This ammonite fossil is from Morocco. It’s been sliced in half and polished revealing the beautiful inner chamber detail. During fossilization the shell of the ammonite was replaced by pyrite. Morocco has vast deposits of Devonian Limestone which date back three hundred fifty million years. Ammonites found today in Morocco once flourished in a warm shallow sea which covered what is now the Sahara Desert. As the shells of the creatures accumulated on the sea floor, they were buried by sediments and, over the ages, transformed into stone by physical and chemical processes.