Uranium Marbles
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Vaseline glass contains small amounts of uranium to give it the yellow color. You can find these kinds of marbles all over eBay from several different sellers. These two register just barely on our Geiger counter. The sound for this sample is from the Geiger counter. The marbles are stored in the Hot Box. See below for another set of marbles with a rotatable image.
Source: Ed Pegg Jr
Contributor: Ed Pegg Jr
Acquired: 24 July, 2002
Price: Donated
Size: 0.5"
Purity: <5%