| Answer | Crossword Clue |
|---|---|
| GALENA | Principal ore of lead |
| BAUXITE | Principal ore of aluminum |
| GALENA | Lead's principal ore |
| NIOBIUM | Its principal ore is columbite |
| GALENA | Principal source of lead |
| GALENA | Ore of lead. |
| GALENA | Ore of lead |
| GALENA | Chief ore of lead |
| GALENA | Main ore of lead |
| ANGLESITE | A minor ore of lead. |
| GALENA | Lead ore that is also the name of an Illinois town |
