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Rhodium is a very common plating for inexpensive jewelry, because it is extremely shiny and tarnish resistant. It's actually a very expensive metal, but you only need a microscopically thin layer to make something look beautiful, so it can be used for even very inexpensive items.
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  Rhodium plated Ring with Tanzanite.
Ed got this from eBay. Maybe some day he'll get a solid rhodium ring, but he probably won't donate it to my table.
Source: MrValue Jewelry
Contributor: Ed Pegg Jr
Acquired: 20 July, 2002
Price: $10
Size: 0.75"
Purity: >90%
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1cm wire.
A very small sample indeed, but since it's from David Franco, it is of course of the highest purity.
Source: David Franco
Contributor: Ed Pegg Jr
Acquired: 16 August, 2002
Price: $1
Size: 0.4"
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
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: 99.8%
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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 gases) 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
Text Updated: 29 January, 2009
Price: Donated
Size: 0.2"
Purity: >99%
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Museum-grade sample.
In early 2004 Max Whitby and I started selling individual element samples identical or similar to the samples we use in the museum displays we build. These are top-quality samples presented in attractive forms appropriate to the particular element. They are for sale from Max's website and also on eBay where you will find an ever-changing selection of samples (click the link to see the current listings).
This bottle contains about 50 grams of arc-melted buttons made in Max's reduced-pressure argon-arc furnace.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 24 February, 2004
Text Updated: 11 August, 2007
Price: See Listing
Size: 2"
Purity: >99%
Sample Group: RGB Samples
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Reed switches.
These reed switches have rhodium-plated electrical contacts. I don't know why rhodium and not gold, a more common contact material. Reed switches work by opening or closing when a magnet is moved close to the sealed glass tube. These are normally closed switches.
Source: eBay seller virtualvillage-usa
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009
Price: $0.30
Size: 1"
Purity: 98%
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Questionable medallion.
This commemorative medallion was advertised as being made of an alloy of 1/3 rhodium and 2/3 nickel. Very unlikely, but I haven't had it tested yet, so I'm not going to make a definitive statement yet.
Source: eBay seller alpha-omegaman
Contributor: Theodore Gray
Acquired: 11 March, 2009
Text Updated: 12 March, 2009
Price: $107
Size: 1.25"
Purity: <0.01%
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Rhodium-plated Sacagawea coin.
What a peculiar thing: Just for fun, someone with a rhodium plater decided to rhodium-plate an ordinarily gold-colored Sacagawea dollar coin and sell it on eBay. Curiously, I decided to buy it, for 50% over face value!
Source: eBay seller jeffshobbies
Contributor: Theodore Gray
Acquired: 11 March, 2009
Text Updated: 17 March, 2009
Price: $1.50
Size: 1"
Purity: <0.1%
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