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