Official State Rocks, Gems and Minerals http://www.netstate.com/states/tables/state_rocks_all.htm Official State Rocks, Minerals, Gems, Etc. http://www.netstate.com/states/tables/state_rocks_all.htm http://www.netstate.com/states/tables/state_rocks_all.htm Official State Rocks, Gems and Minerals South Dakota’s state minera