Minnesota

 

Geological State Symbols Across America           Geology of the National Parks Through Pictures


Minnesota State Geological Symbols
Type
Symbol
Year Established
State Gemstone
Lake Superior Agate
1969

 

State Gemstone: Lake Superior Agate


 

References

https://statesymbolsusa.org/states/united-states/minnesota


Geology of Minnesota's National Parks

Through Pictures

(at least the one's I have been to)