Step 3: Practical Gemology
The polariscope is one of gemology’s simplest and most useful tools. With a little practice and our three-part polariscope guide, you’ll soon be able to conduct some fundamental gem identification tests. You can test gemstone refraction to determine if a gem is singly or doubly refractive, learn the optic figure and sign of a doubly refractive gem, and see gemstone twinning, dichroic colors, and strain.
Build Your Own Polariscope
A polariscope …
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