Locality: Lake Superior Copper District, Houghton County, Michigan, USA
Dimensions: 10.5 x 3.5 x 2.3 cm.
Ex. A.E. Seaman Mineral Museum, Ben Vone Collections
This is a superb group of sharp, twinned tetrahexahedral copper crystals with a beautiful “antique” brown patina and very nice aesthetics from the famous Keweenaw Peninsula of Michigan. From the collection of the A.E. Seaman Mineral Museum in Houghton, Michigan. A great Michigan copper! Mark Cross photo.
