"Ammonite necklace - pyritized ammonite necklace - fossil necklace - spiral shell necklace - AMD1 145 - 201 millions years old... A peaceful, one of a kind pyritized ammonite from Germany is wire wrapped onto a 16 inch 14k gold filled or sterling silver chain. Please feel free to select a different length chain if you prefer and your favorite ammonite as shown in the fourth photo. \"G\" is the only inverted option and it is amazing! Ammonites are the most widely known fossil that first appeared Ammonite Necklace, Fossil Necklace, Spiral Shell, Old A, Shell Necklace, Shell Necklaces, Sterling Silver Chain, Pure Silver, Sterling Silver Chains