Macrophotograph of the structural details in a plume agate; from the Owyhee region of eastern Oregon Image #3754 6293 X 4827 pixels
Macro photograph of the colors and patterns in a tube agate Image #2733 5241 X 3970 pixels
Strong angular backlighting emphasizes the concentric structure patterns this Montana agate Image #2698 4558 X 3200 pixels
