Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
sphalerite crystals from Peru-3
surrounded by quartz crystals
Huaron district, Cerro De Pasco, Peru
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Specimen courtesy of Belkis Minerals
P.O. Box 5744, Bisbee, Arizona 85603