What type of metal is this?

[Huskarl]

I found these pieces of metal/stone with my detector. First I was sure it was lead but when I tried bending it, it broke and inside was this chrome like material. Does anyone here have an idea what this is?

 

[Reed Lukens]

burnt tin foil from hitting the bong to long

 

[Broken knee]

Sorry I have no idea, may I ask did you find it near a lake? HH
Broken knee

 

[arnofarrell]

looks like burnt aluminuim.