d_day

Full of vesicles?

Could be vesicular basalt, but I think it's most likely to be slag.

I've seen some stunning pieces come out of those places. The only time I went I got mostly low quality fragments, but I did find a nicely terminated green micromount.

Looks like silicon carbide, which would mean it is not a meteor.

Not diamond. Might be a little drusy quartz.

I haven't heard many of these though I'm sure they're out there. One I did experience personally was that my great grandmother used a 40 pound silver ingot as a door stop.

The Tucson ring and the Carleton were used as anvils for a time.

That's pretty much the same thing I've heard.

I don't see anything natural looking about that "rind." There is no doubt in my mind that this is a chunk of glass.

Can we get some photos with proper lighting? The poor lighting in some of these photos makes it look like azurite with malachite, and other photos make it clear there are neither of those minerals in the specimens.

Yep, glass.

"Lighter than most rocks" means its most likely coal.

How hard is it? Is it extremely light, or somewhat heavy? Where was it found? I think it's probably a low grade obsidian, but might also be black dacite, basanite, potch opal (not likely), or anthracite coal. I can narrow it down with answers to the above questions.

Small stuff is always so hard to ID.

Almost looks like wavellite.