Benstonite was one of the more rare species found in the Illinois fluorspar district. Specimens were exceptionally uncommon, and tended to go back aways, even before the mines closed in the late 1990s. This piece features a doubly-terminated benstonite cluster of 5 cm (just over two inches) perched smartly and well exposed on contrasting sphalerite matrix. A very aesthetic specimen, which is rare indeed for this material! It displays superbly and should be considered a competition level specimen. 7.8 x 4.9 x 4 cm