Roger Weller, geology instructor
firstname.lastname@example.org copyright 2012-R.Weller
Arizona blue opal-4
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Opal specimen courtesy of Blue Opal
Specializing in blue opal from southern Arizona
22345 N. Evans Rd., Huachuca City, Arizona 85616