Found this: Light Yellow or Canary uranium glass, often called "Vaseline glass," is primarily colored by uranium oxide, while green uranium glass may contain additional elements like iron to achieve a green color.
"Yellow uranium glass, often called Vaseline glass, is generally considered a brighter glow under UV light and is highly sought after by collectors."
The marble looks like it's glowing in normal light on the picture except for the UV example.
A marble dealer said they are harder to find and other dealers never heard of them. .66 is the size. I think I might of seen a very very old picture of 3 of them a long time ago.
