This is a Pyritized Ammonite which is a very Special and Rare type of Ammonite from Russia. Ammonites that have fossillized usually get turned into rock after millions of years being buried underground, but this special type turned into pyrite instead of common rock or agate. Russia is the only site in the world where these are found. This is an old stock specimen which means that it was mined out a very long time ago.
Metaphysical properties: The Ammonite is a very powerful earth healing fossil. Its spiral shape symbolizes continual change and evolution. Ammonites have absorbed cosmic energy over eons of time and help to stimulate the life force (Chi) within. Ammonites are often used for activating Kundalini and life path energies. The Ammonite is also often recommended to put in the home to attract health, prosperity and success.
The Ammonite draws off all negative energies. Think of the Ammonite spirals as a filter, drawing in these dense energies which are no longer needed, moving them through the spirals and releasing them as fresh, positive, loving life force energies.