Opal Photos                        

Cochise College                                                            
Photos of Minerals
Geology Home Page
Roger Weller, geology instructor                       



Also visit  Photos of Opals 
for a more complete coverage on opals.

last edited:  12/22/15    number of photos:  5
Opal is SiO2.nH2O                                                                                                                               
common opal-tan color:  1
common opal-white:  1
boulder opal:  1

fire opal from Nevada:  1
synthetic opal:  1

Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2015-R.Weller