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Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.

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Fluorescent And Phosphorescent Thernardite from Soda Lake, California


Thernardite is an anhydrous sodium sulfate mineral which occurs in arid evaporative environments such as Soda Lake. It fluoresces in a ghostly blue fashion and is best under shortwave ultraviolet light. It phosphoresces blue as well. Only shortwave ultraviolet pictures are posted in addition to a daylight one. Long and Midwave fluorescence are similar but not as vivid as that of shortwave. ISO-100 f/11 1.3 second exposure.  10 ounces 3 x 2 1/4 x 2 inches.



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