Photos of OpalsCochise College
Opals- Rough Opal and Specimens
Virtual Geology Museum Hall of Gemstones
Geology Home Page
Photos of OpalsRoger Weller, geology instructor
wellerr@cochise.edu copyright 2008-R.Weller
common opal-3
Brazil
Photo is copyright free for non-commercial educational uses.
Just
credit photo to R.Weller/Cochise College