Learning Center

Gemology Tools

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

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

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…

The Spectroscope in Gemology

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

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…

Spectroscope Instructions

The spectroscope is one of gemology’s principal tools. Our basic spectroscope instructions will teach you how to operate and calibrate this…

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…

The Dichroscope

The dichroscope is one of the most useful instruments a gemologist can have. Its primary purpose is to determine the pleochroism of a gem.