Clinohedrite and Willemite, Franklin, New Jersey

This classic fluorescent rock from Franklin, New Jersey, contains orange fluorescent clinohedrite, green fluorescing willemite, and black non-fluorescent franklinite. The clinohedrite and willemite fluoresce brightly under short wave UV and show phosphorescence. A similar, but much dimmer response is seen under long wave UV. This specimen measures 74 x 64 x 31 mm, and it weighs 246 grams.

Mouse over the scrolling images to see UV wavelength information.

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