| Rating | Solver | Clue |
|---|---|---|
| EMERY | Very hard mineral | |
| CHRYSOBERYL | A mineral, found in crystals, of a yellow to green or brown color, and consisting of aluminia and glucina. It is very hard, and is often used as a gem. | |
| BUCKETDOWN | Rain very hard | |
| STRIVE | Try very hard | |
| QUARTZ | Hard glossy mineral | |
| SWEATBLOOD | Work very hard | |
| SLAVING | Working very hard | |
| IRESTONE | Any very hard rock. | |