Uranium glass is glass which has had uranium usually in oxide diurnate form, added to a glass mix before melting for colouration. The proportion usually varies from trace levels to about 2% uranium by weight, although some 20th-century pieces were made with up to 25% uraniumThe normal colour of uranium glass ranges from yellow to green depending on the oxidation state and concentration of the metal ions, although this may be altered by the addition of other elements as glass colourants. Uranium glass floresces bright green under a black (ultraviolet) light. .
Uranium became scarce after the 1940s as it was now being used for weapons of war. U.S. production of uranium glasses ceased in the middle years of WW2 because of the government’s confiscation of uranium supplies for the Manhattan Project from 1942 to 1958.





















