Willemite is completely absent from the Calcite, which also has a brighter color, on the other side of the ribbon of Franklinite and Zincite that divides this highly shortwave ultraviolet fluorescent piece collected from the legendary Franklin Mine in Franklin New Jersey while it was active (pre 1964). Photographed under under 254 Shortwave UV light. 4.5" x 2.5" x 2.5", 1 lb.