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Article type: Cover
1979 Volume 6 Issue 1-2 Pages
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Article type: Index
1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
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Ichiro Sunagawa
Article type: Article
1979 Volume 6 Issue 1-2 Pages
3-21
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The 1lth General Meeting of the International Mineralogical Association was held in Novosibirsk from September 4 to 19, 1978. There were both pre-and post-conference excursions to the Lake Baikal and mineralogical museums in Moscow and Leningrad, as well as two other trips. This meeting gave us a very unique opportunity to see the activities in socialists' countries on gemmological researches, whose information has hardly been conveyed to the other part of the world. There was a full day symposium on "Gem Minerals an Gemmology" on "Crystal Growth", and two half day symposia on "High Pressure Minerals", in which papers of gemmological interests were presented, which include many papers by scientists of socialists' countries. Altogether 36 papers of gemmological interests presented in these symposia are critically reviewed in this article, through which gemmological activities in socialists' countries are introduced. Among 36 papers, 15 papers are on diamond, which reflects the interests in diamonds in USSR. There were altogether 5 papers reporting the syntheses of gem materials. Emeralds have been successfully synthesized by flux, hydrothermal and CVT methods at the Institute of Geology and Geophysics, Novosibirsk, alexandrite by Czochralski technique at the same institute, amethyst and other coloured quartz by the Institute "VlNISIM", Alexsandrov, tourmaline at the Institute of Crystallography, Moscow, as well as well-known cubic zirconia. Geological and mineralogical studies were reported on charoite, new purple coloured ornamental mineral, nephrite of various colour, Iazurite near the Lake Baikal, several pegmatites, ruby and sapphire in the Karelian-Kola region. Gem minerals, including mordavite, found in Czechoslovakia, Bulgaria, Poland, Yugoslavia are also reported by scientists of respective countries. Interesting were papers on fresh-water pearls found in inland lakes of USSR, and on amber and other fossil resins. Clearly mineralogy of amber has been studied extensively in USSR. The Working Group on Gem Minerals and Gemmology, which was initiated at the IMA-9, 1974, and has not been active enough, was decided to be re-organized at the Council Meeting of IMA, and Sunagawa and Savkevich were nominated as chairman and secretary of the W. G., respectively. The W. G. decided to change its name to the Working Group on Gem Materials, and its aim is to encourage and stimulate research activities on gem materials, both natural and synthetic. The W. G. organizes a symposium on gem materials during IMA-12 to be held in Orleans, France in June,1980, and Schubnel will act as its conveyner.
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Hiroshi Takubo, Yuko Kitamura, Yoshihide Nakazumi, Mitsue Koizumi
Article type: Article
1979 Volume 6 Issue 1-2 Pages
22-28
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Flux-grown emeralds from USSR were observed under microscopes and their growth conditions were estimated. Their internal textures are charaicterized by (1) veil-like secondary inclusions along the curved surfaces of tension cracks, (2) veil-1ike primary inclusions filling the pores in the mosaic structure and (3) silk-like inclusions intersecting with an obtuse angle to the c-axis of emerald. Their internal textures and surface structures suggest the rapid growth at the bottom of crucible under the conditions of higher temperatures and supersaturation rate, compared to those in the ordinary methods for growing emeralds. Slow cooling and stirring technique may be used for increasing the growth rate.
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Hiroshi Konno
Article type: Article
1979 Volume 6 Issue 1-2 Pages
29-33
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Brief outline of the IMA-11, held on September 4-10, 1978, in Novosibirsk, USSR is given, along with somewhat detailed descriptions of mineral localities around the Lake Baikal, where pre-conference excursion was made, and of a new ornamental mineral, charoite.
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
34-35
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
36-40
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
40-42
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
42-43
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[in Japanese]
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1979 Volume 6 Issue 1-2 Pages
44-
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
44-46
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[in Japanese]
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1979 Volume 6 Issue 1-2 Pages
46-
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Article type: Bibliography
1979 Volume 6 Issue 1-2 Pages
47-52
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Article type: Appendix
1979 Volume 6 Issue 1-2 Pages
52-53
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Article type: Appendix
1979 Volume 6 Issue 1-2 Pages
54-55
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Article type: Appendix
1979 Volume 6 Issue 1-2 Pages
56-57
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[in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
58-
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[in Japanese], [in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
58-59
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[in Japanese], [in Japanese], [in Japanese]
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1979 Volume 6 Issue 1-2 Pages
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[in Japanese], [in Japanese], [in Japanese]
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1979 Volume 6 Issue 1-2 Pages
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[in Japanese], [in Japanese], [in Japanese]
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1979 Volume 6 Issue 1-2 Pages
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[in Japanese], [in Japanese], [in Japanese]
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1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
60-61
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[in Japanese], [in Japanese]
Article type: Article
1979 Volume 6 Issue 1-2 Pages
61-62
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Article type: Article
1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
62-63
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1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
63-64
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Article type: Article
1979 Volume 6 Issue 1-2 Pages
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Article type: Article
1979 Volume 6 Issue 1-2 Pages
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Article type: Cover
1979 Volume 6 Issue 1-2 Pages
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1979 Volume 6 Issue 1-2 Pages
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