Minerals & Gemstone 480x104
Minerals & Gemstone 480x104
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Glossary of Terms
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Tenebrescence
Unique optical property on certain minerals where they change color upon exposure to sunlight and ultraviolet light. The best example of tenebrescence is is exhibited in the mineral Hackmanite, where its color will be deeper after exposure to ultraviolet light and then eventually fade.



Hackmanite Exhibiting Tenebrescence



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