Phosphorescent Willemite, fluorescing in bright green bands with a color that persists after the UV light source is removed, across between black Franklinite and red Zincite, neither of which are UV reactive, Photographed under under 254 Shortwave UV light. Collected from the then-active, legendary Franklin Mine in Franklin NJ, one of the most unique geological assemblages on the planet. 4.5" x 2.5" x 3.5", 1.6 lbs.