Close up of a cut and polished lace agate Image #3388 4800 X 3200 pixels
Linear patterns in a thunderegg agate from Oregon. Thundereggs are nodule-like rocks and are found in layers of rhyolitic lava flows. Image #3701 4038 X 6081 pixels
Macro photograph showing the patterns in sliced Brazilian agate Image #2861 4799 X 3112 pixels
