Pair of polished black ammonites (Cleoniceras), pair

Section of a fossil ammonite of the genus Cleoniceras. Similar to the Cymatoceras boatworm, the individual chambers filled with rare black aragonite, emerging in a spiral, attract attention at first glance. The living ammonite always occupied the last larger chamber. This animal dominated the Cretaceous seas with other fossils such as Lycoptera davidii, which you can also find in our offer.