UV in Akro Silver Oxbloods

[SequoiaBET]

No pics, as I'm sure most people know these marbles. My question is, why is there a variance in how much they react to UV light? Does it tell you something about when they were made? I have 6 of them, and to the naked eye the base glass looks basically identical. However, under UV 2 of them glow intensely, 3 lightly glow, and one does not glow at all. My 2 Milky Oxblood's don't glow either, while my 2 Lemonade Ox glow intensely and my Egg Yolk Ox doesn't glow at all. Just curious as to why and what it means. Thanks!

[Chad G.]

Same here, some of my silvers glow and some don't. Although the base glass looks identical. All ade reacts to UV, lemonade, limeade, cherryade, blueberry ade.  My suspicion is the silver oxbloods are just made from a different batch of glass that had Uranium in it, thus the reaction. I don't believe I've ever seen an egg yolk ox that reacted. ??  But there is an exception to every rule especially when talking about marbles, somebody probably has an egg yolk ox that reacts. The silvers that do react tend to be worth a tad more $$ since it is a rare occurrence. Agree, Never had a milky that reacted either.

[SequoiaBET]

Thanks for the reply. Sounds like you see the same thing in your marbles. I'm glad I ended up with so many that react- I didn't check for that when I bought them.

[Parmcat]

I think it was just what glass they had available at that specific time.  I think they also used to recycle glass, so one batch may have uranium, while the next one didn't.

That part of what makes this hobby so very cool