Roger Weller, geology instructor
wellerr@cochise.edu
copyright 2004-R.Weller
Pyrolusite
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.