Illinois' state mineral is Fluorspar (also known as Fluorite).
It was chosen as the state mineral in 1977 because of its historical significance, as it was once a major mining product in the state, and for its beauty and variety of colors. Illinois is also one of the world's leading producers of fluorspar.
However, it is important to note that "Fluorspar" is a more precise term for the mineral. The name "Fluorite" is a broader term that refers to the chemical compound calcium fluoride, and can include other minerals like Yttrofluorite.
