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Answer for the clue "A mineral that is a source of rare earths ", 9 letters:
ytterbite

Alternative clues for the word ytterbite

Word definitions for ytterbite in dictionaries

WordNet Word definitions in WordNet
n. a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium [syn: gadolinite ]

Wiktionary Word definitions in Wiktionary
n. (context obsolete English) gadolinite: a black, vitreous mineral consisting primarily of silicates of various rare earths including ytterbium