  Nodules.
I don't really understand where these nodules come from, but people in China are selling bunches of them, and they are very beautiful. It think they must be electrowinning nodules (built up by electroplating), considering how similar they look to the nickel and copper electrowinning nodules I have. I'm also not sure whether they are pure magnesium or a magnesium-aluminum alloy. They feel too light to be mostly aluminum, but I'm not sure.
Source: eBay seller artgarden2005
Contributor: Theodore Gray
Acquired: 16 December, 2006
Price: $10
Size: 3"
Purity: >90%
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