Gemologists team at Nantes

The team of gemologists at Nantes is made of university teachers and researchers. We work a lot with local partners (private consultants) and lab gemologists all over the world.

Emmanuel Fritsch

dr-emmanuel-fritschDr. Emmanuel Fritsch, G.G., is professor of physics aht the university of Nantes since 1995.  He obtained his PhD in geophysics and internal geodynamics at the university of Paris VII in 1985, on the coloration of industrial silica glasses by impurities. Then he joined the GIA team (Gemological Institute of America), fist as a post-doc fellow, then Research gemologist. He was manager of the Research from 1993 to 1995. He is now in charge of the several gemological programs at Nantes, including the DUG in which he is the master teacher. On the research side, he works on many gemological topics: the origin of color in gems (especially diamond), the use of spectroscopic methods for gemological problems, and the relationship between properties of gems and the geological conditions of their formation. He recently focused on opals and pigments in pearls and corals (see our publications). Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Benjamin Rondeau

benjamin-rondeauDr. Benjamin Rondeau is Professor-Assistant at the Planetology and Geodynamics lab of the University of Nantes, gemologist and mineralogist. He obtained his DUG diploma in 1998 on the structure and coloration of common opals, then his PhD in 2003 on the interest of natural history collections for research in gemology. He has been working at the National Museum of Natural History (Paris, France) from 1999 to 2007 as curator-assistant on gems, minerals and rocks collections. He co-organized numerous exhibitions including DIAMONDS in 2001. He joined the GemTeam at Nantes in 2007. His research areas include geology of gems (diamond and opal as favorites) and the link with provenance determination.

Bernard Lasnier

bernard-lasnierBernard Lasnier, Emeritus professor, spent all his career at the university of Nantes. He is a petrologist of deep crustal and mantellic rocks. He turned toward gemology during the 80's, as he began to work on the gitology of gem deposits (mostly corundum). Bernard Lasnier founded the DUG in 1982 in response to the demand of professional jewelers. In 1987, he also created the CRG, Centre de Recherches  Gemmologique, association initially aimed to keep contact between ancient students.  He continues to preside this association today. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Thomas Hainschwang

thomas-hainschwangDr. Thomas Hainschwang came into gemology by opening an expertise laboratory in Liechtenstein, "Gemlab", in 1999. Then he joined Franck Notari at the GIA Switzerland in Geneva, during the few years this lab did exist. In summer 2007, he took back the head of "gemlab", that later merged with Gemtechlab to create GGTL laboratories (Gemlab-GemTechLab) in 2011. He obtained his DUG diploma in 2003 on the origin of color in brown diamond, and his PhD in 2014 on type Ib natural diamond. In the meantime, he did not stop his partnership with Nantes for gemological research. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Boris Chauviré

boris-chauvireDr. This email address is being protected from spambots. You need JavaScript enabled to view it. followed a cursus in geology and gemology at the University of Nantes. His PhD focused on the genesis of opal at the surface of the Earth crust and how this can help interpreting geology on Mars. His Master's degree (2012), conducted in the field together with Vincent Pardieu (GIA Bangkok Laboratory), focused on the geological and gemological characterization of blue spinel from Luc Yen (North Vietnam). He also passed his DUG diploma (2012) on the genesis of gem opal by alteration of ultramafic geological units. He received the 2016 Gübelin Schloarship for a study on opal stability. Contact: This email address is being protected from spambots. You need JavaScript enabled to view it.

Blanca Mocquet

blanca-mocquetBlanca Mocquet is a geologist-engineer from Venezuela. She also obtaind a Master degree in geology at the university of Rennes I, France. She teaches classical gemology at Saumur, where she previously learnt about gemology. She obtained her DUG diploma in 2001 on the determination of archaelogical objects kept in Museums. She is a strong actor of the CRG Association, and participates to our gemological publications. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Yves Lulzac

yves-lulzacYves Lulzac is a geologist-engineer, now retired. He begn his career with prospecting unranium, then joined the BRGM (Bureau de Recherches Géologiques et Minières) as mining geologist, for tin, tungsten, gold... He learnt about gems on his own, so well that he could publish a very sharp "manual of determination of faceted gemstones" (in French). He participates to the gemological activities at the university as external consultant. Rare privilege, a new mineral species has been named after him: the lulzacite. This is a strontium phosphate forming dark green crystals, few centimeters long. Otherwise, Yves Lulzac focuses on ancient architecture in Britanny, and published 5 books on this topic. If you want to buy the "Manual of determination of faceted gemstones", contact the author: +33 1 40 74 07 57.

