Macro photograph of the patterns in a piece of fossilized oak from Oregon; Miocene in age Image #3415 4800 X 3200 pixels
Macrophotograph showing the iridescent colors of ammolite (Placenticeras sp.). Ammolite is composed of the fossilized shells of ammonites and gained gemstone status in 1981. This specimen is late Cretaceous in age (70 million years) and is from the Bearpaw Formation in Alberta, Canada. Image #4325
Unusual coloration in an Ammonite (Cleoniceras cleon) fossil; Middle Cretaceous (110 million years ago); from Madagascar Image #2423 3200 X 4800 pixels
