Calcite - Challenger Cave, Nuevo Leon, Mexico

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Normal light
Shortwave ultraviolet
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Longwave Ultraviolet
Mediumwave Ultraviolet
The calcite in the above photos appears to be small. Actually, it is
a large specimen. It measures 4 1/2" long by 3 1/2" wide by 2 1/2" thick.
Just recently added medium-wave ultraviolet photo of this calcite.
Under medium-wave UV, it gave a different response in color.

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