UPM07A Copper
Champion Mine, Painesdale, Houghton Co., Michigan, USA
6.1x 3.0x 2.0 cm
$665
A great example of this very distinctive copper habit from the the Keweenaw Peninsula. These clusters of dentritic “herringbone” crystals are a hallmark of the Champion Mine (the one in Houghton Co., not the one in neighboring Marquette Co.)— it is easy to mix up the localities of a lot of Michigan coppers, but not these! This mine operated between 1899 and 1967, with the bulk of the work done before 1945.