are these wrought iron nails?

[Pegleg]

Square cut nail is the most interesting to me looks a bit long to be a farriers nail and the top isn't tapered to slot into a shoe.

http://imgur.com/bZrIE5r

http://imgur.com/tc5cUty

 

[silver]

One on the left looks like a horse shoe nail,.. if the perfect square one is copper than it's a boat nail, if not then just a building nail,.... hockey stick looking thing(I don't know).