Tag Archives: pleochroic gems

Pleochroism vs. Color Zoning

Yesterday, I wrote about pleochroism and how this optical phenomenon is often misinterpreted as color zoning. As I mentioned, pleochroic gems show different colors when viewed from different crystal directions. So as you move the gem around, the same area … Continue reading

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Pleochroic Aquamarine

Like most colored gemstones, Aquamarine is doubly refractive, meaning light entering the crystal is split into different directions at different speeds due to differences in the atomic structure of the crystal. Rarely is double refraction visible to the naked eye, … Continue reading

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