Roger Weller, geology instructor
Carchelejo, Jaen, Spain
Prehnite is a hydrous calcium aluminum silicate mineral associated with zeolites.
It is identified by its pale green color and its crystal habit of forming sphere-like
clusters or botryoidal encrustations. It is a secondary mineral associated with
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Mineral specimen courtesy of Belkis Minerals
P.O. Box 5744, Bisbee, Arizona