Polished Ammonite Split Pair - SOLD 4.51" Cleoniceras rockinaboxcleoniceras The nacre is rich in

The nacre is rich in aragonite

Individually numbered Age of Dinosaurs were limited to our Kickstarter backers

Challenger LRSI Tile Fragment

Each specimen comes with a photo card that also contains authenticity information on the back

Polished Ammonite Split Pair - SOLD 4.51" Cleoniceras rockinaboxcleoniceras The nacre is rich inAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 4. 51" 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