Polished Ammonite Split Pair - 4.455" Cleoniceras dendrite This is an authentic fragment

This is an authentic fragment of concrete from Alcatraz Penitentiary

first appearing 145

5 billion years old

Please Note: Sizing on this specimen refers to the amber itself

Polished Ammonite Split Pair - 4.455" Cleoniceras dendrite This is an authentic fragmentAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 4. 455" polished Cleoniceras fossil from Madagascar. The fossil has been split into a paired set to showcase the beautiful internal chambers of the shell. These internal chambers are called septa and the ammonite could fill them with air in order to float through the ocean like a balloon. After millions of years, they are now