Datolite crystals, margarosanite and hancockite with minor roeblingite and clinohedrite from Franklin, NJ under shortwave UV light. The datolite fluoresces light blue, margarosanite sky blue (under the datolite), roeblingite red and the clinohedrite orange, the hancockite is non-fluorescent. From the collection of, and photo by Robert A. Boymistruk.
Franklin-Ogdensburg Mineralogical Society Inc - FOMS, Franklin, NJ |
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