The quarterly journal of the gemological institute of america
EDITORIAL
Trapiche and More...
By Duncan Pay, Editor-in-Chief
A gemological curiosity or an object of beauty in its own right?
Articles (4)
TECHNIQUES
Origin Determination of Dolomite-Related White Nephrite through IB-LDA
A technique for origin identification based on statistical analysis and LA-ICP-MS spectrometry.
FORMATION
Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation
Proposes a model for trapiche emerald formation based on petrographic, spectroscopic, and chemical examination.
SYNTHETICS
Large Colorless HPHT-Grown Synthetic Gem Diamonds from New Diamond Technology, Russia
Examines a new source of colorless and near-colorless gem-quality HPHT synthetic diamonds using spectroscopic and gemological analysis.
LOCALITIES
Letseng’S Unique Diamond Proposition
Explores the history, geology, and current production of this unique source of large diamonds.
Regular Features
GEM NEWS INTERNATIONAL
Global coverage of gem sources, notable new gem materials, and recent industry developments.
2015
G&G CHALLENGE WINNERS
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