| Answer | Crossword Clue |
|---|---|
| TRONA | Gray-white mineral |
| LEUCITE | White or gray mineral |
| HORNSILVER | White or gray mineral. |
| TRONA | Gray mineral |
| GALENA | Blue-gray mineral |
| TALC | Soft gray mineral. |
| ALENA | Bluish-gray mineral |
| GALENA | Soft blue-gray mineral |
| GALENA | Soft, blue-gray mineral |
