Macro photograph of the structural detail in a sliced Graveyard Point plume agate from eastern Oregon Image #3433 6144 X 4912 pixels
Macrophotograph looking into the depths of a cut and polished moss agate; from the Lucky Strike mine in Oregon Image #3615 6026 X 4034 pixels
Strong angular backlighting emphasizes the concentric structure patterns in a Montana agate Image #2697 2811 X 4726 pixels
