Fluorite - Bluffton Quarry, Ohio
Macro photos of translucent brown fluorite crystals up to 7mm on matrix. Microcrystals of pyrite are also visible in white light. The fluorite fluoresces bright white in LW, with a greenish phosphorescence (also shown, but from a different angle). FOV 30mm.
Lit by a pair of 365nm flashlights. Specimen is 50 x 44 x 30mm.