Calcite dotted with crystals of non-fluorescent black Franklinite and large grain crystals of Red Willemite which glow bright green under 254 NM SW/UV. Some of the WIllemite is nicely phosporescent. Collected from the then-active, legendary Franklin Mine in Franklin NJ, one of the most unique geological assemblages on the planet. 3" x 1.5" x 2", 9.7 oz.