Coin Pendant?

[velocityboy]

Found this in my front yard today (House dates back to early 1800's)
It's been through quite a bit, whatever it is. It's not attracted to a magnet, but it does have a hole that goes right through. Thought it might be a coin turned into a pendant of some sort. any ideas? There isn't any lettering or other markings evident. How could I best determine what kind of metal it is?
Thanks,
-Brian

 

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[Hank]

That is the amulet worn by one of the "Big Foot" kids, [his called LittleFoot], to scare away superstitious North Americans. Return it at once...or you may wake up with the curse of Trenchfoot.