Fig. 1. “Edison” pearls, dyed “Edison” pearls, Seawater pearl and dyed Seawater pearl samples

Fig. 2. The luster of deep purple, dyed purple, orange, dyed yellow “Edison” pearls and golden seawater pearl, dyed golden seawater pearl

Fig. 3. Surface characteristics of “Edison” pearls and dyed “Edison” pearls

Fig. 4. The fluoresces of white, orange, dyed yellow “Edison” pearls, golden seawater pearl and dyed golden seawater pearl
(a): LW; (b): SW

Fig. 5. The infrared spectra of “Edison” pearls samples

Fig. 6. The UV-Vis absorption spectra of pink-purple “Edison” pearls

Fig. 7. The UV-Vis absorption spectra of orange “Edison” pearls

Fig. 8. The UV-Vis absorption spectra of white, pink-purple, dark purple and dyed purple “Edison” pearls

Fig. 9. The UV-Vis absorption spectra of white,orange and dyed yellow “Edison” pearls

Fig. 10. The UV-Vis absorption spectra of orange, dyed yellow “Edison” pearl, golden Seawater pearl and dyed golden Seawater pearl

Fig. 11. The UV-Vis absorption spectra of dyed black “Edison” pearl, black Seawater pearl and dyed black Seawater pearl

Fig. 12. The PL spectra of white, orange, pink-purple, dark purple “Edison” pearls

Fig. 13. The PL spectra of dyed yellow, dyed purple, dyed black “Edison” pearls

Fig. 14. The PL spectra of white, pink-purple, dark purple and dyed purple “Edison” pearls

Fig. 15. The PL spectra of white, orange and dyed yellow “Edison” pearls

Fig. 16. The PL spectra of orange, dyed yellow “Edison” pearl, golden seawater pearl and dyed golden seawater pearl