Cu₆Si₆O₁₈・6H₂O (dioptase)					Cu₆Ge₆O₁₈・6H₂O (Ge-dioptase)
P	λ(nm)	Γ(nm)	E(cm⁻¹)	Assignment	P	λ(nm)	Γ(nm)	E(cm⁻¹)	Assignment
329	935 ± 37	208	10,700	Δ_A	1000	842 ± 30	198	11,884	Δ_B + Δ_A
815	869 ± 12	208	11,507	Δ_B	1000	842 ± 30	198	11,884	Δ_B + Δ_A
1000	695 ± 7	194	14,400	Δ_E	645	698 ± 24	166	14,321	Δ_E
256	600	109	16,670	ZRS?	185	616	129	16,230	ZRS?
421	414	108	24,160	SPE?	271	462	147	21,650	SPE?
(554)	326	102	30,660	E_g	(531)	353	97	28,350	E_g
Cu₆Si₆O₁₈ (dioptase dehydrated)					Cu₆Ge₆O₁₈ (Ge-dioptase dehydrated)
P	λ(nm)	Γ(nm)	E(cm⁻¹)	Assignment	P	λ (nm)	Γ(nm)	E(cm⁻¹)	Assignment
1000	811 ± 14	158	12,330	Δ_B	1000	827 ± 14	155	12,100	Δ_B
866	668 ± 12	120	14,960	Δ_E	843	679 ± 12	127	14,723	Δ_E
492	558 ± 11	96	17,930	Δ_A	450	565 ± 12	97	17,700	Δ_A
235	441	100	22,680	SPE?	355	437	108	22,880	SPE?
(869)	330	120	30,300	E_g	(630)	357	102	28,000	E_g