490.5 Mohs = 4.81 HRC
| Mohs | HRC |
|---|---|
| 475.5 Mohs | 4.66 |
| 480.5 Mohs | 4.71 |
| 485.5 Mohs | 4.76 |
| 490.5 | 4.81 |
| 495.5 Mohs | 4.86 |
| 500.5 Mohs | 4.91 |
| 505.5 Mohs | 4.96 |
490.5 Mohs = 4.81 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