I found this website that had some useful information:
http://nature.berkeley.edu/classes/eps2//wisc/Lect10.html
And here:
http://nature.berkeley.edu/classes/eps2//wisc/L10c1.html
If their information is correct, the radioactivity is very short-lived.
Charlie
On Thu, Feb 24, 2011 at 9:48 AM, SwissPace <ian@xxxxxxxxxxxxxxxx> wrote:
> From my web searching I believe this is correct but if there are any
> impurities in the topaz they can become radioactive. I don't want to
> take any risks and have been pondering of late why so many young women I
> have know have died in their 40-50's and wonder if it could be related
> to such jewellery ( of course it could be the alchohol) - yes I know I
> think too much.
>
> As a doctor's assistant my wife takes X-rays as part of her tasks so we
> have access to the film and development of such and she also has to wear
> a detector badge which we considered leaving it next to for a month. I
> was just wondering if there was a better method.
> > Another thing too, and I'm sure someone more knowledgeable will
> correct
> > me if I'm wrong, but I've always been under the impression that exposure
> of
> > inert, inorganic material to ionizing radiation does not make it
> > radioactive. It may induce chemical changes (hence the color change of
> > precious stones) but does not convert it to a radiative material. To do
> so
> > the object must be coated or impregnated with another radioactive
> substance.
> >
>
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