A variety of seashells including nautilus, lined moon, and tiger moon Image #1902 4749 X 3169 pixels
Cut pearlized nautilus shell converted to black and white Image #1506 4080 X 5568 pixels
Macro photograph of patterns and colors in a piece of petrified wood (Woodworthia species) from the Chinle Formation in Arizona; approx. 225 million years old Image #2615 4689 X 5977 pixels
