Fluorescent Minerals
I recently bought this piece at a rock shop while traveling - a nice example of green cubic fluorite crystals from the Rogerley Mine in England. 3.5"x3"x2.5" This piece was being sold as a white light specimen, and was a pretty good deal.
The fluorite is fluorescent under all wavelengths, pictured here with short wave UV.
The fluorescent response under long wave UV is incredibly bright.
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