Im just curious
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Radium in watches and rifles. I still own a watch with radium enamel on the hours.
Cherenkov radiation is blue, radium is green and sold in retail settings but marketed as “radioactive” which it is in some amount. Radium and Arsenic (another green) nail polish and makeup however will cause cancer. Which is why we don’t use it.
I think the most famous example is the “Radium Dress”.
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Actually one of the first uses for uranium, before we understood radioactivity was to color glassware bright green. You can still find some surviving examples.
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