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Like its neighbor mercury, thallium is toxic. In fact, it's quite a bit more acutely toxic than mercury, and it's even been used both as a rat poison and a murder weapon. (Arsenic is no good because the symptoms are too well known. The world's first (and perhaps only) thallium murder was a great mystery because no one recognized the symptoms for a very long time.)
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0.1mm foil wrapped into small cylinder, 99.99%
This small sample was kindly donated by George (not 007) Lazenby, who saw the slashdot discussion. It came in a lovely little plastic vial taped shut with a warning attached not to open it, and a MSDS on Thallium. We haven't opened it.
George got this and the other samples he donated at a surplus auction of his highschool. It seems he was the only one there who appreciated the erbium foil. This sample and the others he sent had been donated to the school by a former student who worked at NIST (National Institute for Standards and Testing), where they had been used as x-ray calibration standards. This means they are probably very pure.
Source: George (not 007) Lazenby
Contributor: George (not 007) Lazenby
Acquired: 24 May, 2002
Price: Donated
Size: 1"
Purity: 99.99%
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One gram lump
This whole business of selling strange, rather toxic or otherwise dangerous elements on eBay strikes me as quite peculiar. But it sure is fun.
Source: eBay seller quartzpegmatite
Contributor: Theodore Gray
Acquired: 10 January, 2003
Price: $10.50
Size: 0.2"
Purity: 99.9%
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Sample from the RGB Set.
The Red Green and Blue company in England sells a very nice element collection in several versions. Max Whitby, the director of the company, very kindly donated a complete set to the periodic table table.
To learn more about the set you can visit my page about element collecting for a general description or the company's website which includes many photographs and pricing details. I have two photographs of each sample from the set: One taken by me and one from the company. You can see photographs of all the samples displayed in a periodic table format: my pictures or their pictures. Or you can see both side-by-side with bigger pictures in numerical order.
The picture on the left was taken by me. Here is the company's version (there is some variation between sets, so the pictures sometimes show different variations of the samples):
Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Price: Donated
Size: 0.2"
Purity: 99%
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Sample from the Everest Set.
Up until the early 1990's a company in Russia sold a periodic table collection with element samples. At some point their American distributor sold off the remaining stock to a man who is now selling them on eBay. The samples (except gasses) weigh about 0.25 grams each, and the whole set comes in a very nice wooden box with a printed periodic table in the lid.
To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical order.
Source: Rob Accurso
Contributor: Rob Accurso
Acquired: 7 February, 2003
Price: Donated
Size: 0.2"
Purity: >99%
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  Large ingot.
This ingot is part of a batch Max Whitby got from China for use in his company's element sets and to use in the line of museum displays we are building together. It's a great example of the kind of sample you can get way cheaper if you can buy in bulk from the original suppliers.
I chose this sample to represent its element in my Photographic Periodic Table Poster. The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of.
Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 20 December, 2003
Price: Donated
Size: 1.25"
Purity: 99.99%
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