Uranium glass, also known as Vaseline glass, is a type of glass that contains a small amount of uranium oxide, typically between 0.1% and 2%. This gives the glass a distinct yellowish-green color and, more notably, causes it to fluoresce a bright green under ultraviolet (UV) light. Uranium glass has been produced since the early 19th century and is often sought after by collectors. Characteristics of Uranium Glass: ...