Looks like part of a fish

It would be helpful if you could tell us where you found it, and the background of the place (like what the layers or layer dates back too e.g. Devonian, Jurassic, Eocene, and the rest)?

In an open pit Family’s land that was Dug years ago Williams County North Dakota same area where I found two fossilized sea turtles

Looks like a stingray dental plate but I have never seen one in which the material was indistinguishable from the encasing stone.

maybe a stingray dental plate?

orthocone shell?

or a segmented invertebrate?

or probably just a stingray plate.

on the left is apparently a fern. on the right is a scallop fossil. center object isn’t clear enough to identify, so please take more pictures.

shell fragments

Yes there’s some fragments and whole clams I’ve pulled out

appears to be a mix of gastropod and bivalve/brachiopod shells.