Polished Ammonite Split Pair - SOLD 4.272" Cleoniceras javelina With their large frill

With their large frill

Brittle Stars are one of the oldest groups of animals in the fossil record

In the ancient past of the Carboniferous Period

the chief catalyst of this extinction event is a series of massive volcanic eruptions known as the Siberian Traps

This exclusive item is crafted here at the Mini Museum workshop with a crystal-clear glass top

Polished Ammonite Split Pair - SOLD 4.272" Cleoniceras javelina With their large frillAmmonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 4. 272" 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