Ammonites are an extinct group of mollusk animals that are closely related to octopuses and squid. The earliest traces of Ammonite date back to 420 million years ago, while the last known traces fall to 60 million years ago. It measures from a 3.5 - 4 on the Mohs hardness scale. While specimens have been found almost everywhere on the planet, Antarctica is well-known for its rich ammonite fossil sites.
It's no surprise that ammonites, with their spiral shape, are symbols of change and positive motion. The spiral draws in negative energy, filtering it through the chambers and releasing fresh, positive energy.