| minerals listed by hardness | 0.79 | 0.6 | 5603 | 27 | 97 |
| list of rocks and minerals by hardness | 0.87 | 0.4 | 1249 | 38 | 84 |
| what is hardness for minerals | 0.55 | 0.3 | 1638 | 29 | 15 |
| hardness of minerals chart | 0.5 | 0.1 | 8345 | 26 | 67 |
| hardness level of minerals | 1.02 | 0.7 | 8667 | 26 | 61 |
| metals listed by hardness | 1.43 | 0.5 | 3165 | 25 | 70 |
| rocks and minerals hardness | 1.92 | 0.7 | 5356 | 27 | 39 |
| physical properties of minerals hardness | 1.12 | 0.2 | 82 | 40 | 96 |
| hardness definition in minerals | 1.56 | 0.9 | 1954 | 31 | 45 |
| hardness scale of minerals | 1.24 | 0.4 | 427 | 26 | 85 |
| hardness science definition minerals | 1.89 | 0.1 | 9013 | 36 | 76 |
| what mineral has a hardness of 10 | 0.4 | 0.7 | 990 | 33 | 54 |
| what mineral has a hardness of 6.5 | 1.42 | 0.7 | 9117 | 34 | 54 |
