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Volume 3 Issue 1
Mar.  2001
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Boris M. Shmakin, Anton V. Vassilyev, Katherina V. Zolotareva. Study of Some Uniaxial Minerals for Better Orientation of Faceting[J]. Journal of Gems & Gemmology, 2001, 3(1): 27-30.
Citation: Boris M. Shmakin, Anton V. Vassilyev, Katherina V. Zolotareva. Study of Some Uniaxial Minerals for Better Orientation of Faceting[J]. Journal of Gems & Gemmology, 2001, 3(1): 27-30.
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Study of Some Uniaxial Minerals for Better Orientation of Faceting

  • 1. Institute of Geochemistry, Irkutsk 664033, Russia;

  • 2. "LAL" Scientific and Industrial Company, Moscow 125502, Russia;

  • 3. Technical University, Irkutsk 664074, Russia

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  • Received Date: January 02, 2001
    Graphical Abstract
    • Abstract
  • For better manifestation of colours in anisotropic transparent stones the orientation of faceting along optical axes is necessary. Degree of absorption along and perpendicular to the main optical axis was studied for some uniaxial minerals, using several types of spectrophotometers. Tourmalines from Russian and American deposits, natural and synthetic rubies, blue beryls and apatites were measured. For all studied minerals the best orientation of faceting is recommended.
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    • References (3)
  • [1]
    Platonov A N.Nature of minerals colouring (in Russian)[M].Kiev:Naukova Dumka Publilshers, 1 976
    [2]
    Zagorsky V Ye, Peretyzhko I S, Shmakin B M. Miarolitic pegmatites(Granitic pegmatites, Vol.3)(in Russian)[M].Novosibirsk:Nauka Publishers, 1 999
    [3]
    Reznitsky L Z.Mineral associations of magnesial scarns in Sludyanka phlogopite deposits[C].In:Mineralogy of Cisbaikalia.Irkutsk:Institute of Geochemistry, 1 978.169-183
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