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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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Dumortierite, Alpine, California

17.6.2017

Purple dumortierite in a light colored quartz groundmass, from the Dehesa Dumortierite deposit, Alpine, Laguna Mts, San Diego Co., California. The small, needle-like dumortierite crystals show a crisp blue/white fluorescent response under short wave UV.  Dumortierite is a fibrous aluminium boro-silicate mineral.  The size of this specimen is 44 x 29 x 18 mm.

Photo on left was taken under short wave UV (254nm).  Visible light photo on right. 

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