| Clue | Source | Date |
|---|---|---|
| Cassiterite etc | The Telegraph Cross Atlantic | 03 Jul 2026 |
| Sources of element #50 | Premier Sunday | 14 Dec 2025 |
| Some mine finds | ||
| Mined materials that may become cans | ||
| Cassiterite et al. | ||
| Rocks that are sources of element #50 | ||
| Cassiterite and stannite, e.g. |