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Pearl luster by chemical composition and internal structure of Akoya cultured pearl
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  • Journal title : The Korean Journal of Malacology
  • Volume 28, Issue 2,  2012, pp.157-164
  • Publisher : The Malacological Society of Korea
  • DOI : 10.9710/kjm.2012.28.2.157
 Title & Authors
Pearl luster by chemical composition and internal structure of Akoya cultured pearl
Sung, Min-Jun; Park, Jimin; Jang, Yun-Deuk;
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The patterns in X-ray diffraction (XRD) spectroscopy provide useful clue at to discriminate two types of Akoya cultured pearl which occurs difference of surface luster. Using the optical microscope, we could be confirmed that the nareous layer of each sample consist of different crystal form. In Fourier Transform Infrared (FT-IR) Spectroscopy analysis, the nareous layer of Akoya cultured pearls with poor luster shows some peaks at 712, 699, 1435, region and these peaks depend on the Calcite. But the nareous layer of pearls with excellent luster could not observed those peaks related with Calcite, we could observed Aragonite band at 699, region. Though this result, we know that the nareous layer of Akoya cultured pearls with excellent luster is mainly composed by Aragonite. Raman bands are also clearly demonstrated to occur difference of band intensity by difference of Aragonite content. In the Scanning Electron Microscope (SEM) analysis, we found that the Akoya cultured pearl luster and surface condition is associated with internal structure.
XRD Patterns;Akoya cultured pearl;FT-IR;Aragonite;SEM;
 Cited by
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