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
GLOWING Clear Uranium Glass Marbles Vaseline Glass Marbles UV Blacklight Reactive Lot Of 10 #7474 | Auctionninja.com
Vaseline glass marbles found thrifting : r/uraniumglass