Please help identify

[TjTreasures]

Howdy! I found this rock awhile back and it looks to have either wood or another rock or something that grew inside , can anyone tell? I will take a better picture later but here are the ones on my phone :-)
Thank you in advance and have a lovely day’

 

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[a2jones]

larger pieces look like bone.

 

[DDancer]

Look like fossils, you can try that forum as well. I'm not a good fossil guy.

 

[Eu_citzen]

Those look like belemites.