Macrophotograph of the structural detail in a cut and polished agate Image #4055 6144 X 4080 pixels
Macro photograph of lines and circles in a Brazilian agate Image #4047 4800 X 3200 pixels
Macrophotograph of the structural details in a plume agate; from the Owyhee region of eastern Oregon Image #3754 6293 X 4827 pixels
