Looks like just a mass-market crystal tumbler. Sometimes what you see is the glass simply reflecting the blacklight...not actual glowing from uranium oxide content. Also, the "blacklight test" does not prove age...much of the reproduction glassware that hit the market in recent years is the vaseline color and it also glows fiercely under blacklight. Basically, if they could do it 100 years ago, they can do it today.
Looks like just a mass-market crystal tumbler. Sometimes what you see is the glass simply reflecting the blacklight...not actual glowing from uranium oxide content. Also, the "blacklight test" does not prove age...much of the reproduction glassware that hit the market in recent years is the vaseline color and it also glows fiercely under blacklight. Basically, if they could do it 100 years ago, they can do it today.
Vitreophilus 2 months ago
Your glass appears to be just plain lead crystal. Most lead crystal glasses do exhibit a blue tint.
FissionableFusion 2 years ago
You're probably right, I went through all of my glasses and found a few others that did as well, darn...
amethyst8teen 2 years ago
test
DURound 2 years ago
My geiger counter has something wrong with the probe plug in, I ordered another probe and it still isn't working.
amethyst8teen 2 years ago
I do not think it's cobalt glass. Cobalt glass is dark blue in daylight.
I think Gold added to glass makes a blood red color in daylight.
Uranium makes it look a kind of pinkish green and it fluoresces green in UV.
Don't know what fluoresces blue. Maybe tungsten or calcium
DURound 2 years ago
I'll have to try it, but I don't have any other blue depression glass to check it with.
amethyst8teen 2 years ago
I wonder what additive makes it blue.
DURound 2 years ago
Me too!
amethyst8teen 2 years ago