531.5 Mohs = 5.21 HRC
| Mohs | HRC |
|---|---|
| 516.5 Mohs | 5.06 |
| 521.5 Mohs | 5.11 |
| 526.5 Mohs | 5.16 |
| 531.5 | 5.21 |
| 536.5 Mohs | 5.26 |
| 541.5 Mohs | 5.31 |
| 546.5 Mohs | 5.36 |
531.5 Mohs = 5.21 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