Macrophotograph of the structural details in a plume agate; from the Owyhee region of eastern Oregon Image #3755 4080 X 6144 pixels
Backlighting enhances the structural depth of an agate Image #2750 3200 X 4800 pixels
Macro photograph of a cut and polished Dryhead agate from Montana Image #3361 6064 X 3842 pixels
