This looks like part of an ammonite, @Lion-Petri. Do you know where it was found? That will help with the identification. Also, adding a photo with a scale of some sort would also be useful!

in Baden Württemberg in Germany. i have no scale. but i could improvis 😅

Could also be a brachiopod she’ll fragment!

*she’ll

**shell dumb autocorrect

aminite

I would love to know I have 5 with same similarities ?

Does the broken end have a radial pattern (spokes on wheel)? If so, could be a coral and if not it could be a cephalopod.

there is a pattern like rings from a treestomp

But nothing crossing the rings?

there r some “lines” going from the Center to the outside

It is a rugose coral. I was able to zoom in on the end.

thx😊

That line pattern is called radial and is typical of corals.

Horn coral

It is not coral it is Belemnites

A squid like creature

belemnite top definetly all my belemnites look like that