An underground copper mine consisting of one shaft and one adit near Mass City, MI. The Ridge Mining Co. organzied in 1850 and worked until 1855, when it was leased by tributers until 1863. In 1863 the company was reorganized and leased the mine ontribute until 1896, when the land title was lost due to unpaid taxes. The mine was absorbed by Mass in 1899. The mine produced approx. 5.5 million lbs. of refined copper. The Ridge Mine was exceptionally rich in silver, and some nice silver specimens can still be found today, as well as copper and copper crystals.
Mineral List
5 entries listed. 4 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
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.
Mineral and Locality Search
