Help! Is this a rock, fossil, some thing else?

[Brandisb]

I am new to treasure hunting. Found this in sticky clay of natural spring on S. Oregon coast. Has shiny outer shell and a smooth grain under loupe.I have looked in all rock, mineral and fossil pics I can find. Not magnetic. Any help is appreciated.

 

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[Fat]

I think it is a nephrite Jade nodule. I really hope so anyways. We will both find out for sure. It is neat!

 

[Brandisb]

Thank you..have a great day!