Manganese Mine
Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
An overgrown former manganese mine on the Keweenaw peninsula, known for micro mineral specimens.
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The site is the type locality for Macfallite, as well as over twenty other minerals, some of which are rather uncommon.
There is an excellent writeup of the site and the surrounding area linked below, titled ‘Manganese Investigation in Keweenaw County’, as a PDF on the michigan.gov website.
Further reading
- https://www.mindat.org/loc-3852.html
- https://www.researchgate.net/publication/280163323_Collector’s_Note_A_New_Find_of_Manganese-rich_Pumpellyite_from_the_Manganese_Mine_Copper_Harbor_Keweenaw_County_Michigan
- https://www.michigan.gov/-/media/Project/Websites/egle/Documents/Programs/GRMD/Catalog/06/GIMDL-OFR882.PDF
We may have specimens from specific locales around Michigan including:
Michigan- Laurium Mine, Osceola, Michigan, USA
- Manganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA