Cliff mine
![Native copper specimen from the Cliff mine. Size 2.4 x 1.3 x 1.3 cm.](/Images/godic/202501/05/Copper-d31d2707.jpg")
![A large native silver specimen from the Cliff mine, 5.5 x 3.7 x 2.8 cm.](/Images/godic/202501/05/Silver-d06-232a2707.jpg")
The Cliff mine was the first successful copper mine in the Copper Country of the state of Michigan in the United States. The mine is at the now-abandoned town of Clifton in Keweenaw County. Mining began in 1845, and the Cliff was the most productive copper mine in the United States from 1845 through 1854. Large-scale mining stopped in 1878.