https://en.wikipedia.org/wiki/File:Fluorescent_Uranium_Depression_Glass.jpg

This one looks like it's from an older game.

Nilered made videos on making it and cleaning up the waste :

https://www.youtube.com/watch?v=RGw6fXprV9U Making it
https://www.youtube.com/watch?v=7ZUqSncJ5U0 Cleaning it up