Research TrackCOLORED STONES AND PEARLS 2

Tuesday, October 9, 2018
9:00 AM - 10:30 AM
Sunset Ballroom


Overview

Tourmaline: A Gemstone's Guide to Geologic Evolution


Details

Tourmaline offers an astonishing array of insights into the earth’s geological processes, especially through its rich variety of chemical compositions. These fingerprints reveal the complete picture of a tourmaline’s growth environment and processes. This talk will examine how established and cutting-edge techniques can be used to unravel the story recorded in each specimen.


Speakers

DR. GREGORY HODGINS

Director

University Of Arizona Accelerator Mass Spectrometry Laboratory

RADIOCARBON MEASUREMENTS ON PEARLS: PRINCIPLES, COMPLEXITIES, AND POSSIBILITIES

Biography

Dr. Greg Hodgins is the director of the University of Arizona Accelerator Mass Spectrometry Laboratory, in Tucson, Arizona. The laboratory is a world leader in cosmogenic isotope measurements, specializing in 14C, 10Be, 129I, and 26Al. These isotopes are utilized in a wide range of disciplines spanning geoscience, oceanography, atmospheric science, meteoritics, archaeology, and forensic science. Dr. Hodgins is a specialist in archaeological and forensic radiocarbon dating and the development of new applications for radiocarbon measurement.


DR. ZEMIN LUO

Assistant Professor

Gemmological Institute of China University of Geosciences (Wuhan)

QUANTITATIVE IDENTIFICATION OF GREEN NEPHRITE FROM FIVE MAJOR ORIGINS IN ASIA AND NORTH AMERICA

Biography

Dr. Zemin Luo is a lecturer at the Gemological Institute, China University of Geosciences in Wuhan. Her research experience in mineralogy and gemology includes the geological origin study of dolomite-related white nephrite using trace elements and machine learning tools. Her current research focus is on building a database to quantitatively characterize the color and chemical components of serpentine-related green nephrite, and developing a classification model based on this database to predict the geological origin of ancient green jade. Dr. Luo holds a PhD in geology from Peking University.


DR. CLAUDIO MILISENDA

Managing Director

DSEF German Gem Lab

GEMSTONES AND PHOTOLUMINESCENCE

Biography

Dr. Claudio Milisenda has been with the German Gemmological Association (DGemG) and its gemological laboratory since 1993. In 1996, he became managing director of the DSEF German Gem Lab. Dr. Milisenda serves as an editor of the journal of the German Gemmological Association. He has conducted on-site research in Europe, Africa, and Southeast Asia and received his PhD in earth science from Max-Planck Institute for Chemistry in Mainz, Germany.


DR. AARON PALKE

Senior Research Scientist

GIA Carlsbad

WHAT IS COBALT SPINEL? UNRAVELING THE CAUSES OF COLOR IN BLUE SPINELS

Biography

Dr. Aaron Palke is a senior research scientist at GIA in Carlsbad, California. Dr. Palke started his career in gemology in 2014 as a postdoctoral research associate at GIA after earning his PhD in geology from Stanford University. During this time, Dr. Palke investigated the geological history of gem corundum by analyzing their inclusions. He currently helps lead GIA’s colored stone research in country-of-origin determinations and treatment identification.


CHUNHUI ZHOU

Manager, Pearls Research Scientist

GIA New York

UNCONVENTIONAL TECHNIQUES IN PEARL TESTING: THEIR POTENTIAL AND LIMITATIONS

Biography

Chunhui Zhou is a research scientist and manager of pearl identification at GIA’s New York laboratory. He obtained his bachelor’s degree in environmental chemistry from State University of New York at Binghamton. Subsequently he earned his doctorate degree in bio-molecular chemistry from New York University prior to joining GIA in 2010. He also received GIA Graduate Gemologist diploma in 2015. Dr. Zhou’s main area of interest is identification and research of pearls and related materials, and he has made many contributions to various gemological and scientific journals.