Root beer-colored fluorite cubes with white translucent blades of celestine, from the Stoneco White Rock Quarry, Clay Center, Ottawa Co., Ohio. Fluorite specimens from Clay Center, Ohio, are notable for their bright white, zoned fluorescence under long wave UV. Also impressive under short wave UV, the fluorite shows a cooler white, and slightly dimmer fluorescent response. This material is also phosphorescent under both wavelengths, showing a white glow after short wave UV, and green after long wave. The fluorescence in the Clay Center fluorites is likely due to the presence of an organic activator. The size of this specimen is 65 x 50 x 28 mm.
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