Xiaoyi Yang, Zhengyu Zhou, Xiaoman Qi, Zhiwei Zhang, Zongting Liao. Raman Spectrum Characteristics and Coloration Mechanism of Freshwater-Nucleated Pearls[J]. Laser & Optoelectronics Progress, 2021, 58(24): 2430001
- Laser & Optoelectronics Progress
- Vol. 58, Issue 24, 2430001 (2021)
Fig. 1. FTIR spectrum of claret-colored pearl sample ZZ-01
Fig. 2. Raman spectrum of claret-colored pearl sample ZZ-01 (aragonite peaks are marked)
Fig. 3. Raman spectra of freshwater-nucleated pearls. (a) Claret-colored pearl sample ZZ-01; (b) magenta pearl sample ZZ-02; (c) saffron pearl sample ZZ-03; (d) yellowish pearl sample ZZ-04; (e) pink white peal sample ZZ-05; (f) argenteous pearl sample ZZ-06
Fig. 4. Raman spectra of carotenoid standard samples. (a) β-catotene; (b) astaxanthin
Fig. 5. Raman spectra of nacre of Hyriopsis. (a) SJFB-front; (b) SJFB-middle
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Table 1. Raman peaks attribution of colored freshwater-nucleated pearls, nacre of Hyriopsis and carotenoid
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