33rd IGC 2013 Hanoi, Vietnam

Location and Working Hours
13. Oct 16. Oct. 2013

IGC 2013: Hanoi, Vietnam

Distinguished Participants of the 33rd IGC Conference in Hanoi, Vietnam

On behalf of Vietnam National University, Hanoi (VNU), I am pleased to extend my warmest welcome to all of you to the 33rd International Gemmological Conference (IGC).

Following the great success of the 32nd IGC which was co-organized by Swiss Gemmological Institute (SSEF) in 2011, VNU is honored to cooperate with DOJI Gold & Gems Group to host this year’s conference in the thousand-year-old capital city of Hanoi in its most beautiful season.

As you may know, Vietnam is endowed with a diversity of gem minerals thanks to its geologic position along the margins of two cratons. However, Vietnam’s mining and pearl farming sectors are still relatively small and undeveloped, leaving many potential resources unexploited. While being the leading university in Vietnam with an important role in scientific development, VNU finds this both an opportunity and responsibility in promoting the studies on gemmology, contributing to develop this potential industry of the country. Besides, we also need the practical experiences and support from other countries around the world, especially those with developed gemstone industries and research. For those reasons, we find the great necessity to hold this important event in Vietnam.

Aiming at going to the heart of all matters relating to gemstones and endeavoring to exchange every knowledge and experience in gemmology, this year’s conference will bring together the leading scientists, researchers, practitioners, managers and elite businessmen from around the world. I expect that you can gain lots of gemological inputs for your own gemological research and work as well as unforgettable experiences during your time in Vietnam.

On behalf of my co-chairman, Dr. Do Minh Phu – President of DOJI Gold & Gems Group, I wish you a memorable and enriching conference.

Phung Xuan Nha, Prof. Dr President of Vietnam National University, Hanoi


Lake Side hotel
Hanoi (Vietnam)

Sunday 13rd October

9.00-9.15 Opening Ceremony and Announcements

9.15-9.30 Greeting speech by VNU president

9.30-9.45 Greeting speech by DOJI president

9.45-10.00 Speech from IGC EXCO

10.00-10.15 Conference photo

10.15-10.30 Coffee Break


10.30-10.50 J.C. (Hanco) Zwaan, Eric Buter, Robert E. Kane: Mineral inclusions in alluvial sapphires from Montana - an update

10.50-11.10 M.A. Viktorov, A. D. Semina, M. I. Pshenichny: Sapphires from Koltashi deposits (Ural Mountains, Russia)

11.10-11.30 Dietmar Schwarz, Stefanos Karampelas, Lu Taijin, Claudio C. Milisenda: Kenya, Tanzania: ruby and sapphire – an update/review

11.30-11.50 Nguyen Ngoc Khoi, Christoph A. Hauzenberger, Chakkaphan Sutthirat, Duong Anh Tuan, Nguyen Thi Minh Thuyet, Nguyen Thuy Duong, Nguyen Van Nam, Chu Van Lam: The characteristics of gneiss-hosted corundum deposits of Tan Huong-Truc Lau area, Northern Vietnam

11.50-12.10 Pornsawat Wathanakul, Prayath Nantasin, Kachane Kraisittipong, Prakarn Buenkoontod, Marute Lekkean: New deposit style concept and characteristics of gem corundum, Phrae Province, Nor thern Thailand

12.10-13.30 Lunch (Lake Side hotel: Azuma Japanese Restaurant)


13.30-13.50 Emmanuel Fritsch, Aurélien Delaunay, Benjamin Rondeau, Ichiro Sunagawa, Moreton Moore, Thomas Hainschwang: The morphology of natural and synthetic diamonds: Remaining challenges

13.50-14.10 Thomas Hainschwang, Emmanuel Fritsch, Franck Notari, Benjamin Rondeau, Andrey Katrusha: The origin of colour and correlated properties of natural type Ib diamonds

14.10-14.30 Hiroshi Kitawaki, Mio Hisanaga, Masahiro Yamamoto: Identification of gem diamonds using high-energy UV luminescence imaging

14.30-14.50 James E. Shigley: Observations on CVD-grown synthetic diamonds

15.00 Meeting point at Lake Side hotel lobby to go on bus to visit Ruby Plaza (DOJI)

15.30-18.30 Ruby Plaza tour, Gems show and Auction

18.30-21.00 Galal dinner (Invited by VNU and DOJI presidents)

21.00 Meeting point at Ruby Plaza lobby to go on bus back to Lake Side hotel

Monday 14th October

8.00-8.45 EXCO reunion


9.00-9.20 Jayshree Panjikar, Aatish Panjikar: Yellow blue bicoloured sapphires from Chinnadharapuram, South India

9.20-9.40 Hpone-Phyo Kan-Nyunt, Lore Kiefert, Stefanos Karampelas: Characteristics of sapphires from the Kyat Pyin area, West Mogok, Burma (Myanmar)

