Small Tooth?

[bilt46]

Found this along a small creek, is this a plant or a tooth? Fossil? It feels like stone...
Thanks for looking.
BILLT.

 

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[Harry Pristis]

Found this along a small creek, is this a plant or a tooth? Fossil? It feels like stone...
Thanks for looking.
BILLT.

It's a solitary, rugose coral from the Paleozoic.

 

[Tuberale]

In addition to the horn coral already suggested, might be a portion (not complete) of a crinoid. Looks somewhat similar. I'm not an expert, though.