| Hint | Mineral |
| Grey, greasy | |
| Weathers to yellow | |
| Platey cleavage | |
| Weathers to kaolinite | |
| Stair-step cleavage | |
| Flakes of silver | |
| Magnetic mineral | |
| | Hint | Mineral |
| triangular basal section | |
| Used for fertilisers | |
| Gemstone in pink, yellow and blue | |
| Often pink gemstone | |
| Used for dating | |
| CPX | |
| Used to be called sphene | |
|