the quarterly journal of the gemological institute of america
In This Issue
The Very Deep Origin of the World’s Biggest Diamonds
The Drehers and Their Extraordinary Carvings
Australian Akoya Pearls
Accurate Reporting of Trace Elements in Corundun Using Matrix-Matched Standards
Real-Time Microradiography of Pearls: Comparison of Detectors
Ruby Inclusions Chart
Previous Issue
the quarterly journal of the gemological institute of america
The World’s Biggest Diamonds: Windows into the Earth’s Deep Mantle
Duncan Pay, Editor-in-Chief
An overview of the Winter 2017 Gems & Gemology content.
Articles (6)
Gem Virtuosos: The Drehers and Their Extraordinary Carvings
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
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The Very Deep Origin of the World’s Biggest Diamonds
Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed), that formed in a superdeep environment.
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Akoya Cultured Pearl Farming in Eastern Australia
Characterizes the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata mollusks.
Read MoreAccurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
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 MoreReal-Time Microradiography of Pearls: A Comparison Between Detectors
Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
Read MoreChart: Inclusions in Natural, Synthetic, and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic, and treated rubies.
Read MoreRegular Features
Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (12)
MOST VALUABLE ARTICLE AWARD
Jaipur, India: The Global Gem and Jewelry Power of the Pink City
Andrew Lucas, Nirupa Bhatt, Manoj Singhania, Kashish Sachdeva, Tao Hsu, and Pedro Padua
An Introduction to Photoluminescence Spectroscopy for Diamond and Its Applications in Gemology
Sally Eaton-Magaña and Christopher M. Breeding
Chart: Inclusions in Natural, Synthetic, and Treated Emerald
Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley
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