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 Antique phonograph needle.
People playing antique phonograph cylinders (the kind that are played acoustically with no electronics between the needle and the speaker) care a lot about their needles. Probably this is because every time they play a cylinder, an irreplaceable historical artifact is irreparably damaged a little bit more, how much depending on what needle you're using.
Fortunately, some people are transferring and archiving the recordings. The sound for this sample is a short excerpt of a wax cylinder recording taken from the website of a person who offers to transfer wax recordings to CD in exchange for a copy of them.
In any case, the preferred material for needles is of course diamond, with sapphire a good second. But, as was very nicely explained in the letter that came with this fine needle, if you're going to use a metal needle to get a certain kind of tone, an osmium one will last much longer, and leave fewer shards of metal stuck in the grooves, than will a steel needle.
My microscopic examination reveals no joints in the metal, and Randall Anderson, the source, explains as follows:
"Yes they are all osmium. The tungsten ones usually have just a tip, or a central shaft set in brass, but the osmium ones are usually all the way. The thicker the needle the louder the tone, thus they come in soft, medium, and loud tone. The last of the manufacturers went out of business in the late 1970's. I bought out their final inventory. Only NOS (New Old Stock) exist at this point."
On the other hand, the needle is quite unmistakably attracted to a magnet, which it should not be if it were solid osmium. It might be plated, or it might be one of several osmium/iron alloys that are discussed in connection with phonograph needles.
Preliminary analysis by x-ray fluorescence spectroscopy at the Center for Microanalysis of Materials, University of Illinois (partially supported by the U.S. Department of Energy under grant DEFG02-91-ER45439) indicates that there is absolutely no osmium in this needle. Not the slightest ghost of a trace. But, this is a surface analysis only and it's possible the machine was missing the tip of the needle, so some hope remains: I plan further testing after I learn more about the x-ray beam's exact location within the sample area of the machine. What the machine did see was 60% iron, 40% nickel.
Source: eBay seller hmv@houston.rr.com
Contributor: Theodore Gray
Acquired: 12 July, 2002
Price: $9
Size: 0.5"
Purity: 0%
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Another antique phonograph needle.
This is a different brand, one that claims to have an osmium tip welded on it (see below for packaging making this claim). It's still magnetic, though without breaking off the tip it's a bit hard to tell whether the tip itself is, or whether it's just the rest of the shaft that is attracted to the magnet.
Preliminary analysis by x-ray fluorescence spectroscopy at the Center for Microanalysis of Materials, University of Illinois (partially supported by the U.S. Department of Energy under grant DEFG02-91-ER45439) indicates that there is absolutely no osmium in this needle either. Again, it could be that the osmium is only in the tip, which I may have missed, or that a plating obscured it. In this case the machine saw 57% iron, 43% copper.
Source: George (not 007) Lazenby
Contributor: George (not 007) Lazenby
Acquired: 30 August, 2002
Price: Donated
Size: 0.5"
Purity: 0%
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Still more antique phonograph needles, these in original packaging.
After he sent it but before I knew about it, I won an auction for five more osmium needles identical to the one George had sent me (see above). I photographed his and kept this set in its original packaging, though by the time you read this I may have traded one for a selenium rectifier.
Source: eBay seller startgroove@aol.com
Contributor: eBay seller startgroove@aol.com
Acquired: 31 August, 2002
Price: $17
Size: 0.5"
Purity: <50%
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 Yet a third brand of osmium phonograph needle.
Despite striking out with two different brands of "osmium" needle (no actual osmium), I remain eternally optimistic that some day I'll find one that contains real osmium. This is a brand I haven't seen before, so maybe....
I have not tested it yet, but before too long I'll know if my hopes will once again be dashed against the rocks of eBay.
Source: eBay seller 00018
Contributor: Theodore Gray
Acquired: 4 January, 2003
Price: $10
Size: 0.2"
Purity: <20%
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Real osmium.
Osmium metal is hard to get, and very expensive. In fact, it was in the very last group of elements I was able to acquire to complete my collection. It was donated by the extremely kind Max Whitby of the The Red Green & Blue Company, which sells a complete collection of elements (including this one).
Osmium and Iridium are the two densest elements in the world (they are in fact so close in density that which one is considered the densest has switched a couple of times over the years). Even though this is a quite small lump, you can feel its weight when you shake the bottle: Quite surprising. Having a large block of this would be remarkable, but the closest I'm likely to come to that is my large blocks and cylinders of tungsten, which are only about 15% less dense.
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 The Red Green & Blue Company
Contributor: Max Whitby of The Red Green & Blue Company
Acquired: 20 January, 2003
Price: Donated
Size: 0.2"
Purity: 99.95%
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Sample from the Everest Element 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 (excepted gasses) weight 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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