Fluorescent mineral display at the 2019 Dallas Gem and Mineral Society Annual show in November. 

Fluorescent mineral display at the 2019 Dallas Gem and Mineral Society Annual show in November. 
Fluorescent mineral display at the 2019 Dallas Gem and Mineral Society Annual show in November. 

Fluorescent mineral display at the 2019 Dallas Gem and Mineral Society Annual show in November.  Illuminated by long wave ultraviolet on the left and short wave ultraviolet on the right.

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Sun, 29 Mar 2020 09:13:18