Alan

Pelt - in classic colors for the type.

Its a banded swirl. I don't see any faceting.

It is a Divided core. I can see light between core color bands.

I am leaning Heaton, not Ravens.

"Half and half" seemed to suggest an accepted marble name. Which (to me) suggested the long-established huge Akro Orange and Blue patch by the same name. Granted, that name goes back ~24 or so years before it was corrupted by an inexperienced Akro-naming person.

"Half and half" what?

Machine made. A bit too far out of focus to ID.

Its just a flaw. Try to not think 'pontil' when you see something odd in glass texture.

Its damage.

Keep in mind that some glass colors (like white) REFLECT UV energy. That reflection (or perceived color shift) doesn't mean that the glass is UV reactive.

Its too out-of-focus to make out. Maybe a bubble.

These are some nice handmade keepsakes. The Indians (pic 5) are quite nice.

Looks like an fairly standard Akro corkscrew. I haven't heard of "Signature", and I'd probably let that term go.

I suggest that you try for photos in focus - instead of big closeup shots than end up the size of a soccer ball. I know its the fad these days to have huge photos (I can't explain why), but focus is more important than size. Learn how your camera or phone does manual focus. Make sure your lens isn't so close to the subject that it can't focus.

Vacor

Fantasy bag.

One starting point is learning when a manufacturer was in the marble business.

Pic?

Modern lampwork. Moretti glass.

Yeah - it looks modern lampwork. It would be more recognizable if in-focus.

Not German, but too out-of-focus for me to tell. Maybe Akro, possibly Vacor.

The problem with the "End of Cane" idea is that it doesn't benefit from a working knowledge of cane-cut marbles and the variables in trimming the cane in preparation for the next cut or a hurried marble-maker. In the final analysis - it a cane-cut marble. The construction of cane, pulling it, the opacity of the rods, how much the cane was pulled (decreasing color density), how heat was managed between cuts.... all this affects the appearance. I think it better not to hope that a marble is a special kind/meets some special nuanced definition. There are a lot of assumed, but incorrect, beliefs on cane-cut marbles. Words are used to describe them that cause folks to believe in concepts that simply aren't accurate.

Quartz and glass have different melting points, and therefore different coefficients of expansion (COE). (Yes - you can make a "glass" from quartz). Attempts to mix the mineral quartz with glass (two fairly different melting points) will result in internal stresses as the glass cooled. Those internal stresses are what cause annealing fractures.

Like several other words used in the hobby, "aventurine" is misused and abused. "Aventurine" is a mineral - a form of quartz. The reflective flakes in glass marbles are NOT aventurine, despite how people have come to dream of it as a rare substance. Those flakes are excess colorant or chemical precipitate from chemical reactions.

They have no individual "names", and I think it is best kept like that. The naming fetish has gone a bit far.