Opal Photos
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu    copyright 2010-R.Weller

 
common opal-white
Opal is filling a thunderegg.
 

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