Geography of Illinois before the dinosaurs. Galena, a lead ore, has been mined in the northwest corner of the state. The ore was processed around Peru, Illinois, where river transport was available to bring the ore to a source of coal. About six tons of coal are needed for each ton of ore. Fluorite, calcium fluoride, is the state mineral. It is mined in the southeastern portion of the state, around Metropolis. Fluorine gas is produced from fluorite. This is used in the production of uranium hexafluoride in Metropolis, Illinois for use at the gaseous diffusion plant in Paducah, Kentucky. Geodes can be
Galena, Missouri Galena, Missouri Galena is a city in Stone County, Missouri, United States. The population was 440 at the 2010 census. It is the county seat of Stone County. Galena is part of the Branson, Missouri Micropolitan Statistical Area. Galena was platted in 1852, and named for deposits of the ore galena near the original town site. An early variant name was "Jamestown". A post office has been in operation at Galena since 1853. The last public execution in the United States took place in Galena in 1937. According to the United States Census Bureau, the city has a total area