Study on the Microstructure  of the  <i>Pinctada martensii</i>  Pearls and Its Significance

<table>X-ray diffraction patterns of the nacres of the different-quality pearls. (a) High-quality pearls; (b) medium-quality pearls; (c) inferior-quality pearls; (d) aragonite crystal; (e) calcite crystal.</table>

International Scholarly Research Notices

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Figure 4

Figure 4: Study on the Microstructure  of the  <i>Pinctada martensii</i>  Pearls and Its Significance 

International Scholarly Research Notices

Study on the Microstructure of the Pinctada martensii Pearls and Its Significance

Figure 4