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Volume 10 Issue 4
Dec.  2008
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LUO Yue-ping, DUAN Ti-yu, WANG Chun-sheng. A Preliminary Study on "Heidan" Stone[J]. Journal of Gems & Gemmology, 2008, 10(4): 31-33.
Citation: LUO Yue-ping, DUAN Ti-yu, WANG Chun-sheng. A Preliminary Study on "Heidan" Stone[J]. Journal of Gems & Gemmology, 2008, 10(4): 31-33.
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A Preliminary Study on "Heidan" Stone

  • National Jewelry Quality Supervision and Inspection Center, Beijing 100101, China

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  • Received Date: August 06, 2008
  • Revised Date: September 22, 2008
    Graphical Abstract
    • Abstract
  • A kind of so-called "Heidan" stone is appeared in Beijing jewelry markets.It is black and has strong magnetism,which is called "hematite" or "goethite" by traders.The stone samples are preliminarily studied by using the conventional gemmological tests and advanced equipments in order to get the correct name.The results show that the samples are mainly composed of Fe and Sr,and the chemical composition is SrO·6Fe2O3.So the stone is inferred an artificial magnetic material——strontium ferrite,but not hematite or goethite.
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    • References (4)
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    陈志军,傅正义,王皓,等.铁氧体材料研究进展[J].陶瓷科学与艺术,2003,37(3):31.
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    国家珠宝玉石质量监督检验中心.珠宝玉石国家标准释义[M].北京:地质出版社,1996.
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    吴安国.六角晶永磁铁氧体的最近进展[J].磁性材料及器件,1999,(3):1-8.
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    徐修生.高性能锶铁氧体磁性材料的研制[J].金属矿山,2000,(7):24-25.
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