Fluorite
Illinois doesn't have a state rock, but the state mineral is fluorite.
The closest to a stone I could get is the Illinois State Mineral, which is Fluorite.
Calcium flouride (Flourite) is the state mineral. Limestone is the state stone.
Fluorite was chosen as the state mineral of Illinois because the state has historically been a top producer of fluorite in the United States. The mineral is known for its vibrant colors and is commonly found in Illinois, making it a symbol of the state's mining industry and geologic heritage. Additionally, fluorite has industrial applications in areas like steel production and optics, further contributing to its significance.
Fluorite (mostly abandoned), quartz (sandstone), calcite (limestone), clay minerals, and galena (also mostly abandoned). Mineral mining is not what it used to be in Illinois. Fluorite mines which once flourished in southern Illinois are now closed due to overseas competition. Galena was once mined in northern Illinois, but no longer.
Illinois is a state.
The white-tailed deer is official state animal of Illinois. The northern cardinal is official state bird of Illinois. The monarch butterfly is official state butterfly of Illinois. "State sovereignty, national union" is the official state motto of Illinois. Land of Lincoln is official state nickname of Illinois. Pumpkin pie is the official state pie of Illinois. "Illinois" is the title of the official state song of Illinois. The white oak is official state tree of Illinois.
"Illinois" is the title of the official state song of Illinois.
Goldrush apple is the official state fruit of Illinois.
"Illinois" is the title of the official state song of Illinois.
fluorite
State of Illinois