grooved stone with hole

[mtdewman]

I spent the weekend in Miami. Sunday night my girlfriend and I are walking along South beach and this washed up in surf in front of us. Its grooved on both sides and has a hole in it. Please help identify what this might have been used for.









View attachment 1081440

 

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[villagenut]

If it washed up on South Beach it is probably just an Ocean Worn stone with a hole in it.

 

[Broken knee]

It looks like a net weight to me, nice find. HH
BK