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Fluorescent/Phosphorescent Fluorite on Calcite, Pint's Quarry, Raymond, Iowa

Amber-colored, cubic fluorite crystals on a bed of scalenohedral calcite, on limestone matrix, from Pint's Quarry, Raymond, Black Hawk Co., Iowa. This specimen shows a similar fluorescent response under all UV wavelengths- the fluorite cubes fluoresce bright off-white with bright and lasting phosphorescence. The calcite fluoresces a dim blue/purple, with zones of blue phosphorescence following short wave UV. The limestone fluoresces a soft tan color. This specimen shows the brightest response under short wave UV. The dimensions are 9.0 x 8.3 5.0 cm, and it weighs 388 grams.

Pint’s Quarry was a former dolomite/limestone quarry with workings more than 100 feet deep. Closed in the late 1990s, Pint’s Quarry is now filled with water, and collecting is now prohibited.

Click on the thumbnail images above for wavelength information.

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