Most was pre-war. The US government put a huge amount of effort into covertly redirecting uranium salts and ores for the Manhattan Project without clueing people in to the fact that they were doing something weird with it. At the time, it wasn’t really a useful element for any industrial processes other than “idk it makes glass a fun color I guess” and wasn’t heavily mined as a result.
3 points
In the 90s the US dropped regulations and some uranium glass is still made today, albeit not as large glassware pieces anymore. Despite the name and the association of uranium with radiation, uranium glass is only negligibly radioactive and totally safe (assuming they didn’t put any lead paint on it).
