It has to be something...right?

[Vpb3903]

Hello!  Any ideas on what this could be?  I found it years ago in a small Cincinnati river bed.  It is free standing and not carved out...at least by hand.  To me it resembles a bone ball joint.  Any ideas?  You all would know far more than me!  Thank you!  Length is 3” x 2” at top

[Peat Burns]

Looks like a chunk of orthoconic nautiloid. Late Ordovician.

[Nautiloid]

I agree with @Peat Burns. Looks like an orthoconic nautiloid. 

[Vpb3903]

2 minutes ago, Nautiloid said:

orthoconic nautiloid

I hope you both see tthis...not sure what I’m doing.  Thank you so much!

[Nautiloid]

1 minute ago, Vpb3903 said:

Thank you so much!

No problem