Uranocircite
description: 1 1/2" across Ex collection of Dr Steve Neely. I acquired it from Robert Lavinsky after the Denver Show in 2009. Illustrated in "Encyclopedia of Minerals - Edition 2". Although relatively small for the species, it is one of the finest from Brazil that I have seen. It is of pegmatitic origin and this ads interest to it. Autunite is a uranium bearing phosphate. It glows fluorescent green under long, intermediate and short wave ultraviolet light and this spectacular property impresses even those oblivious to mineral specimens and the hobby of collecting them. :)
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