Stefanos Karampelas

Stefanos-KarampelasDr. This email address is being protected from spambots. You need JavaScript enabled to view it.  is research director at DANAT (Bahrain Institute for Pearls and Gemstones) after seven years working as researcher at the Gübelin Gem lab and one year at the Gem Research Swisslab (GRS) both in Switzerland. He first followed a geological cursus at the university of Thessaloniki, Greece, then a Masters Degree at the University of Rennes, France, on the separation between natural and synthetic amethyst. He then obtained his DUG diploma in 2007 on unusual infrared absorptions of diamond in the one-phonon zone, then his PhD in 2008on the detection of treatment of pearls (thesis co-directed with the University of Thessaloniki and Pr. E. Fritsch, University of Nantes). his favorite research topics focus on pearls (natural versus cultured, natural versus treatment color, structure of non-nacreous pearls...) and how non-destructive methods may help in various gemmological issues. He also teaches some courses in the DUG program. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Franck Notari

franck-notariFranck Notari created GemTechLab in Geneva,Switzerland, in 1998. He was Research Manager and Laboratory Manager for GIA during two years. Since 2011, the lab merged with Gemlab to form GGTL Laboratories, co-directed by himself and Thomas Hainschwang. He strongly supports research activities at Nantes by providing samples, books, and employing students from Nantes. He published numerous articles in collaboration with Nantes, in particular on diamond (asteriated diamonds, CO2 diamonds, pink and brown diamonds...) and color stones (spinel, tanzanite, euclase...). He is also lecturer for the DUG program on treatments detection (corundum, tanzanite, black diamond), synthetic spinel, and Padparadscha sapphire (topic of his DUG diploma). Contact: http://www.ggtl-lab.org/

Jean-Pierre Chalain

jean-pierre-chalainJean-Pierre Chalain is gemologist and specialist of diamond. Hi got his DUG diploma in 1992, and then joined the SSEF (Basel, Switzerland) where hi is now Head of Diamond department. He shares his time between expertise, research, teaching, and relations between labs and market (CIBJO, LMHC, etc.). He is involved in research on diamond conducted at Nantes (black diamond, asteriated diamonds, HPHT-treated diamond) and often provides samples for research. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Cédric Simonet

cedric-simonetDr. Cédric Simonet followed the Geology cursus at the university of Nantes, while following the DUG program. He specialized in geology of corundum. On this topic, he obtained his DUG diploma in 1997, then his PhD thesis in 2000 under the direction of Pr. Bernard Lasnier. All his gemology-geology work is linked to his professional situation: after his Master Degree, Cédric Simonet joined the John Saul Ruby Mine in Kenya. He managed the mine until 2002. Then he came back in France as mining geologist for the fluorite mine in Tarn, France. The mine closed in 2007, he turned back in Kenya to create a prospecting and mining exploration society for gold and gemstones. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Eloïse Gaillou

dr-eloise-gaillouDr.  Eloïse Gaillou followed a geological cursus at the university of Nantes and  Clermont-Ferrand (France), and then focused on gemology. She got her DUG diploma in 2005 on "photoinduced absorptions in diamond". Then she was PhD student under the direction of Pr. Fritsch on opals (properties and conditions of formation). She was then Post-doc fellow at the Smithsonian Institute, and then at the Carnegie Institution, Washington D.C. , where she worked on the origin of pink color in natural diamonds and on the properties of blue diamonds. She also was curator of Earth Sciences collection of the Museum of Natural History of Los angeles, USA. Shis now curator of the Earth sciences collection at the Mines Museum in Paris, France. Contact : This email address is being protected from spambots. You need JavaScript enabled to view it.

Laurent Massi

laurent-massiInitially  student in organic chemistry, Dr. This email address is being protected from spambots. You need JavaScript enabled to view it. then turned toward inorganic chemistry. He discovered gemology at this occasion, by meeting Pr. Fritsch. He got his DUG diploma in 1999 on "diffusion in corundum". He passed his PhD in 2006 at the university of Nantes on "defects in brown diamonds and hydrogen-rich diamonds". Dr. Laurent Massi has been director of the AIGS lab (Asian Institute of Gemological Sciences), as well as director of the Education program of the AIGS Gemology school, both in Bangkok, Thailand. More details on Dr. Laurent Massi and the AIGS.

 

 

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