Learn to Use a Dichroscope (Video)
Not sure if your gem is pleochroic? This tutorial video will teach you how to use the dichroscope to determine pleochroism.
By Kyrylo Gubariev, Graduate Gemologist (GG, AJP), Addison Rice, updated on
Determining if a gem shows pleochroism can help you identify it. This tutorial video will teach you how to use the dichroscope to view dichroic and trichroic colors.
Premium Content - Membership Required - Learn More
Related Articles
Using a Reticle: A Guide for Gemologists
When combined with optical instruments, a reticle can take fine measurements. Learn how gemologists use this tool for measuring lengths...
Read More
What Happened to the GIA GemSet Color and Hue Wheel?
The GIA GemSet offered plastic color masters for color grading gems. It's no longer in production. Software alternatives exist but...
Read More
Polariscope Guide, Part 3: Testing for Gemstone Twinning, Dichroism, and Crystal Strain
You can use a polariscope to observe gemstone twinning, dichroism, and crystal strain. Test your ability to identify these and...
Read More
Gemology Book Reviews: Careers
Learn how varied gemology careers can be. Our gemology book reviews highlight three different approaches — as art, science, and...
Read More
Latest Articles
Milarite Value, Price, and Jewelry Information
Very rare milarite crystals can occur in green and yellow colors. Transparent material can yield small but pleasant looking faceted...
Read More
Appraising Pearls: How to Grade Pearls
Novice gemologists and jewelers may find appraising pearls difficult. Our guide will show you how to appraise and grade different...
Read More
Agate Buying Guide
Decorative, patterned forms of agate are excellent natural gems. Learn more about agate's mesmerizing patterns in our agate buying guide....
Read More
Carving Techniques for Handling Inclusions in Transparent Gems
Inclusions don't have to result in a loss of mass or value when cutting transparent gems. Learn how to manage...
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
