Benstonite With Fluorite and Sphalerite
Minerva #1 Mine, Cave in Rock, Hardin Co., Illinois, USA
Small Cabinet, 6.3 x 4.0 x 3.5 cm
Ex. Martin Zinn
Named after Orlando J. Benston, an ore dressing metallurgist with the University of Illinois, this is a very rare and COMPLEX carbonate species that was found only sporadically, I nsmall pockets, in the odler days of this mine. This is a niec specimen showing the paragenesis of the mineral, on altering fluorite matrix.