Talc under longwave UV Light



Talc, sphalerite, franklinite and willemite from the Sterling Hill Mine, Ogdensburg, NJ under longwave UV light. The talc fluoresces weak dull yellow, sphalerite purple, orange and red, the franklinite and willemite are non-fluorescent. 4 1/2" x 2 1/4". From the collection of JVF, photo by WP.


Talc, sphalerite, franklinite and willemite from the Sterling Hill Mine, Ogdensburg, NJ under longwave UV Light