Good specimens are stored in the Milwaukee County Public Museum. The current owners of the cave, Jean and Blaze Cummingham, the two geologists who currently own and operate the cave, could not confirm this report. Gypsum occurs as micro crystals. Gypsum is found as an alteration product of pyrite within the St. Peter Formation in the silica sand quarry near Hanover. This association is likely widespread in the state.
Gypsum occurs as micro -xls.