  Nice lump.
Dave Hamric sells elements on his website and on eBay. He donated this beautiful chunk of ytterbium as a sample to show the sorts of things he can supply: If you need some rare earths, contact him or check out his eBay auctions.
This looks like distilled metal, probably of high purity, probably from China.
Click the source link for more information about his offerings.
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: Dave Hamric
Contributor: Dave Hamric
Acquired: 9 July, 2003
Text Updated: 4 May, 2007
Price: Donated
Size: 0.75"
Purity: >99%
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