Journal of The Gemmological Society of Japan

Online ISSN : 2189-8413
Print ISSN : 0385-5090
ISSN-L : 0385-5090

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Issue 4 Pages 87-
Issue 2-3 Pages 39-
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Volume 9, Issue 2-3

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[title in Japanese]

Article type: Cover
1982 Volume 9 Issue 2-3 Pages Cover1-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_Cover1

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[title in Japanese]

Article type: Index
1982 Volume 9 Issue 2-3 Pages Toc1-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_Toc1

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[title in Japanese]

Article type: Index
1982 Volume 9 Issue 2-3 Pages Toc2-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_Toc2

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Synthetic Rubies of Gem Quality, Isometric in Form, With Numerous Unblemished Crystal Faces

P. O. Knischka, E. Gubelin, 雄史宮田

Article type: Article
1982 Volume 9 Issue 2-3 Pages 39-54
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_39

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Corundum was crystallized synthetically by an as yet undisclosed method of gradient-technique, through super-cooling and super-saturation. The finished crystals have flat, brilliant growth-faces and mineralogically significant indices, whose great number as well as combination has heretofore been unobserved. The elementary nuclei can be grown to macroscopic single crystals, twins or multiple-complexes, phantoms, as well as clusters. The trade mark (K was formed using the initials of Paul Knischka's name with the "P" inverted. These synthetic rubies are, once cut, distinguishable from natural ruby in the same manner as natural ruby is distinguished from synthetics of other makes and methods.

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Nambulite and Sugilite : Two New Minerals Found in Japan and Later Found as Gem Materials

Ichiro Sunagawa

Article type: Article
1982 Volume 9 Issue 2-3 Pages 55-60
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_55

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Nambulite, LiNaMn_8Si_<10>O_<28>(OH)_2, and sugilite, (K, Na) C(H_2O), Na]_2 (Fe^<3+>, Na, Ti, Fe^<2+>)_2 (Li, Al, Fe^<3+>)_3 Si_<12>O_<30>, are two new minerals found and described for the first time in Japan. At the time of findings of the two minerals, no body imagined that these could be gem materials. But, recently, two minerals of gem quality have been found in Africa. Nambulite found at Kombat, Tsumeb, Nambia is deep red in colour and transparent, attaining 3cm in length, and cuttable as facet stones. Sugilite found in Wessels mine, Karahali manganese field, Cape Province, South Africa is violet in colour, and translucent, beautiful enough for cabochon cutting. This was at first reported as sogdianite, but later was identified as sugilite. Both are most unusual cases for new minerals found in Japan, and thus are introduced in this paper.

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1. Kinberlites, Diatremes and Diamonds : Their Geology, Petrology, and Geochemistry, 2. The Mantle Sample : Inclusions in Kimberlites and Other Volcanics, F. R. Boyd and H. O. A. Meyer ed. American Geophysical Union, 1979

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 60-63
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_60

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[title in Japanese]

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 64-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_64_1

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Emerald and Other Beryls, John Sinkankas, Chilton Book Co., Randor, Pennsylvania, 18cm×22.5cm, 665,1981

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 64-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_64_2

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[title in Japanese]

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 65-66
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_65

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[title in Japanese]

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 66-67
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_66

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[title in Japanese]

[in Japanese]

Article type: Article
1982 Volume 9 Issue 2-3 Pages 67-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_67

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[title in Japanese]

Article type: Bibliography
1982 Volume 9 Issue 2-3 Pages 68-83
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_68

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[title in Japanese]

Article type: Cover
1982 Volume 9 Issue 2-3 Pages Cover2-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_Cover2

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[title in Japanese]

Article type: Cover
1982 Volume 9 Issue 2-3 Pages Cover3-
Published: October 15, 1982
Released on J-STAGE: January 16, 2017

DOIhttps://doi.org/10.14915/gsjapan.9.2-3_Cover3

JOURNAL FREE ACCESS

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