Polished Ammonite Split Pair - 4.816" Cleoniceras klarna This specimen is a travertine

This specimen is a travertine speleothem cross-section

and Their Extinct Relatives

It's a little-known fact

019" Devonian Period trilobite fossil

which lived over 440 million years ago

Polished Ammonite Split Pair - 4.816" Cleoniceras klarna This specimen is a travertineAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 4. 816" 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