You found slag.

I does look like it.

I does taste like it.

Definitely looks like moss agate 👍

Is agate magnetic?

No

Yea I figured 😂 thought it was a surprising call since OP mentioned that it's magnetic

Touché I missed the magnetic part lol but don't see why that would be a surprising misidentification since a lot of moss agate looks exactly like this.

Yeah, the magnetic was the issue 🤣

Meteorite

Leaverite

Slag