This is a mixed specimen containing calcite, fluorite, sphalerite and likely other minerals. It was self-collected in 2015 at the tailings pile, Rosiclare Lead and Fluorspar Mining Co., Rosiclare, Illinois. This piece shows a similar fluorescent response under SW, MW and LW UV- the fluorite is yellow, calcite pink/orange and also blue/white, and sphalerite mustard yellow/orange. There is also an unknown mineral that shows a blue phosphorescent response following exposure to SW UV. 74.9 x 45.4 x 38.6 mm, 176 gms.