Cochise College           Photos of Minerals

                          Geology Home Page

                          Roger Weller, geology instructor

                                  copyright 2004-R.Weller


pyrolusite crystals
Pyrolusite is manganese oxide.  It is a black, rather hard mineral (6 to 6.5) and is a major ore of manganese.

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