Investing in Europium
Europium is the most reactive of the rare earth elements. It has been used to dope some types of glass to make lasers.
Molycorp - http://www.molycorp.com/products/europium.html - Molycorp is a mining and marketing subsidiary of Chevron (NYSE: CVX) that produces europium, in addition to molybdenum and other lanthanide elements.
Metall Rare Earth Limited - http://www.metall.com.cn/eu.htm
American Elements - http://www.americanelements.com/eu.html - Europium metal, europium oxide, europium acetate, europium carbonate, europium chloride, europium fluoride, europium nitrate, europium oxalate, and europium sulfate.