9.40-10.00 Shane McClure: The potential for Co-diffusion in sapphire

10.00-10.20 Kentaro Emori, Hiroshi Kitawaki, Makoto Okano: The present situation of Beryllium diffusion corundum

10.20-10.40 Coffee Break

10.40-11.00 Y. Shelementiev, R. Serov, E. Altunina, M. Pshenichnyy: Alteration of the mineral inclusions behavior in corundum during heat treatment process

11.00-11.20 Hai An Nguyen Bui, Emmanuel Fritsch, Franck Notari, Alexandre Droux, Aurélien Delaunay, Benjamin Rondeau: Kashmir sapphires: geographical origin determination of top-quality blue sapphires versus science


11.20-11.40 Shigeru Akamatsu: Cultured pearl – Present situation and future prospect

11.40-12.00 Terrence S. Coldham: Observations of natural pearls within freshly opened Pinctada maculata from Tongavera atoll, Cook Islands

12.00-13.30 Lunch (Lake Side hotel: Royal Restaurant)

13.30-13.50 Laurent E. Cartier, Michael S. Krzemnicki, John Rere: Pearl or gemstone? Galatea pearls: a “new” pearl product from French Polynesia

13.50-14.10 Stefanos Karampelas, Enrique Arizmendi, Douglas McLaurin, Manuel Nava, Pierre Hardy, Lore Kiefert: Current situation of the pearl cultivation at Guaymas (Sonora) Mexico

14.10-14.30 Steve Kennedy: The pearl of Asia: examination of the pearl, a review of its history, and conjecture on its origin

14.30-14.50 Kenneth Scarratt: Additional data collected on natural and cultrured pearls from P. maxima in Australian waters

14.50-15.10 Sutas Singbamroong, Nazar Ahmed: Digital SLR camera applied to investigation of X-ray luminescence of pearl

15.10-15.30 Abeer Tawfeeq Al-Alawi, Stefanos Karampelas, Osama Taqi: Comparison of “cavities” in saltwater natural pearls and saltwater cultured pearls without bead

15.30-15.50 Coffee Break

15.50-17.00 Poster Session 1

18.00 Meeting point at Lake Side hotel lobby to go on bus to dinner

19-21.00 Dinner at POTOMAC restaurant (a boat on West lake)

21.00 Meeting point at the restaurant entrance to go on bus to Lake Side hotel

Tuesday 15th October

Beryl, chrysoberyl, spinel, garnet

9.00-9.20 Jurgen Schnellrath, Ricardo Scholz, Dietmar Schwarz, Stefanos Karampelas, Ariadne Senna Azzaro: Itatiaia mine: a new emerald occurrence near Conselheiro Pena, Minas Gerias, Brazil

9.20-9.40 Jean Marie Dereppe, Claudette Moreaux: Identification of Maxixe beryls by EPR

9.40-10.00 Le Thi-Thu Huong, Tobias Häger, Wolfgang Hofmeister, Stefanos Karampelas, Nguyen-Duc Trung- Kien: New features to identify natural and synthetic emerald by vibrational spectroscopy

10.00-10.20 Karl Schmetzer, Michael S. Krzemnicki, Thomas Hainschwang, Heinz-Jürgen Bernhardt: The role of vanadium and titanium in natural and synthetic chrysoberyl and alexandrite – colora tion, chatoyancy and asterism

10.20-10.40 Coffee Break

10.40-11.00 Edward Boehm: A comparative overview of inclusions in spinel

11.00-11.20 Tobias Häger, Christoph A. Hauzenberger, D. Zimmer, Nguyen Ngoc Khoi, Duong Anh Tuan, Le Thi-Thu Huong, Wolfgang Hofmeister: Causes of colour of natural untreated spinels from Vietnam in comparison to flame fusion and flux grown synthetics

11.20-11.40 Henry A. Hänni: Rare Earth Elements in mint green grossular garnet from Merelani, Tanzania

11.40-12.00 Jaroslav Hyrsl: Spectroscopic study of chrome pyropes from different sources

12.00-13.30 Lunch (Lake Side hotel: Azuma Japanese Restaurant)

Topaz, zoisite, feldspar, quartz, jade, optical effect

13.30-13.50 Masaki Furuya: Spectroscopic study of electron-irradiated OH-type topaz

13.50-14.10 Claudio C. Milisenda, Kathrin Wehr, Michael Wild: Zoisite from Pakistan

14.10-14.30 Willow Weight: Canadian labradorite – classic colour

14.30-14.50 Ulrich Henn, Rainer Schultz-Güttler: Special features in quartz colours

14.50-15.10 Mimi C. M. Ouyang, Miro F. Y. Ng: The zonal texture and isomorphic series in Fei Cui minerals

15.10-15.30 Michael S. Krzemnicki, W. Zhou, J. Maizlan: Colour change effects in gemstones: causes and perception

