• Learning Center

    Gemology Tools

    From the humble loupe to microscopes, spectroscopes and more. Learn about the tools of gemology here.
    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…

    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.

    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…

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