The ammonite mollusk was a cephalopod with a shell in a coiled, spiral shape. Due to their body shape, these fossilized creatures are symbols of continual change and evolution. They are an excellent tool to assist you in moving from the old to the new.
Ammonites have absorbed cosmic energy over eons, allowing them to draw off all negative energies. Look at the Ammonite spirals as a filter, drawing in the dense energies which are no longer needed, moving them through the coils, and releasing them as fresh life force energies.