. You can review material on any question you miss at the end of the quiz.

How to Evaluate Diamond Symmetry

How can you evaluate diamond symmetry without an expensive proportion scope? Learn how to build an inexpensive alternative tool that will get…

Learn to Use a Polariscope (Video)

Taking?polariscope readings can be challenging. In this tutorial video, you’ll learn how to use this tool and which gems might give you anomalous…

The Spectroscope

The spectroscope is a fundamental gemological tool. Learn how to use it to identify gemstones based on their absorption of different wavelengths…

Advanced Gemology Equipment

Gemstone treatments and synthetics are becoming more sophisticated. Learn about the advanced gemology equipment that gem labs use to stay ahead…

Gemology Book Reviews: Careers

Artists, lapidaries, and gem merchants all have stories to tell. Three very different books with varied perspectives explore the lives of people…

Build Your Own Gemology Tools

Are you a hobbyist or professional gemologist facing high equipment costs? Read our IGS series of articles that can help you build your own gemology…

Product Comparison, Polariscopes

Polariscopes are one of our most useful instruments. They come in a wide variety of prices and qualities. There are a number of ways to make a polariscope.…

Product Review, Diamond Calculator

There is a new piece of software available that will be of interest to many of you. It is called the Diamond Calculator. More information available…