Received some marbles as a gift. They seem a little darker than normal uranium glass but still fluoresce. The larger darker red marbles fluoresce too although it's hard to see in the
Glow Away: 10 Odd Objects Made From Uranium Glass - WebEcoist | Vaseline glass, Glass, Glass marbles
I got quite lucky at Goodwill! I found a little glass box full of uranium glass marbles! 30 of them in there, all for 99 cents! : r/uraniumglass