Petrified or fake?

[possible redwood petrified]

Found this while bottle digging Monte Rio California. Some say legit other say fake I want to know this is how I find out

[Rockwood]

It could be petrified wood. The transectional crack in it tends to indicate that. A look at the end might help. You may need to clean a facet for a good look the structure though. 

[Yoda]

Photos aren't clear, but It does have a wood vibe

 

As @Rockwoodhas said, photos of the ends would be helpful 

[RJB]

My first, and only thought, was wood.

 

RB

[jpc]

My first thought was...out of focus.

 

 

[Fossildude19]

Could also be a cast of wood.  Definitely need to see the edges.

[M Harvey]

That sure looks like a turtle pleural.  Can you share a photo of the other side?

[BobWill]

The question of wood or not wood is separate from the question of fake or real. You would need to consider whether it would be worthwhile to fake this piece and the answer is "no." To tell if it's wood just needs more details.