| Answer | Crossword Clue |
|---|---|
| RAREEARTH | Oxide of cerium, yttrium, etc. |
| euxenite | rare, brownish-black mineral of complex composition, an oxide of calcium, cerium, yttrium, columbium, titanium, and uranium |
| gadolinite | a mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron |
| gadolinites | GADOLINITE, a mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron |
| RAREEARTHMETALS | Cerium and yttrium, for two |
| RAREEARTH | Yttrium oxide, for one |
