Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
Jennifer Stone-Sundberg, Timothy Thomas, Ziyin Sun, Yunbin Guan, Zachary Cole, Randy Equall, and John L. Emmett, January 26, 2018
Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
Read More
Gem Virtuosos: The Drehers and Their Extraordinary Carvings
Robert Weldon, Cathleen Jonathan, and Rose Tozer, January 26, 2018
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
Read More
Photoluminescence Spectra of Emeralds from Colombia, Afghanistan and Zambia
D. Brian Thompson, Christian J. Bayens, Matthew B. Morgan, Taylor J. Myrick, and Nealey E. Sims, November 8, 2017
Compares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin determination.
Read More
Observations on HPHT-Grown Synthetic Diamonds: A Review
Sally Eaton-Magaña, James E. Shigley, and Christopher M. Breeding, November 8, 2017
Summarises statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.
Read More
Characterisation of Mg and Fe Contents in Nephrite Using Raman Spectroscopy
Xiaoyan Feng, Yong Zhang, Taijin Lu, and Hui Zhang, August 7, 2017
Evaluates the usefulness of Raman spectroscopy in distinguishing the colour varieties of nephrite based on the relative ratio of Mg to Fe concentration.
Read More
Jaipur, India: The Global Gem and Jewellery Power of the Pink City
Andrew Lucas, Nirupa Bhatt, Manoj Singhania, Kashish Sachdeva, Tao Hsu, and Pedro Padua, January 26, 2017
Examines Jaipur’s role as a coloured stone cutting and jewellery manufacturing centre, with profiles of 17 companies and their factory, trading and retail operations.
Read More
An Introduction to Photoluminescence Spectroscopy for Diamond and Its Applications in Gemmology
Sally Eaton-Magaña and Christopher M. Breeding, April 28, 2016
Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.
Read More
Origin Determination of Dolomite-Related White Nephrite through Iterative-Binary Linear Discriminant Analysis
Zemin Luo, November 22, 2015
A technique for origin identification based on statistical analysis and LA-ICP-MS spectrometry.
Read More
A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy
Le Thi-Thu Huong, Wolfgang Hofmeister, Tobias Häger, Stefanos Karampelas, and Nguyen Duc-Trung Kien, January 30, 2015
Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.
Read More
Book Review: From a Snowflake to an Iceberg: The McFerrin Collection
Dorothy McFerrin, publ. by the McFerrin Foundation, College Station, Texas, 2013, US $125, October 19, 2013
By Dorothy McFerrin, publ. by the McFerrin Foundation, College Station, Texas, 2013, US $125 (£74)
Read More
