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Volume 17 Issue 4
Jul.  2015
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CHU Shichen, LUO Yong'an. Gemmological Characteristic of the Northern Pearl of China[J]. Journal of Gems & Gemmology, 2015, 17(4): 29-35.
Citation: CHU Shichen, LUO Yong'an. Gemmological Characteristic of the Northern Pearl of China[J]. Journal of Gems & Gemmology, 2015, 17(4): 29-35.
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Gemmological Characteristic of the Northern Pearl of China

  • 1. College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China;

  • 2. Qinhuangdao Gem Supervision and Inspection Station, Qinhuangdao 066004, China

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  • Received Date: December 16, 2014
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    • Abstract
  • Hyriopsis cumingii is chosen as the pearly mussel. The gemmological characteristics of the northern pearl produced from Liaoning Province of China were investigated, with the help of hydrostatic weighing method, X-ray powder diffraction, Fourier transform infrared spectroscopy and scanning electron microscope. The testing results show that the relative density of the northern pearl of China is from 2.722 1-2.733 5. The mineral components of the northern pearl of China are aragonite and protein. The structure of the northern pearl of China is characterized as a form of “brick wall”. The thickness between aragonite layers of the northern pearl of China is 170 nm.
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    • References (13)
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