It's slightly magnetic with common refrigerator magnets. They won't stick, but you can feel it pull.
I'm pretty sure I have a piece of slag too. Got kind of excited again until it dried off and you could really tell.
Slag to the left, and only weighs half as much.
Not sure I've seen the oxide before, but in pics I can see some similarities.
Wow, that's impressive. I'm not sure if I'd sell it though. I've had it for so long. It's become quite important.
I mean, a few thousand... I'd have to think really hard about that.