The rounded knob would suggest it is haematite and the magnetic properties suggest magnetite- both iron ores. To me it looks like a lump of slag, which is a byproduct of mining/furnaces.
I don't think it is a meteorite, a meteorite would tend to be a little uniform over the surface and richer in elemental iron.
This is what a typical iron/metallic meteorite looks like:
This is what a blob of smelted metal looks like:
I conclude that you have a nice blob of metal that missed its mold during a casting process or was melted in an accidental fire.