  Sample under oil.
This 5g sample under mineral oil shows the characteristic green oxide coating, as well as some shiny surfaces. Europium is notoriously difficult to keep bright, as it oxidizes in a matter of seconds if exposed to air: This is probably about as good as one can do in a bottle like this. Shinier samples would have to be in a vacuum or inert gas filled glass ampule.
Source: Dave Hamric
Contributor: Theodore Gray
Acquired: 20 September, 2005
Price: $17
Size: .75"
Purity: 99.9%
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