Blade sharpener?

[CraigBrown]

Not sure what exactlly this is. Made of stone. Dings solid 24 on detector.

 

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[ANTIQUARIAN]

It almost looks too course to be a sharpening stone wheel, possibly a weight used in an early manufacturing plant setting.
A bit of background information on where you found it would be helpful.

Dave

 

[ticndig]

looks like a bench grinder wheel to me

 

[CraigBrown]

found it in the Ottawa river. in 2 feet of water. the stone is ribbed with iron i be-leave. the copper piece was found near by, passably fits in the center. or is not part of it at all

 

[CRUSADER]

Did they have quern stones over there? (looks like a broken one)

 

[ticndig]

it's man made for sure , blow the pic up and see the reinforcing wire that gave the signal to his metal detector .
had to look up quern stone , never heard of one .

 

[CRUSADER]

it's man made for sure , blow the pic up and see the reinforcing wire that gave the signal to his metal detector .
had to look up quern stone , never heard of one .

Ok, not a quern then, must be pretty modern.