Polished Ammonite Split Pair - 4.752" Cleoniceras earliestlife " ~ Christa McAuliffe (1948-1986)

" ~ Christa McAuliffe (1948-1986) (Source: TIME Magazine February 10

which measures 6

which produces the vivid iridescent sheen

" Science 338

Please Note: Specimens vary in shape and thickness

Polished Ammonite Split Pair - 4.752" Cleoniceras earliestlife " ~ Christa McAuliffe (1948-1986)Ammonites are an extinct group of cephalopods that entered the fossil record 400 million years ago. This specimen is a 4. 752" 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