Blue coral or bone??? Help!

[Amber111]

Not a clue... just a beginner. Thank you!

 

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[Kray Gelder]

With nothing to go on, I will still hazard a guess...fossil rib bone.

 

[Amber111]

Thanks. Found it gardening in Northern California

 

[AeroMike]

That is bone.

 

[Indian Steve]

Blue color is sometimes caused by being in a fire.

 

[Amber111]

Thank you! That’s interesting. There was a fire here over 100 years ago.