Step 3: Practical Gemology
A dichroscope is one of the most useful instruments a gemologist can have. Its primary purpose is to determine the pleochroism of a gem. This can be a valuable piece of information in determining a gem’s identity. While you can observe pleochroism with a polariscope, it is much easier to see with the dichroscope.
The dichroscope also helps by confirming other test results. Occasionally a refractometer or polariscope will give ambiguous …
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