These are unique tiles that you will not find anywhere else. ‚ Own yourself a piece of history. Small Ammonites on Uncut Slab – Dactylioceras (small) Era: Lower Jurassic – 180 million years old Location: Holzmaden, Germany **Disclaimer: These small ammonite tiles vary in different shapes and sizes. Your ammonite tile will be similar to the images listed, but not guaranteed to be the ones in the image. An image is available of the tile prior to purchase.