| |||||||||||||||||||
| |||||||||||||||||||
Larger | Spin | 3D |
Element coin. Dave Hamric sells element samples under the name Metallium. He's developed a line of coins struck out of various common and uncommon metals: They are quite lovely, and very reasonably priced, considering the difficulty of creating some of them. Here is the back side of this coin (click either picture to see it larger):  Click the Sample Group link below to see many other coins made of various elements, or click the link to his website above if you want to buy one like this. Source: Dave Hamric Contributor: Theodore Gray Acquired: 24 December, 2007 Price: $22 Size: 0.75" Purity: >99% Sample Group: Coins |
||||||||||||||||||
Larger | Spin | 3D |
Technical grade beauty. I've never seen antimony this pretty, I had to double check that it wasn't actually germanium or silicon, which it strongly resembles. But no, it's actually technical grade (meaning not overly pure) selenium crystal. Source: Ivan Timokhin Contributor: Ivan Timokhin Acquired: 4 September, 2007 Price: Donated Size: 1.25" Purity: 99% |
||||||||||||||||||
Larger | Spin | 3D |
Poster sample. This is the same sample as the one from the RGB set above, as it appears 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: 25 January, 2003 Price: Donated Size: 0.2" Purity: 99.5% |
||||||||||||||||||
Larger |
Rectifier marketing brochure. This is a great example of marketing. Basically, selenium rectifiers are really not that good. But, they were better than the alternative vacuum tube technology, so a company that made them got the idea that people could go around replacing burned out rectifier tubes with selenium rectifiers. This brochure is full of detailed technical information about how to do this for particular kinds of tubes, certain brands of radios, etc. It even includes a price list, which indicates that these things cost about a dollar, which was of course worth a lot more then than it is now. A modern silicon rectifier that works far better can be had for a few pennies: As part of an integrated circuit the price of an individual rectifier would be essentially zero. Source: eBay seller nrankscs Contributor: Theodore Gray Acquired: 3 January, 2004 Price: $4 Size: 11" Purity: 0% |
||||||||||||||||||
Larger |
Rectifier. Before the invention of silicon and germanium rectifiers, selenium was used to convert AC to DC. It worked only marginally well compared to modern silicon components. Source: eBay seller radiocorner Contributor: Theodore Gray Acquired: 25 November, 2003 Price: $10/24 Size: 2" Purity: >90% |
||||||||||||||||||
Larger |
Old light meter. This is one of a batch of three old photographer's light meters I got on eBay: From the paperwork that came with them, it looks like people sent them in for repair at a certain shop, paid for the repairs, but never claimed the meters. That was 30 years ago, so I guess the shop can be forgiven for giving up hope on them. The neat thing about selenium light meters is that they require no batteries: The selenium sensor works like a photocell to generate its own electricity. This meter, having been repaired only 30 years ago, works perfectly. Source: eBay seller beaglemania2 Contributor: Theodore Gray Acquired: 15 August, 2003 Price: $7 Size: 4" Purity: <10% |
||||||||||||||||||
Larger |
Photocopier drums. These are old scrap photocopier drums sold for their aluminum value. I got them, however, for their selenium content. Selenium compounds are photo-sensitive, and form the basis of all modern photocopier (Xerox) machines, as well as all laser printers. The drum is charged with static electricity and then exposed to the image to be reproduced. Where light strikes the drum, the static is dissipated. Then the drum is dusted with toner, which sticks only where there is static. Source: Marco's Scrap Metal Contributor: Theodore Gray Acquired: 15 August, 2003 Price: $1 Size: 12" Purity: <10% |
||||||||||||||||||
Larger | Spin | 3D |
Pretty cast ingot. Dave Hamric sells elements on his website and on eBay. He donated this beautiful cast ingot of selenium as an example of the sorts of things he can supply. Click the source link for more information about his offerings. Source: Dave Hamric Contributor: Dave Hamric Acquired: 9 July, 2003 Price: Donated Size: 1.5" Purity: >99% |
||||||||||||||||||
| |||||||||||||||||||
Larger |
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% |
||||||||||||||||||
Larger | Spin | 3D |
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: 99.5% |
||||||||||||||||||
Larger | 3D |
Hunks. These are bigger hunks of selenium from Canada, about 20 grams each. They are nondescript as elements, but do illustrate what a wonderful place eBay is to deal with. The first one failed to arrive after a while, so I emailed the seller asking if it had been sent. He assured me it had, but offered to send another if it didn't arrive soon. It didn't, and he did. Naturally not long after that, the first one arrived in a torn, dirty envelope postmarked almost a month before that looked like it had been opened, but still contained its lump. The replacement arrived the next day. People on eBay are just the nicest people you'd ever want to meet. Source: eBay seller kingendymion Contributor: Theodore Gray Acquired: 27 September, 2002 Price: $26 Size: 1.5" Purity: >99% |
||||||||||||||||||
Larger | 3D |
Lumps. These are smooth lumps that look like they've been melted. Click the source link for an interesting story about where this sample came from. Source: Tryggvi Emilsson and Timothy Brumleve Contributor: Tryggvi Emilsson and Timothy Brumleve Acquired: 6 September, 2002 Price: Donated Size: 0.75" Purity: >99% |
||||||||||||||||||
Larger | 3D |
Rectifier. Before the invention of silicon and germanium rectifiers, these were state of the art. Despite being called "miniature" rectifiers, they are huge by current standards! Source: Charles Cowie Contributor: Charles Cowie Acquired: 9 September, 2002 Price: Donated Size: 2.5" Purity: >90% |
||||||||||||||||||
Larger |
Small button 99.999%. Kindly donated by David Franco, who sent many elements after seeing the slashdot discussion. Source: David Franco Contributor: David Franco Acquired: 17 May, 2002 Price: Donated Size: 0.1" Purity: 99.999% |
||||||||||||||||||
Larger | Spin | 3D |
SnSe sample. Another strange compound from Ethan. No idea what it was supposed to be good for. Source: Ethan Currens Contributor: Ethan Currens Acquired: 8 May, 2007 Price: Donated Size: 1" Composition: SnSe Sample Group: Ethan Currens Group |
||||||||||||||||||
Larger |
Native selenium. (External Sample) Huge lump of elemental selenium, naturally occurring. Location: The Harvard Museum of Natural History Photographed: 2 October, 2002 Size: 18 Purity: >90% |
||||||||||||||||||
| |||||||||||||||||||
