What is this thing? What kind of metal is it??

[Scrapcrazy]

::sigh:: no offense guys.. but I'm not an idiot.. its not concrete.. its not fiberglass...
the entire thing is METAL of course I hit it with a hammer.. it goes " BONG " it has a thin plaster coating on the outside of it like I said.. its not magnetic so I thought I would ask if you guys could tell me what kind of metal it might be.....

Hehehe! It looks like it could be plastic. Sorry, I couldn't resist.

[YardApe]

Sure looks allot like "manganese". Your description also sounds like manganese.It is non-magnetic is often mistaken for stone or concrete.But its hard to say for sure from the picture.But my money is on manganese

[Whm1]

it resembles a sink...I tyhink it is a zinc lined sink basin. Made of wood or stone and wrapped with zinc. Are we taking bets yet?

[AuburnEwaste]

It's concrete. Look at the chip on the bottom in the last picture.