Alan

Air bubbles and oven brick.

This thread has become an echo chamber.

Yes.  Age is TBD.

First is likely a divided ribbon core.  Second is a banded (coreless) swirl.

Yes

Looks Vacor from here.

As noted - a divided ribbon core.  The cane was cold-ish when the shear was made and they didn't round it properly in the cup.

And try a neutral (light gray etc) background.  Your camera is averaging the exposure based on the majority black background.

The use of flash is over-exposing the pic and eliminating details.  Also, try looking at it in a shallow glass of water.

UV, but not Vaseline.

Modern - either clay or synthetic.

I have eaten lunches older than that.

Its new glass.  Likely Jabo.

The 1950s classics - Watermelon, Spiderman, true Green Hornet(a lot of wannabe's and anemics out there).  Oxblood on the first two seem appealing to many, but is incidental to the batch.

3 minutes ago, Fire1981 said:

Of course. SP was one of the greatest marble Artists that could work with every glass you can imagine 🔥

RAR

And some types one shouldn't imagine.

Torch

Vintage.

Wonky Alley for me.

The "purple" is an anemic black patch allowing the white base to show through.

No

If you can't see 'aventurine' with the naked eye in sunlight, it essentially isn't there.  You shouldn't need a microscope to see it.

The pics are out of focus, but I would look at it with care to ensure it isn't buffed.

33 minutes ago, akroorka said:

I am not too sure what you are asking here--the reaction to the folks that worked with this stuff was less than mild--deadly I would say.

That was the way----

Marble--On!!

I was asking if the glass reaction to UV was that of true Vaseline glass - or a mild reaction (which is not all that uncommon).

There are a few Popeyes made with Vaseline glass instead of typical clear.

15 hours ago, schmoozer said:

How common are sparklers that are UV? Found one in my collection just the other day.

Is it true Vaseline glass - some mild reaction elsewhere?  The former would be cool on a mint example.

Boro artist.  The signature is completely illegible.

They seem to have hit with a LOT of light to brighten the pics.