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Large Fluorite Sphere
Fluorite Sphere with Phosphorescent Coating

A sphere with unusual phosphorescence is seen in the Carlsbad laboratory.

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Confusing, Triangular Inclusions in an Art Deco-Style Pin
Spring 1991 G&G Lab Notes

This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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