What's with the hole?

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Found this and curious about the hole at the top. My first thought was Indian tool, maybe for fishing?
Thank you

 

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[Indian Steve]

I am thinking that it might be natural but would like a couple of close up pictures of the hole to see if it looks drilled or not.

 

[grasshopper]

It might interest you to post here for some additional responses:

North American Indian Artifacts

 

[VERMONTIS]

Think it could be a net sinker.

 

[sutphin]

LOOKS LIKE A INJUN MEDALLION