🔎 UNIDENTIFIED Strange stones with holes at the center

[Altosoro]

Hi, I found those strange stones near a lake a couple of years ago. Does someone have an idea of what they are?

 

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[pepperj]

Have they the weight of a rock or are they on the light side?
Cool looking for sure-kind of look like a seed/nut of sorts.
If I didn't see you holding them and saw a picture as this-old rusted up bed pan comes to mind.

 

[pa plateau hiker]

I find those kind of rocks in small brook streams. They are not that rare. If I remember correctly, the hole in the rock was a softer mineral and washed out over the years from the river current. Someone out there knows for

 

[traveller777]

What you have are Hag Stones. Thanks for posting.

Hag Stones

A ‘Hag Stone’ also known as a Holey or Adder Stone, is simply a stone with a hole in it. The holes in Hag Stones are naturally occurring either as a result from the boring of a bivalve …

drbeachcomb.wordpress.com

 

[GoldieLocks]

One almost looks like a fossilized large nut like half walnut shell?