Can anyone ID these rocks ?

[MUD(S.W.A.T)]

Hello,

My girlfriends dad found these rocks... Wondering if anyone had any info on them. The brown one (Third and fourth photo) came from a swamp, and has like a fossilized mud on it. The other one is unknown where it was found. However that one is the black (1st and 2nd photo) and has all the holes and it is magnetic and you can see some iron. If anyone knows any info on these. Maybe has a value for them, that would help us a lot !! They are both about the size of a softball.

Thank you so much and HH !!

 

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[Eu_citzen]

The second rock is really hard to see what colour it has.

The first one could be slag.

 

[MUD(S.W.A.T)]

Click on the images and it should blow them up. Thanks for commenting !

HH !!

 

[MUD(S.W.A.T)]

No one has a better idea about the brown one on the right, the last 2 photos. ?