Photos of Opals
Cochise College    
Opal Cabochons  
Geology Home Page

Roger Weller, geology instructor     copyright 2011-R.Weller

blue green opals from Peru-1

opal                                                                                                                                                                                    161

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

Gemstones courtesy of Vista Gems
Specializing in precious and semiprecious stones
Jay and Mona Khan
P.O. Box 184, Skillman, NJ 08558
phone: (908)-218-5139