Rogerley Fluorite - Daylight Fluorescent Fluorite From the Rogerley mine!!!
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Stunning, Rogerley Fluorite!
From the website https://www.naturesrainbows.com:
Daylight fluorescence is a phenomenon where some fluorescent minerals show a noticeable color change under sunlight, due to the UV component of the sunlight causing a bright fluorescent response seen in daylight. Notable examples of minerals that exhibit daylight fluorescence include some colorless hyalite opals which appear green under sunlight, and certain willemite specimens from Franklin, New Jersey, which also show green daylight fluorescence. Probably the most notable example of daylight fluorescence can be seen in the beautiful green fluorite specimens collected from the Rogerley Mine, Weardale, England. ( The mine closed in 2016)