Copper
PhotosRoger Weller, geology instructor
wellerr@cochise.edu copyright 2008-R.Weller
large copper crystal
Keweenaw Peninsula, Michigan
Some of the largest copper crystals ever
found have come out of the copper mines
in northern Michigan.

copper
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.