Radium as a Test for Real Diamonds
“At the approach of Radium pure gems are thrown into great brilliancy, while imitations remain dull.”
I can imagine a jeweler would be thrilled to have you bring in a chunk of radium whilst shopping for an engagement ring.
The Boy’s Second Book of Inventions. Roy Stannard Baker, 1909.
One of the one hundred and one things that Edwardians thought Radium was good for including health drinks like Radithor.