IGC 2011 Programme Interlaken, Switzerland 13-17 July 2011 Wednesday 13 July 18.00-20.30 IGC Welcome reception in Interlaken at the Grand Hotel Victoria Jungfrau 20.30-22.00 Executive Committee (EXECO) reunion Thursday 14 July Coloured Stones 9.00-9.20 Opening ceremony and Announcements 9.20-10.05 Invited lecture by Prof. T. Armbruster, University of Berne, Switzerland Gemmology at the Interface between Mineralogy and Crystallography Tourmaline, Garnet, Spodumene, Spinel, Turquoise (Chairman John Koivula) 10.05-10.25 Karl Schmetzer et al : Trapiche tourmaline from Zambia chemical and structural zoning 10.25-10.45 Federico Pezzotta et al: Gem tourmaline from Elba Island, Italy 10.45-11.05 Coffee break 11.05-11.25 Ulrich Henn et al: Mn-bearing grossular garnet 11.25-11.45 George Bosshart et al: Colorimetric investigation of unstable and stable spodumene colours 11.45-12.05 Furuya Masaki Colouring agents and their spectra in blue spinel 12.05-12.25 Jean Marie Dereppe et al : EPR of turquoise and some of its imitations
12.25-14.00 Lunch Quartz, Opals (Chairman Lin Sutherland) 14.00-14.20 Jurgen Schnellrath et al.: Quartz cat s eyes with unusual fibre distribution patterns 14.20-14.40 Claudio Milisenda et al : Irradiated blue common opal from Brazil 14.40-15.00 Benjamin Rondeau et al : Play-of-colour opal from Wollo, Ethiopia: a new pedogenetic model for gem opal formation 15.00-16.00 Poster session (see below) 15.40-16.00 Coffee break Beryls 16.00-16.20 Henry Hänni : Beryl 30 years later 16.20-16.40 Liu Shang-I et al: Study of an extraordinary Cs- and Li-rich beryl from Madagascar 16.40-17.00 Hanco Zwaan et al. : Preliminary report on emeralds from the Fazenda Bonfim region, Rio Grande do Norte, Brazil 17.00 Conference closes 19.00 Meeting point Kursaal entrance for walk to Harder Kulm train station 19.30-22.00 Dinner at Harder Kulm Restaurant 8.00-8.45 EXECO reunion Friday 15 July Pearls / Diamonds Pearls (Chairman Hanco Zwaan) 9.00-9.20 Elisabeth Strack : An overview of production techniques for Chinese freshwater cultured pearls 9.20-9.40 Michael Krzemnicki et al.: External and internal structures of Tokki pearls: additional cultured pearls formed during pearl cultivation
9.40-10.00 Nick Sturman et al. Cultured Queen Conch pearls A comparison to natural Queen Conch pearls 10.00-10.20 Federico Bärlocher : The natural Melo pearls from the Andaman Sea, Myanmar 10.20-10.40 Coffee break Diamonds (Chairman Karl Schmetzer) 10.40-11.00 Laurent Cartier Diamond production in Sierra Leone since 1930 11.00-11.20 N. N. Zudina, et al.: Orange diamonds from the Siberian placers: the features of structural defects 11.20-11.40 Thomas Hainschwang et al.: Photoluminescence spectroscopy and imaging of type Ib diamonds 11.40-12.00 Emmanuel Fritsch et al.: Birefringence in diamond: a useful tool to separate natural from synthetic diamond 12.00-12.05 Announcements 12.05-13.30 Lunch 13.30-14.20 Poster session (see below) Diamonds (Chairman Tay Thye Sun) 14.20-14.40 Yuri Shelementiev et al.: Distinction between well and poorly cut diamonds on the basis of dark zone analysis 14.40-15.00 Joe Yuan et al.: Using synchrotron radiation to analyse diamond crystal structure 15.00-15.20 Israel Eliezri From Rough to Report Use of Technology 15.00 Conference day closes 17.00 Meeting point Kursaal entrance for walk to boat pier Interlaken East 17.30 Boat leaves for Giessbach 19.00 Conference photograph will be taken with all participants at Giessbach 19.30-22.00 Gala Dinner at Giessbach Hotel Saturday 16 July Coloured Stones
