Sphalerite, microcline feldspar, minor willemite from the Buckwheat dump Franklin, NJ under longwave UV light. The sphalerite fluoresces dark blue and light purple, microcline feldspar weak red, the willemite is not fluorescing. 1 3/4" x 1 1/2". Photo by WP.
Franklin-Ogdensburg Mineralogical Society Inc - FOMS, Franklin, NJ |
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