Gypsum under longwave UV Light



Gypsum (selenite), franklinite and calcite from the Sterling Hill Mine, NJ under longwave UV light. The gypsum fluoresces white to light blue, calcite deep red, and the franklinite is non-fluorescent. 3 3/4" x 1 1/2". From the collection of, and photo by WP.


Gypsum (selenite), franklinite and calcite from the Sterling Hill Mine, NJ under longwave UV Light