Cave-in-Rock

Hardin County, Illinois, USA

Cave-in-Rock is a state park and town in Hardin County, all named, rather unsurprisingly, after a cave in a rock.

The area is known for phenomenal purple Fluorites, some of the best in the world.

There were many mines around the area, primarily exploiting galena and fluorspar. The best known mines in the area for mineral specimens were the Minerva mine, the Denton mine, and the Anna Belle Lee mine, all of which are now closed.

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