Would be an interesting one to hold in hand, to see if one could trace a double ingot joining line around the whole marble. And to see if one could identify definite pelt-like ribbon combinations, preferably two complete pelt-like ribbon combinations of course.
It all seemed pretty on topic to me, since what we have here is a marble with traits of both the Master Tiger Eye and the Vitro Tri-Lite, so rolling out examples of each for discussion is what we hope people can do.
This is one of my favorite topics.
Here's some Master advertising from different decades with a variety of names.
These two are scanned from American Machine-Made Marbles. I have "1951 or later" on the first and "1963 or later" on the second.
I get pretty big images by clicking three times.
Vacor seems right for that size. Not aware of anything else it could be. I don't see it on Billes-en-Tete, but I suppose it's possible that there are varieties which didn't make it to Billes yet.
Or how big do those Chinese ones get which look like Vacors?
Yup, that's the "vibe".
When I was trying to figure out Master tiger eyes, people would talk about a potato chippy structure. Took me awhile to see what they were seeing. Now maybe I see it too much! But, yeah, that's the vibe I was picking up.
I think a good chance of it being Vacor. The bubble pop would be consistent with that.
Here are three I have in my files, two with bubble pops.
The first one has no bubble pops visible but I have a liking for it because I know it came from a Vacor assortment bag, from before the named bags started becoming a big thing.
Here's the Tricolor Agates box which came into the discussion on Facebook. From a Morphy auction, but through a different website, so I couldn't get a bigger photo in my brief attempt.
And here's a similar more patchy one that I have.
And my apologies to Ben for being so late in getting to this thread. Thanks for the tag, @William
You are asking the question in a perceptive manner. At least part of the red seems translucent, so that would not be oxblood. But I couldn't swear that none of the red is oxblood. Hard to say. I'm leaving the door open.