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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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Popcorn Barite, Linwood Mine, Buffalo, Iowa

18.8.2016

A plate of off-white barite crystals on a limestone matrix, from the Linwood Mine, Buffalo, Scott Co., Iowa.  This particular material is known locally as "Popcorn Barite," and is brightly fluorescent and phosphorescent.  Under short wave UV (254nm) the barite shows a bright blue/white fluorescent response with blue/green phosphorescence.  The barite shows a similar fluorescent response under long wave UV (365nm) with dim green phosphorescence.  Approximate dimensions are 14 x 10 x 5 cm.

 

 

 

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