| Clue | Source | Date |
|---|---|---|
| Ore source of element #56 | Newsday | 24 May 2020 |
| Mineral also called heavy spar | Wall Street Journal | 09 Jun 2018 |
| Mineral also called heavy spar | ||
| Mineral used in paint | ||
| Mineral also called heavy spar | ||
| Crystalline mineral | ||
| Mineral used as a weighting agent | ||
| Mineral used as a weighting agent | ||
| Paint ingredient | ||
| Heavy spar. | ||
| White mineral. | ||
| Mineral. |