I don't think the base color matters. The striping colors are spot on, IMO, and I'm sure they put the same designs on different base glass. - check out the guinea imitations on amber and clear, for instance. The bottom line is that I don't think it's a Pelt. But then I have never had a marble like it in hand and I have never seen a similar colored MCSs on an amber base so it might be wise to just ignore me. 🙂
There are a number of different colorants that will fluoresce and, as I said earlier, what you see depends on the specific fluorophore, it's chemistry as interacts with other compounds, the wavelength and intensity of light you use to excite it, and how you perceive the visible wavelength of light it emits. And AFAIK not all of the glass that any particular company used fluoresces.
I hope you have a strong background in chemistry and physics if you plan to go too far down into the fluorescence rabbit hole but, either way, I wish you well in your studies. 🙂
According to the site you should be able to get 5,000 of them for about $550 + S&H.
Have you compared the colors on that first one to the marble you posted yesterday - they look pretty similar.
Ravenswood made some similar ones with red but I have not seen similar with orange. I have seen pretty similar marbles in old Champion mesh bags though. @wvrons has seen mine and didn't recognize it as Ravenswood either. And that sort of "splitting" of the white striping glass is a fairly common Champion trait too.
It's fun, for sure, and it can be useful for ID in some cases, but it is not too uncommon and almost every company made some marbles that glow in one way or another.
There are some old DuaLites that are basically just a white patch on clear but there is just a touch, and I mean a tiny bit, of color on the bottom side of the patch and it makes it look like the base is colored. I think I've seen 3-4 different colored ones. I think it was a genius way to save money since, of course, the colored transparent glass would be more expensive to produce than clear.
Navarre, Barberton, et. al, MFC, CAC, Akro, Peltier, Ravenswood, Alley, I think Vitro, and maybe others made their own glass in the early years, mostly up to the early-mid 40s (WWII era).