Your specimen is probably just a rock. Knowing the location and if there are ring like structures in the cross sectional view might change my opinion. I have seen petrified wood from New Jersey, USA that has a similar appearance.
Its petrified wood maybe a type of pine but you can see the difference on the outside, well what would have been bark and the smooth inside of a different color and texture. I have some example of petrified wood and one that isnt. and this isnt