Lanthanum is one of the elements you don't expect to find in big chunks. At least I don't. This 25 gram lump is more than I have of any other rare earth in pure form. It's in a very cute glass ampule that warns of vigorous reaction with water. (The ampule is filled with argon gas to prevent any corrosion.)
Max Whitby of The Red Green & Blue Company in England donated this sample. The Red Green & Blue Company is selling a periodic table collection containing smaller amounts of the same stuff, and if you want a ready-made collection of elements, that's the first place I would look.
Note that this particular sample is much bigger than what you get with the set (it wouldn't fit in the box!). See the next sample for an example of what you get with the set.
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: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 October, 2002
Text Updated: 11 August, 2007