Found these in a river in Massachusetts. Arrowheads have been found there as well.

[Moonman]

I don't know what they are. Has anyone found something like these? What could they be? Thanks, Ray

 

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[DizzyDigger]

What a cool find...

To my eyes, they appear to be natural, river worn rocks. Unusual, but
I believe naturally occurring.

 

[Moonman]

What a cool find...

To my eyes, they appear to be natural, river worn rocks. Unusual, but
I believe naturally occurring.

Thanks for your help.

 

[DizzyDigger]

Thanks for your help.

You are most welcome, and welcome to the the TNet express..

BTW, don't take my word as gospel..gave ya my best guess, but I'm no
expert on rocks.

 

[smokeythecat]

Maybe maybe not natural. Depends on what the other rocks nearby look like. Cool though.

 

[gettothepoints]

Wow, those are something else! I could see the triangle being natural, but man that one on the right - if natural, is absolutely stunning.

 

[tomclark]

Those are ceramic tumbling deburring media

 

[Relicgrubber]

Tom is correct on the Deburring Media...

 

[unclemac]

from time to time I find obviously planted tumbled stones or modern arrowheads, as if someone is training their kid to hunt.

 

[Moonman]

Those are ceramic tumbling deburring media

I looked that up. I found a picture of the one on the left. The one on the right looks like it might be bone or something else. Thanks for your great answer. Ray