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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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Barite, Cave-In-Rock, Illinois

20.6.2017

Cluster of white, bladed, barite crystals without matrix, with needle-like, off-white calcite crystals occurring between the central barite blades on one side of the specimen.  It was collected from one of the many fluorspar (fluorite) mines in the Cave-In-Rock area of southern Illinois.  This barite shows exceptionally bright white to white/blue fluorescence with bright phosphorescence under all UV wavelengths.  The size of this specimen is 67 x 57 x 37 mm, and it weighs 95 grams.

 Photograph taken under short wave UV (254nm).  The barite fluoresces blue/white and the calcite cream/tan.  See the following image gallery for photographs taken under other wavelengths:

 

 

 Click on the above images for a larger view and UV wavelength information.

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