[Rockhounds] Fl. marbles

[Kreigh Tomaszewski]

Dave, I think most of us lost our marbles years ago.

Kreigh



On Thursday, Apr 30, 2009, at 10:36 America/Detroit, betdav97 at aol.com 
wrote:

> Since we are on the topic of fluorescence, try some of your old
> marbles, a lot will flouresce quite nicely due to the uranium salts
> that were used to color them; some are still warm under a geiger
> counter also.
> dave
>
>
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