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Volume 15 Issue 2
May  2013
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HU Yang, FAN Lu-wei, XUE Qin-fang. Study on Filling Treatment and Identification Characteristics of Opal from Ethiopian[J]. Journal of Gems & Gemmology, 2013, 15(2): 32-37.
Citation: HU Yang, FAN Lu-wei, XUE Qin-fang. Study on Filling Treatment and Identification Characteristics of Opal from Ethiopian[J]. Journal of Gems & Gemmology, 2013, 15(2): 32-37.
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Study on Filling Treatment and Identification Characteristics of Opal from Ethiopian

  • 1. Gemmological Insititute, China University of Geosciseces, Wuhan 430074, China;

  • 2. Yifu Museum, China University of Geosciseces, Wuhan 430074, China

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  • Received Date: October 24, 2012
    Graphical Abstract
    • Abstract
  • A large variety of opals are produced from WOLLO,Ethiopian,but the fire opal and water opal are unstable and easy to crack due to the change of temperature or moisture.Those cracks seriously affect the stability and processing performance of the opals.Therefore,the filling treatment of the fire opal and water opal from WOLLO are studied in this experiment.And then the microscopic magnification observation and specific gravity,UV fluorescence,infrared spectroscopy are also used for test and analysis of the opals before and after the filling treatment.Some identification characteristics for opals with organic filling are summarized.The absorption peaks of the infrared spectrum at 2 800-3 100 cm-1 are the main identification characteristics to distinguish the natural opals from treated samples.And the surface,internal characteristics by filling treatment under microscope,smaller specific gravity,strong blue-white UV fluorescence and worm-like appearance at the cracks could also be used as auxiliary identification characteristics.We can conclude from the results and discussion in the experiment that the filling treatment of opals are feasible and those open cracks are easily filled.
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    • References (12)
  • [1]
    Rondeau B,Mazzero F,Bekele E,et al.New play-of-coloropal from Welo Ethiopia.[J].Gems&Gemology,2009,45(1):59-60.
    [2]
    Rondeau B,Fritsch E,Mazzero F,et al.Play-of-color opalfrom Wegel Tena,Wollo Province,Ethiopia[J].Gems&Gemology,2010,46(2):90-105.
    [3]
    Rondeau B,Benedicte C,Emmanuel F.Gemchemical andpetrological characterization of gem opals from Wegel Tena,Wollo,Ethiopia:Opal formation in an Oligocene soil[J].Ge-ochemistry-exploration environment analysis,2012,12(2):93-104.
    [4]
    Rondeau B,Emmanuel F,Mazzero F.Suger-acid treatmentof opal from Wollo,Ethiopia[J].Gems&Gemology,2011,47(4):333-334.
    [5]
    Williams B,Williams C.Smoke treatment in Wollo Opal[EB/OL].www.stonegrouplabs.com,2011.
    [6]
    Filin S V,Puzynin A I.Prevention of cracking in Ethiopian opal[J].The Australian Gemmologist,2009,(23):579-582.
    [7]
    曲刚.云南祖母绿的矿物学及改善研究[D].北京:中国地质大学(北京),2007.
    [8]
    李友华,章安玉,杨照.绿松石加胶改色的研究[J].珠宝科技,1994,6(1):28-29.
    [9]
    法默V C.矿物的红外光谱[M].应育浦,汪寿松,李春庚,等,译.北京:科学出版社,1982.289—303.
    [10]
    吴谨光.近代傅立叶变换红外光谱技术及应用(下卷)[M].北京:科学技术出版社,1994.
    [11]
    邓常劼,王铎,徐彬,等.碧玺充填探讨[J].宝石和宝石学杂志,2009,11(3):42-43.
    [12]
    王雅玫,杨明星.中低档宝石的充填处理[J].宝石和宝石学杂志,2008,10(4):23-27.
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