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CURRENT ISSUE
Volume 32, issues 5-8 2011
Abstracts of these articles may be viewed by clicking on the relevant titles, and Gem-A members may login to the membership area to view the full articles.
Measurement and interpretation of growth patterns in chrysoberyl, including alexandrite
Dr Karl Schmetzer
A Russian Maxixe beryl?
Lars Olov Andersson
Chemical and growth zoning in trapiche tourmaline from Zambia – a re-evaluation
Dr Karl Schmetzer, Dr Heinz-Jürgen Bernhardt and Thomas Hainschwang
Untreated yellowish orange sapphire exhibiting its natural colour
J.M. Duroc-Danner
Alexandrite and colour-change chrysoberyl from the Lake Manyara alexandrite-emerald deposit in northern Tanzania
Dr Karl Schmetzer and Anna-Kathrin Malsy
RECENT ISSUES
Click on titles to view abstracts of articles below. Gem-A members may login to view fully searchable versions of these issues on line.
2010 Volume 32 (1-4)
2009 Vol. 31 (5-8)
2008 Vol. 31 (1/2) (3/4)
Volume 32, 1-4, 2010
Volume 32, 2010 of the Journal of Gemmology is available to non-members at £38 + p&p. The individual articles are also available online. Abstracts of these articles may be viewed by clicking on the relevant titles, and Gem-A members may login to the membership area to view the full articles.
Mexican jadeite-bearing rock: a first mineralogical and gemmological approach
Mikhail Ostrooumov and Alfredo Victoria Morales
New data for distinguishing between hydrothermal synthetic, flux synthetic and natural corundum
Alexei S. Bidny, Olga S. Dolgova, Ivan A. Baksheev and Irina A. Ekimenkova
A cautionary tale about a little-known type of non-nacreous calcareous concretion produced by the Magilus antiquus marine snail
Thomas Hainschwang, Thomas Hochstrasser, Irka Hajdas and Wolfgang Keutschegger
Identification of CVD-grown synthetic melee pink diamond
Hiroshi Kitawaki, Ahmadjan Abduriyim, Jun Kawano and Makoto Okano
Appearance of new bead material in cultured pearls
Prof. Dr H.A. Hänni FGA, Dr M.S. Krzemnicki FGA and Laurent Cartier MSc FGA
The over-grading of blue-fluorescent diamonds: the problem, the proof
and the solutions
Michael D. Cowing
High pressure high temperature treatment of diamonds — a review of the patent literature from five decades (1960–2009)
Karl Schmetzer
The gemmological properties and infrared spectra of brucite, an imitation of nephrite and Shoushan stone
Li Jianjun, Yu Xiaoyan, Cai Jia, Liu Xiaowei, Fan Chengxing and Cheng Youfa
A new approach to the teaching and use of the refractometer
Darko B. Sturman
Use of the polarizing filter on the refractometer in determinations of the optic sign or optic character of a gemstone
Darko B. Sturman and Duncan Parker FGA FCGmA
Use of the polarizing filter to improve observations of the shadow edges on the refractometer
Darko B. Sturman and Duncan Parker FGA FCGmA
Volume 31, 2009
A signature for nephrite jade using its strontium isotopic composition: some Pacific Rim examples by Dr Christopher J. Adams and Russell J. Beck FGA. pp 153-62
Jaspilite — the gemstone of Ukraine by P. Baranov, S. Shevchenko, W. Heflik, L. Natkaniec-Nowak and M. Dumanska-Slowik. pp 163-69
Ruby and sapphire from Marosely, Madagascar by Laurent E. Cartier. pp 171-79
Identification of dyed jadeite using visible reflection spectra by Yan Liu, Taijin Lu, Manjun Wang, Hua Chen, Meidong Shen, Jie Ke and Beili Zhang. pp 181-84
Jadeite jade from Myanmar: its texture and gemmological implications by Guanghai Shi, Xia Wang, Bingbing Chu and Wenyuan Cui. pp 185-95
A description and history of one of the largest nacreous pearls in the world by J.C. (Hanco) Zwaan and Herman A. Dommisse. pp 196-202
Geographic typing of gem corundum: a test case from Australia by F. Lin Sutherland and Ahmadjan Abduriyim. pp 203-10
Dickite: a gem material for carving from Thailand by Seriwat Saminpanya, Chaichart Dharmgrongartama and Namrawee Susawee. pp 211-25
Application of mineralogical methods to the investigation of some gem-quality corals by Lucyna Natkaniec-Nowak, Magdalena Dumanska-Słowik, Jerzy Fijał and Anna Krawczyk. pp 226-34
Colour-change garnets from Madagascar: variation of chemical, spectroscopic and colorimetric properties by K. Schmetzer, H.-J. Bernhardt, G. Bosshart and T. Hainschwang. pp 235-82
The characteristics of red andesine from the Himalaya Highland, Tibet by Ahmadjan Abduriyim. pp 283-98
Volume 31, 2008
A fancy reddish brown diamond with new optical absorption features by Taijin Lu, T. Odaki, K. Yasunaga and H. Uesugi. pp 73-6
A place for CZ masters in diamond colour grading
by M. D. Cowing. pp 77-83
The geological context of gems in the Velasco Pegmatitic District, Argentina by F. Guillermo Sardi. pp 85-9
Magnetic susceptibility, a better approach to defining garnets by D. B. Hoover, C. Williams, B. Williams and C. Mitchell. pp 91-103
The refraction of light by garnet depends on both composition and structure
by D. K. Teertstra. pp 105-10
Ornamental variscite: A new gemstone resource from Western Australia by M. Willing, S. Stöcklmayer and M. Wells. pp 111-24
Visually distinguishing A-jadeite from B-jadeite by Li Jianjun, Liu Xiaowei, Zhang Zhiguo, Luo Yueping, Cheng Youfa and Liu Huafeng. pp 125-31
Issues 1/2
Thortveitite – a new gemstone by R. Chapman, I.F. Mercer, A.H. Rankin and J. Spratt. pp 1-6
Surface treatment of gemstones, especially topaz – an update of recent patent literature by Dr Karl Schmetzer. pp 7-13
Visualization of the internal structures of cultured pearls by computerized X-ray microtomography by U. Wehrmeister, H. Goetz, D.E. Jacob, A. Soldati, W. Xu, H. Duschner and W. Hofmeister. pp 15-21
Specular reflectance infrared spectroscopy – a review and update of a little exploited method for gem identification by Thomas Hainschwang and Franck Notari. pp 23-29
Afghan beryl varieties by Lucyna Natkaniec-Nowak. pp 31-39
The positions of light spots on rose quartz star spheres by Harold Killingback. pp 40-42
Identification of taaffeite and musgravite using a non-destructive single-crystal X-ray diffraction technique with an EDXRF instrument by Ahmadjan Abduriyim, Taisuke Kobayashi and Chihiro Fukuda. pp 43-54