Polished Ammonite Split Pair - 3.307" Cleoniceras mm2 60" long and is 1"

60" long and is 1" in diameter

It dates to the Cambrian Period

The specimen is enclosed in an acrylic specimen jar with a removable top which arrives in a handsome

Produced in fiery metamorphic rocks like those found along hydrothermal vents

Polished Ammonite Split Pair - 3.307" Cleoniceras mm2 60" long and is 1"Ammonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 3. 307" 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