Calcite
Photos Roger Weller, geology instructor
wellerr@cochise.edu copyright 2008-R.Weller
calcite, travertine-1
Tivoli, Italy
Travertine is a porous, massive calcite
formed by deposition from surface waters.

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