@patrykw,
Randy Korotev is a meteorite specialist . Hes a lunar geologist . You can google him and send him the picture of your rocks with the reaction skin and those little indents (we call em regmoglypts).
Im thinking these are rocky meteorites because the magnetism isnt that extreme.
An Fe/Ni would yank a magnet off the refrigerator and itd be hard to unstick it from the meteorite. Good luck with Randy, hes in touch with folks from all over the planet.
Hes got a weird ense of humor so dont be put off. Hes got a web page about mteorites and he includes some instructions if you insist on contacting him.