Fluorite

As most may know by now, bright lustrous multi-colored fluorites from Illinois have become hard to find and extremely valuable, ever since Ross Lilly sold his best-of-Cave-In-Rock distrct fluorite collection. This one is blue with purple phantoms in each cube. The surface is glassy and there's no visible damage. It was purchased from Stan Esbenshade in 1994 at the Tucson show, and was collected ealrier that year (making it one of the last to be found before the mines closed). 

This is a top quality cave-in-rock fluorite miniature.