Strange Fluorescent Aragonite Cave Formation, Shoals, Indiana

This is a very peculiar and interesting specimen of aragonite dripstone, collected in an unnamed cave in a limestone quarry in Shoals, Indiana.  This brain-like, convoluted formation of off-white aragonite fluoresces blue/white under all UV wavelengths, with blue phosphorescence after short wave and green phosphorescence after long wave UV.  The size of this unique specimen is 38 x 34 x 30 mm.


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