Alan

I don't see the definitive clear (of which there should be quite a lot) and the whispy white.

Most vintage marble manufacturers had product lines. Those product lines were documented in sales brochures for retailers to order from. They were also represented in Salesman's Boxes that were used for retailers to see and order from. Retailers knew what sold and what they wanted to offer buyers. Manufacturer production aligned with orders (mostly). Jabo and SMM didn't run that way. Lets focus on Jabo investor runs, since they are what you likely have most of. Investor runs. Those run participants decided what dollar amount they wanted to spend on glass and in most cases, what "experiments" they wanted to do (usually more costly glass additives). Of all conversations I have had, I don't know of investor run intentions of producing marbles of a specific appearance, although goals of oxblood, transparent colors etc existed and glass was ordered by Dave M. to that preference. Keep in mind that dialing in the glass pot to specific intended colors at the rollers is a tricky thing subject to several variables, weather and glass pot age and condition not being the least of them. Dave M was a skilled and experienced guy to make those adjustments based on what he was seeing. I consider variation in an investor run to be the norm. I've never heard it said that they wanted or expected to get consistency in the multi-day run. Variation was a plus. I'll note that there is a term that was used at the time of Jabo investor production known as a "tank wash". While the concept is real in the business, the reason for its use in investor run really has nothing to do with clearing a glass pot for a new batch. Shifting: Jabo "Classics" (5/8") pre-dated investor runs IIRC. See this link for more on the valued work that Michael Warnelis did for the hobby piecing together like Classics into incredible and well-priced Jabo Classics boxes. Thank you Mike. https://marbleconnection.com/topic/23863-michael-warnelis/ Jabo investor runs represented a first opportunity for collectors to have a hand in making marble towards their appearance goals. I'll defer to others that may want to post details on SMM. I say: "Collect what you like". I wouldn't think too much about whether marbles from a 24-hour run are consistent. They won't be. But the variation is their strength, not their weakness. It may make us research more, look at the glass more closely and think about the diversity. Those are good things.

Don't think of a glass pot as a perfect, singular and constant source. Marble making was/is an incredibly cheap, mass production process. Variations always occur.

Annealing fractures in each photo. I'd walk away.

Mica can be found in small (and occasionally, large) flakes embedded in minerals. Large flakes in other minerals are hard to find, at least where I hike. More often, its found in flat, relatively thin multi-layered flakes. Most often silvery, its uncommonly found (by me) in dark, almost black form. Due to its very thin layers, it is usually fragile when found alone. Mica in thin layers:

That isn't mica. Mica comes in very thin sheets, most often layered. Sometime silvery, sometime nearly black (which wouldn't be used in marbles). I have quite a lot of it from hiking in the mountains. I'll take pics for you tomorrow in the sun.

Yes

I'm referring to commercial batch product. Like Spruce Pine. If anyone has evidence to the contrary, I'm ready to learn.

A "Chalkie" is just marbles run with slaggy scum in the glass. A batch defect that would normally have been corrected. Somehow folks started to think they were a type of their own at some point. I see your point about the reflection. I'd like to see it with less light at the termination point, if possible. I *think* it might be something older (or not).

Thats oven brick particles. It can't be batch, because vintage makers didn't use batch. Mica looks quite different.

Not Akro for me.

Champion Furnace with the typical annealing fractures.

It appears to be a flopover ingot, so its weird. I'm leaning CAC Snotty due to the glass density and motion.

Anemic Vitro.

They were simply in a hurry. They finished off the shear point any fast way they could. What was needed was a function of how much the cane cooled in the cup by the time the shear was made. More cooling = more work/time needed.

That doesn't appear to be 'aventurine'. I'll go out on a limb and say Vacor.

Pretty interesting all the same. I've never heard of it. I looked it up and its part of the 1940 movie promo.

Pic of the Green Hornet?

I'm guessing that the one on the right is not a transparent base.

Banded Lutz. Pretty rough condition - and lutz collectors rarely want them in this condition. Est. maybe $25 on a good day.

+1

Kids put marbles in a frying pan and fry them over heat. The rapid glass expansion fractures the marble. Most of the time it holds together unless shocked by play or heat/cold.

1. Need to see the cut line 2: Looks like a fried cat's eyes 3. Plastic - too many in one pic to easily respond. Top are Cats eyes. Solids are game marbles. 4. Fried 5. Asian 6. Cats eye 7. Clearie 8. Prob modern 9. Cats eye