Photos of Opals
Cochise College    
Opals- Rough Opal and Specimens
Virtual Geology Museum      Hall of Gemstones  
Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu     copyright 2008-R.Weller

 
fire opal within a lava ball-2
Boi Morto Mine, Pedro Segundo, Brazil
The outer surface of the lava ball is smooth, but where the surface is broken
the basalt is vesicular.

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

Opal specimen courtesy of Opex Opal
Specializing in precious opals and opal jewelry
Dagbjorn Johnson
P.O. Box 50548, Santa Barbara, California 93150
opexopal@verizon.com
opex@hotmail.com