Press Release

Geologist to Discuss Emerald and Corundum Origin

GIA’s next Gemstone Gathering is Jan. 28 in Bangkok

BANGKOK – Jan. 20, 2015 – How and where gems form are topics of interest for scientists, the gem and jewelry trade, and consumers alike. Gaston Giuliani, research director at the Institute of Research for Development in France, will discuss isotopic signatures and fluid inclusions in emerald and corundum with regards to their geological origin during GIA’s (Gemological Institute of America) Gemstone Gathering in Bangkok on Jan. 28.
Guiliani’s presentation will cover the geology and genesis of gem corundum and emerald deposits, including their main characteristics and classifications. Detailed descriptions of the geology, mineralogy and structures of the deposits over the last century have provided a foundation for today’s field and laboratory research, which includes petrography, mineralogy, gemology, fluid inclusions, and stable and radiogenic isotopes. Descriptive geology coupled with recent advancements provide insight into how some of these historical deposits formed and more clues into their geologic and sometimes their geographic origins.
Guiliani, a geologist with more than 40 years of experience, is recognized as a leading researcher in geology-geochemistry. His research covers various topics, including fluid inclusions and stable isotopes applied to Metallogeny; geology and genesis of gemstone deposits; archeology of emerald artifacts by isotopic analysis; corundum deposits in Madagascar; ruby deposits in marbles from Asia; tsavorite deposits in Mozambique; and origin determination of emeralds based on oxygen isotopic composition. He holds a PhD in geology from the University of Nancy and his work has appeared in nearly 200 publications.
GIA’s Gemstone Gathering, a free event, begins at 6 p.m. on Jan. 28 in the “Crowne Room 1-3” on the 21st floor of the Crowne Plaza Hotel, Lumpini Park in Bangkok.

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