From  http://www.espi-metals.com/images/holmium.jpg

Welcome to the world of Cleve, where in 1878, the element Holmium was discovered. Since 1878 however, Holmium still remains as much a mystery. It would seems fitting that with no commercial uses and the strongest magnetic field of any naturally occurring element, Holmium would be referred to as Element X for later half of the 19th Century.  Please explore the many facets of Holmium.