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UltravioletPhotography

Lost your marbles?


Cadmium

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Went looking for something else, but found this instead. Pardon me if I have shown this before.

Some radioactive marbles. They use to put small amounts of uranium oxide in some glass, which fluoresces and also has low levels of ionizing radiation.

Here is the Blak-Ray meter measuring UV light, and a Geiger counter measuring radiation.

post-87-0-91436300-1470807233.jpg

 

post-87-0-34498100-1470807246.jpg

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I bought a handful of stones in an obscure shop somewhere out in the deserts of Nevada years ago. I was told one of them contained traces of uranium. Thanks to your post, I'm going to guess its the one on the right, in the back, which is fluorescing green under SWUV. Now I wonder what the red-fluorescing stone is?

 

 

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It is difficult to judge from a photo, of course, but the green-fluorescing moss agates at right do not look yellowish enough to my eye to attribute to uranium. The partially-hidden stone at center right would be my guess, if the assertion is true; the LWUV does show a trace of green there. My guess is that the red is one of the calcites.
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