Minerva No. 1 Mine, Cave-in-Rock, Hardin Co., Illinois, USA
A nice example of the highly sought after blue-purple fluorite from Southern Illinois. This one has a purple core with a thicker aqua blue layer, and a final thin, outermost layer of purple. With even minor backlighting, the color is considerably bluer than shown in the pictures (for some reason the camera focused on the purple). There is minor edge wear, and the crystal is mostly complete all around except for in one spot.