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510012186

Glowing minerals. A number of different minerals appear to glow in the dark when they are energized by ultraviolet light, invisible to our eyes. They release this energy as light in a part of the spectrum we can see. This phenomenon is known as fluorescence.

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510012186 (1).jpg
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Irish Photo Archive
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Glowing minerals.  A number of different minerals appear to glow in the dark when they are energized by ultraviolet light, invisible to our eyes.  They release this energy as light in a part of the spectrum we can see.  This phenomenon is known as fluorescence.