What is this mineral/stone

[ILMETEORITES]

I'm a meteorite hunter, I also use the minelab xterra elite. But I found this in a rock pile in North Central IL. I was out looking for meteorites in rockpiles, I'm waiting until Monday then going on a hunt in Estherville Iowa. Anyways found this and have no idea what it is, it does attract a magnet, is very heavy, feels heavier than iron or maybe same. It has no rust, doesn't look man made, but also don't look like any natural mineral that attract a magnet. I'm stumped. Thanks in advance. JOE K

 

[ILMETEORITES]

It is solid metal, and the cut window you see was etched with a 7.5% nitric acid solution, I expected it to turn black, however it just showed small lines in it, that somewhat resemble Neumann Lines in meteorites but this isn't a meteorite, a couple of the "crystals" (after soaking on the solution) show what looked like a very fine widmanstatten pattern, but again this is not a meteorite. So I'm wondering what metal with this structure would show anything like this and be so heavy. I did I quick "probably not 100% accurate density test that came out as 7.6, could be a bit lower, due to inaccuracy of the quick test wouldn't be higher, but is pretty close.

 

[Johnho]

Wow, that's a tough one. I spent a bit of time trying to find something like it. My first thought was an iron slag. But slag does not usually show the slow cooling characteristics this shows. However I did find something similar to yours from a flow-banded slag from Durango, Colorado. I have attached the link. so slag can form in this manner but it seems rather uncommon. https://turnstone.ca/rom176ds.htm

 

[ILMETEORITES]

Could it be arsenopyrite? Is it solid metal inside and is it ferromagnetic? It could be with magnetite but there is no streak on ceramic.

 

[casull454]

The crystal shapes look like galena, but that wouldn't be magnetic.

 

[ILMETEORITES]

When I seen it I thought galena but the magnet sticking gets me, and no streak so no magnetite or hematite in it

 

[Johnho]

It's not arsenopyrite. It would have a grayish black streak. Whatever it is it would not be natural to where you found it.

 

[ILMETEORITES]

It's not natural to here as far as I know, we do have a lot of stones brought here by the glaciers way back, probably originated in Canada someplace north of here.the fact I think it's heavier than pure iron and also pretty ferromagnetic stumps me and everyone else I've asked or shown it to. Do you think there is any chance it's man made and not natural? I'll try and get better pics.

 

[ILMETEORITES]

The discoloration I believe is from the nitric acid etching solution, however it didn't do that to the cut and polished window.