Older Fiesta dinnerware (especially in red) is quite famous for having Uranium in the glaze prior to World War 2, which was then confiscated for the war effort.

Older Fiesta dinnerware (especially in red) is quite famous for having Uranium in the glaze prior to World War 2, which was then confiscated for the war effort. I believe they then returned to using Uranium in the glaze after the war for a few years. You can see one being checked with a geiger counter here: https://www.youtube.com/watch?v=jmDKbVUbsnk&t=394s https://www.youtube.com/watch?v=jmDKbVUbsnk&t=394s [EDIT] This is covered in some detail on the wiki page: https://en.wikipedia.org/wiki/Fiesta_(dinnerware)#Radioactive_glazes https://en.wikipedia.org/wiki/Fiesta_(dinnerware)#Radioactiv...