#long wave ultraviole
Fluorite from the Ojuela Mine, Mapimi, Mexico shown under long wave ultraviolet (black light) and white light. The main crystal is 2.2 cm along the long edge.
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Fluorite from the Ojuela Mine, Mapimi, Mexico shown under long wave ultraviolet (black light) and white light. The main crystal is 2.2 cm along the long edge.