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National Mine, Rockland, Ontonagon Co., Michigan, USA

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An underground copper mine consisting of seven shafts located just south of Rockland, MI. The National Mine was chartered in 1848 and worked until 1871. The mine was worked on tribute until 1893, when the mine was closed for good. The National Mine produced approx. 11.6 million lbs. of refined copper. The mine piles today produce quality copper and silver crystals, copper chisel chips, and malachite.

Mineral List



16 entries listed. 13 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Rocks & Min.: 58: 112

Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.

The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed., 44 pp.

Clarke, D.H., 1978, Copper Mines of keweenaw: Minesota Mining Company, No. 11, 28 pp.

Mineral and/or Locality  
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