Sphalerite variety cleiophane, willemite, calcite, franklinite, and minor zincite from Franklin, NJ under longwave UV light. The sphalerite fluoresces light blue, willemite weak dark green, the calcite, zincite and franklinite are non-fluorescent. 3 1/4" x 2 1/2". Photo by WP.
Franklin-Ogdensburg Mineralogical Society Inc - FOMS, Franklin, NJ |
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