rareearth No common ground - it's elementary Element class including cerium Motown band of the '70s Metal such as cerium Erbium, e.g Element class including yttrium Element class including scandium Monazite, e.g. Kind of element Oxide of cerium, yttrium, etc. Band with the 1970 hit "Get Ready" Terbium or thulium Oxide of cerium, yttrium, etc Oxide of a lanthanide