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lisacog:

pearl-nautilus:

Cubic, gemmy crystals of fluorite on matrix from world famous locality - Rogerly Mine. Medium luster. Fluorite cubes are well coloured - green in artificial light with a strong blue daylight fluorescence, and an even stronger purple-white fluorescence under long wave UV light. This amazing fluorite crystals change colour in different lights - in natural light they are blue, in artificial light they are green.
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"Cubic, gemmy crystals". I’ll have to try that out the next time I annoy an employee at KayJewelers whilst getting Auntie Annie pretzel fingerprints all over the glass.
Both blue and green? I’ll take a small cube, please.

lisacog:

pearl-nautilus:

Cubic, gemmy crystals of fluorite on matrix from world famous locality - Rogerly Mine. Medium luster. Fluorite cubes are well coloured - green in artificial light with a strong blue daylight fluorescence, and an even stronger purple-white fluorescence under long wave UV light. This amazing fluorite crystals change colour in different lights - in natural light they are blue, in artificial light they are green.

source:

 

"Cubic, gemmy crystals". I’ll have to try that out the next time I annoy an employee at KayJewelers whilst getting Auntie Annie pretzel fingerprints all over the glass.

Both blue and green? I’ll take a small cube, please.