Rogerley Fluorite - England
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Rogerley fluorite is a famous type of fluorite from the Rogerley Mine in County Durham, England. These pieces set the bar for other fluorites on the market, they are simply some of the nicest out there. Under visible light, a nice specimen will contain gemmy emerald green fluorite crystal cubes.
Their fluorescence is so intense and bright, that even when exposed to sunlight, the UV from the sunlight will cause a noticeable color change to blue in the green fluorite crystals. We call this phenomenon, Daylight Fluorescence. It’s very cool to see in person.
Willemite, Calcite, Fluorite from the Garpenberg Mine in Sweden
The Garpenberg mine is located in Bergslagen, a very old mining area in the southern part of Sweden.
The mine is very active today and is one of Europe's most progressive underground mining operations. Collecting is not possible, and the few specimens that reach collector's hands are highly prized. The mineralogy is quite similar to that of Franklin NJ.