The significant feature of Uranium glass (completely avoiding the American use of the term "vaseline" which is originally merely a descriptive expression) is that it is radioactive.
It emits (weak) gamma radiation, it will make a geiger counter go noisy, it will scintillate a scintillation counter.
Uranium glass beads have been known to set off the alarms when worn by a visitor to Sellafield.
Custard and jadeite are again descriptive terms for opaque sorts of glass, custard being whitish or yellowy, jadeite being greeny; thay may or might not contain Uranium.