Tooth shaped fossil ? near Shoal Creek, Austin

[Lasygne]

Found this near shoal creek after excavators came through. Tons of other fossils like  Illymatogyra arietinas around. It is shaped like a tooth, and I noticed the marks that look like dentin lines. No enamel, wondering if it could be a completley mineralized tooth. It's about 4 inches. 

 

 

 

 

[Fin Lover]

Sorry, not a tooth.  Even one that has lost all of the enamel will look different than this.  I'm not seeing anything that looks like dentin.  

[Lasygne]

24 minutes ago, Fin Lover said:

Sorry, not a tooth.  Even one that has lost all of the enamel will look different than this.  I'm not seeing anything that looks like dentin.  

By dentin , I meant the lines at the front of it separating top and bottom. Thanks for ruling out tooth! The shape feels deliberate.  The front is thicker and tapers back. Could it be a tool? Got a bunch of other cool little fossils, then this was sticking out looking different among the stones and marl. 

[Kane]

Not seeing any evidence of this being worked, so I'd rule out tool as well. 

[Lasygne]

Thanks. Learning!!

[Fossildude19]

Vaguely tooth shaped rock. No enamel, no root structure or texture, no bilateral symmetry.

No actual tooth morphology.

Definitely a rock.

[Mark Kmiecik]

Mother Nature is very good at making rocks like teeth and other things. Too good. Sometimes you could swear it is, but it isn't. In time with exposure to thousands of examples you get better at telling them apart.