842 Mohs = 8.25 HRC
| Mohs | HRC |
|---|---|
| 827 Mohs | 8.11 |
| 832 Mohs | 8.16 |
| 837 Mohs | 8.21 |
| 842 Mohs | 8.25 |
| 847 Mohs | 8.3 |
| 852 Mohs | 8.35 |
| 857 Mohs | 8.4 |
842 Mohs = 8.25 HRC
1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140