Rock or tool?

[Coinstar magnet]

My wife and I were on Whidbey island awhile back and this caught my eye. At first I thought it was a bone...maybe a tool? Any thoughts?

 

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[uniface]

Rock.

 

[TreasureCatto]

Looks natural imo

 

[Coinstar magnet]

Rock.

Thanks... straight and to the point

 

[Tdog]

A natural formation from erosion.

 

[Coinstar magnet]

A natural formation from erosion.

I think that answers the question

Thanks all!