The Dichroscope: A Faceter’s Guide
A dichroscope can distinguish the colors of pleochroic gems. Learn how gem cutters can use this tool to choose the best faceting designs for these…
Gemstone Magnetism
Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…
Finding Twinning, Dichroism, and Strain with a Polariscope
A gemologist can conduct many different tests with a polariscope. Gemstone twinning, dichroism, and internal crystal strain are some of the properties …
What is a Polariscope?
The polariscope is one of gemology’s simplest and most useful tools. With a little practice and our three-part polariscope guide, you’ll…
Using the Refractometer
Step 3: Practical Gemology Lesson 4 Back to syllabus Gemstone identification is like detective work. You gather clues and eliminate suspects…
10X Loupe for Gemologists and Jewelers
The simple 10X loupe fits in your pocket and costs less than any other piece of gemological equipment. You’ll learn more with it than any other…
Why Do We Need Tools for Gemology?
People often ask me about gem identification. More specifically, they ask me to identify their gems. Some think I can do this simply by looking at…
Enhanced Gem Inclusions
Gem treatments can affect a stone’s value and stability. Learn how the most common procedures work and how to identify enhanced gem inclusions.…
Gemstone Photomicrography: Photographing Inclusions
Explore the amazing world of gemstone photomicrography. These tips can help you view and photograph spectacular inclusions found inside many…
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