Fluorite - Cave-In-Rock Mine, Cave-In-Rock, Cave-in-Rock Sub-District, Illinois - Kentucky Fluorspar District, Hardin Co., Illinois, USA
19th Jun 2015 15:03 UTCJamison K. Brizendine 🌟 Expert
This specimen is listed twice with two different Cave-In-Rock Mines:
The Cave-In-Rock Mine was one of the oldest mines in the district and closed in the 1930s early 1940s, but pillar robbing did occur here in the early 1980s. Documented specimens from this mine are very rare. Fluorites from this locality occurred at the Sub-Rosiclare Level and were purple in color. I don’t think blue fluorite was ever found at this locality, but I could be mistaken….
The Minerva #1 Mine/Ozark-Mahoning #1 Mine, on the other hand was active for a longer period of time from the 1940s to 1976 as the Minerva #1 and then from 1989-1996 as the Ozark-Mahoning #1. Blue fluorite from this locality occurred at the Rosiclare Level…
I believe this to be a Minerva #1 Mine, Rosiclare Level specimen and not a Cave-In-Rock Mine specimen…
Minerva No. 1 Mine, Ozark-Mahoning group, Cave-In-Rock Mining Sub-District, Hardin County, Illinois, USA