| Notation | Dioptase | Ge-Dioptase |
| ΔB | 11,508 | 11,884 |
| ΔE | 14,395 | 14,321 |
| ΔA | 10,700 | 11,884 |
| g|| | 2.3601 | 2.3780 |
| g﬩ | 2.0511 | 2.0970 |
| λ|| | −504.08 | −545.53 |
| k|| | 0.608 | 0.658 |
| λ ﬩ | −346.91 | −662.63 |
| k﬩ | 0.418 | 0.799 |