What kind of rock is this ??? Mabye a peice of iron?

[chriseneim]

I found this in the hill of ahwatuke Arizona it's almost rusty but is really heavy and looks like some kind of silver metal is in it aswell. Ideas ?

 

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[Old Dominion Thomas]

Could it be bog iron?

 

[chris rizin]

What kind of streak, if any, does it leave on writing paper?

Looks like graphite..

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