Agate Photos
Cochise College
Photos of Gemstones      Translucent Gemstones     
Virtual Geology Museum       Hall of Rocks
Geology Home Page
Roger Weller, geology instructor                       

wellerr@cochise.edu      copyright 2008 

Lake Superior agate-D
Weathering illustrates the difference in toughness between different layers
within the agate.
 

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