Gypsum
Photos Roger Weller, geology instructor
wellerr@cochise.edu copyright
2008-R.Weller
pseudomorph of manganese oxide after
selenite crystal
Selenite has been completely dissolved away.

gypsum
Photo is copyright free for
non-commercial educational uses. Just credit photo to R.Weller/Cochise College.
Specimen from the Cochise College
collection
cochise037