Hardystonite, Calcite & Willemite with Franklinite. Franklin Mine, Franklin, NJ. A fantastic old mine combination specimen from a legendary, long closed, location. Hardystonite was found in abundance in the Franklin Mine, but not even a trace at the Sterling Hill Mine, a persistent mystery. Photographed under 254 nm SW UV. 3" x 1.5" x 2.5", 8 oz.