Lanthanum (sometimes considered a transition metal)
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Actinium (sometimes considered a transition metal)
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium
Rare Earth Elements
Elements in the Rare Earth Element Group
By Anne Marie Helmenstine, Ph.D., About.com
Samarium is one of the rare earth elements.
JKleo, wikipedia.org
This is a list of rare earth elements, which are metals. The rare earth element group includes the lanthanides and actinides.
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