Has anyone else with a marbled McLAUGHLIN commemorative from 1972 tried this?..

For some reason I decided to put my McLAUGHLIN commemorative (mostly white with red, orange and tan streaks) under ultraviolet light (black light) and BOOM the swirls GLOW with a fluorescent appearance!!

The photo quality isn't that great but the swirls reacting to UV light is quite impressive!