What kind of fossil

[jtw1313]

........

 

[hucklburry]

I'm not sure but I like it

 

[Kray Gelder]

Ammonite.

 

[Kray Gelder]

That particular style was in vogue from about 250 million years ago until 200 million years ago IMHO. I tend to ball park things, so someone else will come along and narrow it down more.

 

[Nathan6309]

That's an ammonite. I'm pretty sure that's an index fossil.

 

[Charlie P. (NY)]

An ammonite that has been halfed and polished.