Corundum, Heat treatment (Chairman Ulrich Henn) 9.00-9.20 Walter Balmer et al.: Re-assessment of the characterisation of UV-Vis spectra for rubies from marble-hosted deposits 9.20-9.40 Jayshree Panjikar et al.: Importance of various feather type inclusions in the identification of natural, treated, synthetic and treated-synthetic yellow sapphire 09.40-10.00 John Koivula: High temperature fusion of corundum mimics socalled residues in heat treated rubies and sapphires 10.00-10.20 Visut Pisutha-Arnond et al.: Blue coloration of heat-treated zircon 10.20-10.40 Coffee break Corundum (Chairlady Francine Payette) 10.40-11.00 John Saul Emplacement of deposits of coloured gemstones at the intersection of faults with the perimeters of large circular structures 11.00-11.20 Lore Kiefert: Sapphires from exotic sources: Azad Kashmir and New Zealand 11.20-11.40 Lin Sutherland et al.: The New England, New South Wales, Australia gem field: geographic typing of a world class giant gem deposit of basaltic placer origin 11.40-12.00 Nguyen Ngoc Khoi et al.: Three main types of corundum gem deposits in Vietnam 12.00-12.20 Terry Coldham : Basaltic corundum. A case for the promotion of increased cooperation between gemmological researchers and gemstone producers? 12.20-12.25 Announcements 12.25-14.00 Lunch Olivine, Jadeite (Chairlady Jayshree Panjikar) 14.00-14.20 Jaroslav Hyrsl, Historical use of olivine the origin of peridots in baroque-period jewellery 14.20-14.40 Thanong Leelawathanasuk et al.: Pallasitic peridot : The gemstone from Outer Space 14.40-15.00 Loredana Prosperi: Italian gemstones: Peridot from Sardinia,
Demantoid garnet from Val Malenco, Omphacite jade from the Po Valley, Piedmont, Amber from Sicily 15.00-15.20 Tay Thye Sun et al.: Preliminary studies to distinguish omphacite from jadeite 15.20-15.40 Edward Boehm: Recent coloured gemstone production & market trends 15.40-16.00 Coffee break Canadian gemstones (Chairman Visut Pisutha-Arnond) 16.00-16.20 Willow Wight: Rare gemstones from Mont Saint-Hilaire, Québec, Canada 16.20-16.40 Karen Fox: New Canadian occurrences of gem scapolite and demantoid 16.40-17.00 Bradley Wilson: Gemstones from southern Baffin Island, Nunavut, Canada 17.00 Conference day closes 18.30 Apéritif and Dinner at Restaurant Spycher, Congress Centre Interlaken 08.00-08.45 EXECO meeting Sunday 17 July Testing Techniques (Chairman Emmanuel Fritsch) 9.00-9.30 Prof Thomas Pettke: LA-ICP-MS and its applications in gemmology 9.30-9.50 Pornsawat Wathanakul et al.: AFM: an alternative technique for indicating gem treatments 9.50-10.10 Manfred Eickhorst: Putting LEDs to work for gemmology 10.10-10.30 Michael Hügi: The characteristics of digital photography applied to photomicrography of gemstone inclusions 10.30-10.50 Coffee break Rare stones, Organic materials (Chairlady Margherita Superchi)
10.50 11.10 Sutas Singbamroong et al.: Gem characterization of sérandite from Québec, Canada 11.10-11.30 Michael Gray: The care and handling of large gemstones 11.30-11.50 Stephen Webb et al.: An organic gem material of proposed name rostellite derived from the fossilized beaks of whales of the family Ziphiidae 11.50-12.10 Stefanos Karampelas: Identification of organic gems from endangered species: An overview 12.10-12.15 Announcements 12.15-14.00 Lunch 14.00-15.00 Conference closing ceremony 15.00 Conference ends 15.15-15.45 Execo meeting (if needed) POSTERS 5 min presentation per author Thursday, 14 July 15.05 Wilawan Atichat et al.: Mozambique ruby: Indication of low-temperature heat treatment 15.10 Edward Boehm: A photo collage in memory of Dr. Edward J.Gübelin and the many years of his participation in the International Gemmological Conferences and excursions 15.15 George Bosshart: Do bi-coloured green and blue beryls exist, which consist of emerald and aquamarine zones? 15.20 Emmanuel Fritsch et al.: Cr 3+ -green common opal from Turnali, Northeastern Turkey 15.25 Henry Hänni et al.: A portable Raman system for gemstone identification: The GemExpert Raman probe 15.30 Franz Herzog et al.: Colour by Rare Earth elements, as exemplified by a colour changing bastnäsite from Pakistan
Friday, 15 July 13.35 Arunas Kleismantas: XVIIth century doublets in liturgical items 13.40 Francine Payette et al.: Gem-quality green and blue tourmaline from a Coolgardie pegmatite, Western Australia. 13.45 Boontawee Sripasert et al.: Properties of blue spinel from Sri Lanka 13.50 Elizabeth Su: Jadeite trading in China 13.55 Chakkapan Suthirat et al.: Fancy sapphires from Deniyaya deposit, southern Sri Lanka 14.00 Panjawan Thanasuthipitak et al.: Bi-coloured sapphires from basaltic and metamorphic affiliations 14.05-14.10 F. Eigenmann: Bruker FTIR