Macrophotograph of the colors and structural detail in a piece of cut and polished Blue Mountain Picture jasper from Oregon; jasper is a variety of chalcedony (cryptocrystalline quartz) Image #3691 4080 X 6144 pixels
Macrophotograph of a cut and polished Hijo del Sol agate from Mexico Image #3865 6083 X 4021 pixels
Macrophotograph of the structural details in a plume agate; from the Owyhee region of eastern Oregon Image #3755 4080 X 6144 pixels
