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Pearl luster by chemical composition and internal structure of Akoya cultured pearl

아코야 진주의 화학조성과 내부구조가 진주광택에 미치는 영향에 관한 연구

  • Sung, Min-Jun (Department of Geology, Kyungpook National University) ;
  • Park, Jimin (Department of Geology, Kyungpook National University) ;
  • Jang, Yun-Deuk (Department of Geology, Kyungpook National University)
  • 성민준 (경북대학교 자연과학대학 지질학과) ;
  • 박지민 (경북대학교 자연과학대학 지질학과) ;
  • 장윤득 (경북대학교 자연과학대학 지질학과)
  • Received : 2012.06.12
  • Accepted : 2012.06.22
  • Published : 2012.06.30

Abstract

The patterns in X-ray diffraction (XRD) spectroscopy provide useful clue at $29.4^{\circ}$ 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, $1444cm^{-1}$ 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, $1085cm^{-1}$ 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.

우리는 같은 지역에서 생성된 진주의 표면품질 차이점의 원인을 다양한 분석을 통해 분석하고자 하였다. 본 연구들을 토대로 진주의 표면품질은 진주를 구성하고 있는 아라고나이트와 방해석의 함유량의 차이에 의해 발생되는 것으로 추정되었다. 또한 내부 구조분석을 통해 표면품질이 서로 다른 진주의 발생원인은 내부구조와 일정한 연관성이 있는 것으로 판단되었으며 진주의 생성환경 또한 영향을 줄 것이라 사료되었다. 하지만 앞서 실시한 대부분의 실험들이 파괴분석이며 이러한 분석들은 진주와 같은 가치 있는 시료에 부적합하므로 앞으로 새로운 방법의 실험들이 진행되어야 할 것이다.

Keywords

References

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