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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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Red Fluorescent Barite, Custer County, Colorado


These barite specimens, collected from an abandoned barite mine in Custer County, Colorado, show an unusual multi-wavelength red to orange fluorescent response under all UV wavelengths.  Most fluorescent barite responds to UV with pale white, blue/white, or cream/white fluorescence, so these show atypical fluorescence.

The image gallery above shows an interesting specimen consisting of brecciated clasts of light tan baryte in a dark brown matrix of unknown composition.  The baryte clasts show a beautiful orange to red fluorescent response under UV, brightest under short wave.  This piece measures 65 x 46 x 28 mm.  Shown under short wave UV (upper left), mid wave UV (upper right), long wave UV (lower left), visible light (lower right).  Click on each individual image for a larger view.


Another barite specimen from the same location.  This piece shows the brightest response under mid wave UV.  This specimen measures 56 x 42 x 29 mm.  Shown under short wave UV (upper left), mid wave UV (upper right), long wave UV (lower left), visible light (lower right).  Click on each individual image for a larger view.

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