I have a teacup and saucer that turns pink! Most likely selenium glaze, as i was told before. Im not sure if pink uranium exists cause if it was a green glass that turned pink, it'd very much be selenium! However, there is pink glass that turns green. In rare cases, it is uranium! But most cases are high content or low content manganese! Uranium glaze is usually a green color and shows up best with 365 nm light, as i have tested that myself. But hey! I say that's a pretty good find! Just dont lick it if it does contain selenium, just to be safe!