15.30-15.50 Coffee Break

15.50-17.00 Poster session 2

18.00 Meeting point at the Lake Side hotel lobby to go on bus to dinner

19.00-21.00 Dinner at Phu Son restaurant in Bac Ninh province

21.00 Meeting point at the entrance of the restaurant to go on bus back to Lake Side hotel

Wednesday 16th October

8.00-8.45 EXCO Meeting

Glass, historic jewelry, occurrence, application

9.00-9.20 Karen E. Fox: Optical spectroscopy of iron in sodium silicate glasses

9.20-9.40 Elisabeth Strack, Ruslan I. Kostov: Gemmological examination of jewellery objects from the Veliki Preslav treasure in Bulgaria

9.40-10.00 Anette Clausen: Gemstones of Greenland

10.00-10.20 Michael Gray: Gemstone mining in the United States in the previous decade

10.20-10.40 Coffee Break

10.40-11.00 Menahem Sevdermish: Further research into digital color analysis and communication of color in gems

11.00-11.20 Yuri Shelementiev, Sergey Sivovolenko: Digital Microscopy applications in gemology

11.20-12.00 Announcements

12.00-13.30 Lunch (Lake Side hotel: Royal Restaurant)

13.30 Meeting point at the Lake Side hotel lobby to go on bus to visit Presidential Palace

15.30 Back to the Lake Side hotel

16.00-17.00 Conference closing ceremony

17.00 Conference ends


Monday 14th October

15.50 Chakkrich Boonmee, Natthapong Monarumit , Sermrak Ingavanija, Somruedee Satitkune, Pornsawat Wathanakul: Structural and chemical analysis of Thai ivory from Lampang Province using SEM/EDS and LA-ICP-MS

15.55 Gagan Choudhary, Shyamala Fernandes: Inclusions in Indian rubies

16.00 Christoph A. Hauzenberger, Nguyen Ngoc Khoi, Chakkaphan Sutthirat, Tobias Häger, Pornsawat Wathanakul, Duong Anh Tuan: Genesis of corundum with spinel corona from Truc Lau and Kinh La, North Vietnam

16.05 Arunas Kleismantas: XVII – XVIII century garnet-garnet doublets imitating rubies

16.10 Liu-Shang-I, George Bosshart†, Peng Ming-sheng: Causes of colour in natural and irradiated green spodumene

16.15 Gamini Zoysa: Sapphire deposits of Sri Lanka – past & present

16.20 Natthapong Monarumit, Thitinun Chantrakul, Pongsakorn Jantaratana, Pornsawat Wathanakul: Application of dielectric constant values for identifying ruby samples from Myanmar and Mozambique

16.25 Nguy Tuyet Nhung, Le Thi Thu Huong, Nguyen Thi Le Ouyen, Tran Thi Duyen, Dinh Thi Hue, Tran Thi Lan: Gemstones from the Luc Yen pegmatite in Vietnam

16.30 Aumaparn Phlayrahan, Natthapong Monarumit, Lucksika Loetwanitsakul, Somruedee Satitkune, Pornsawat Wathanakul: The alteration of structural OH group in FTIR spectra on ruby samples from Mong Hsu, Myanmar and Montepeuz, Mozambique

Tuesday 15th October

15.50 Somruedee Satitkune, Bhuwadol Wanthanachaisaeng, Krit Won-in, Wiwat Wongkokau, Pongsakorn Chantararat, Thanong Leelawattanasuk, Pornsawat Wathanakul: Heat treatment of zircon samples from Kanchanaburi, Thailand and Ratanakiri, Cambodia

15.55 Chanikarn Sanguanphun, Natthapong Monarumit, Thanapong Lhuaamporn, Wiwat Wongkokua, Somruedee Satitkune, Pornsawat Wathanakul: Effect of electron irradiation on diamond surfaces using Atomic Force Microscope

16.00 John M. Saul: Gemstone occurrences, “organic” odors, and a circular structure in the collision zone between East and West Gondwana

16.05 S. Sivovolenko, R. Serov, Y. Shelementiev: Fancy colored diamonds cut optimization technology

16.10 Elizabeth Su: Classification of jadeite

16.15 Sora Shin, Jingyo Seo, Yongkil Ahn, U. Tin Hlaing, Jongwan Park: Differentiation of the colourless gemstones: phenakite, petalite, pollucite and goshenite

16.20 Panjawan Thanasuthipitak, Chawalit Chankhantha, Theerapongs Thanasuthipitak: Heat treatment of coloured beryl from Madagascar

16.25 Nguyen Thi Minh Thuyet, Nguyen Ngoc Khoi, Christoph Hauzenberger, Nguyen Hoang, Duong Anh Tuan: Some gemological characteristics of peridot from South Vietnam

16.30 U. Wehrmeister, T. M. Gluhak, H. Götz, D. E. Jacob: Differentiation of African and Asian elephant dentine by FT-Raman spectroscopy and chemometric methods