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Volume 4 Issue 1
Mar.  2002
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Zhu Xuanmin, Jiang Hongqi, Li Qunyong. Study on Gemmology of Non-Pyrophyllite-Type Qingtian Stone from Zhejiang Province[J]. Journal of Gems & Gemmology, 2002, 4(1): 6-11.
Citation: Zhu Xuanmin, Jiang Hongqi, Li Qunyong. Study on Gemmology of Non-Pyrophyllite-Type Qingtian Stone from Zhejiang Province[J]. Journal of Gems & Gemmology, 2002, 4(1): 6-11.
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Study on Gemmology of Non-Pyrophyllite-Type Qingtian Stone from Zhejiang Province

  • 1. Gemmological Institute, China University of Geosciences, Wuhan, 430074, China;

  • 2. Science and Technology Association of Qingtian, Zhejiang, 323900, China;

  • 3. Shankou Clam, Qingtian, Zhejiang, 323904, China

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  • Received Date: January 08, 2002
    Graphical Abstract
    • Abstract
  • It is a controversial problem that the type assignment of the Qingtian Stone from Zhejiang Province belongs to the pyrophyllite-type or not.In order to solve this problem，some measurements such as X-ray powder diffraction analysis，infrared absorption spectrum ，scan electron microscope and differential thermal analysis are adopted.The results show that the main species of Qingtian Stone are pyrophyllite-type，but there also exist some species which are not pyrophyllite-type，such as dickite-type，illite-type，sericite-type and so on.In this paper，the gem features and mechanism of the Qingtian Stone are discussed．
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    • References (9)
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