Alan

I never wrote anything that referred to a "specific pattern" or a "spiral". I also did not refer to a "patent". Nor did I refer to all of the other external machinery, "spinning independently", "Barker", whether he worked for Akro or not etc etc that you are seemingly referring to.

First one is a modern frit marble. The rest appear to be game marbles. The last one is out-of-focus and I won't guess at it.

Perhaps you are thinking that the colors you see are reactions, when some or most of them are a combination of inner reflections and refractions through multi-colored transparent glass colors. The blue/purple you are seeing is reflection of the UV light.

It appears to me to be a machine made.

Those pictured aren't mine - they're Roger Hardy's. I have two - and they are as individually unique as Roger's.

Its a machine made. Try not to look at defects as a "pontil".

I suggest not thinking of spinner cups as a predictably standard item. They were made of graphite and delivered to the factory as smooth blanks. The notches that "catch" the glass and get it spinning are then hand-carved by the machine's operator. Each spinner cup is unique. They wore down from the hot glass and had to be replaced with a new one. So how much spin was put into the glass was highly variable because of these factors. A worn spinner cup put less spin on the glass than a fresh one. A deeply carved set of notches imparted more spin. Additionally - the glass was often in flux due to batch temperature, weather etc. So what flowed from the pot could have different density. So there are few conclusions that can be reached when those factors were always changing.

Both ways. The heavy oxblood was made on purpose. The trace, thready oxblood pretty much chemical coincidence.

Also notice the half-moon remains from from impact moons. The whole thing yells "polished".

There were games that involved rolling or "bowling" that were played in the home. Hence Carpet Bowls of considerable size. I know that some big handmades I have bought were found in sewing kits used as darning aids.

Kids NEVER allowed an outsized marble anywhere near 1" in a game of marbles. Almost all kids played with 5/8", which is why they are the most common size. Older kids might play with < 3/4", but at the older age they generally moved on from marble playing. Also keep in mind that 3/4 - 1" dia. was too large for most kids to shoot properly due to the size of their hand. A larger marble has a real advantage over players with smaller marbles. At the marble tournaments I have been to, all kids played with 5/8". Also, IIRC, true agates were not allowed in games using glass marbles.

MK

No.

Very modern machine-made frit marbles.

Looks like a combination of dull shears and cold rollers. Reminder: Marble-making wasn't rocket science. It was a crude, sub-cent per marble process.

I'm confused.

Its actually chromed stainless steel by artist Zhan Wang.

Why is this in a marble-specific forum?

How did you identify it specifically as that?

Its not glass.

Yes

As others noted - a caliper. Use fractions please.

Run away from that seller. I DO love how all photos are mysteriously out-of-focus. And NO returns. Whats not to like!

Machine made with crud in the glass. No "Lutz". If you look for "Lutz" etc - you'll find it in places that it isn't.

Looks like a normal bead shoved into an optic mold device. Anyone can make a clone of it tomorrow. My first torch experience was in a Kate Fowle bead class.