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.
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Three-Phase Inclusions in Emerald and Their Impact on Origin Determination
Sudarat Saeseaw, Vincent Pardieu, and Supharat Sangsawong, July 25, 2014
Discusses the role of three-phase inclusions in emerald, in combination with spectroscopy and trace-element analysis, in determining geographic origin.
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Agates from Sidi Rahal, in the Atlas Mountains of Morocco
Magdalena Dumanska-Słowik, Lucyna Natkaniec-Nowak, Aleksandra Wesełucha-Birczynska, Adam Gaweł, Marek Lankosz, and Paweł Wróbel
, October 22, 2013
A report on the chemical and mineralogical analysis of samples’ solid inclusions.
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Purplish Pink Spinel from Tajikistan: Before and After Cutting
Nicholas Sturman, March 1, 2009
Purplish Pink Spinel from Tajikistan: Before and After Cutting
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Characterisation of the New Malossi Hydrothermal Synthetic Emerald
Ilaria Adamo, Alessandro Pavese, December 1, 2005
A new production of hydrothermal synthetic emeralds.
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Emeralds from the Kafubu Area, Zambia
J. C. (Hanco) Zwaan, Antonín V. Seifert, June 1, 2005
Zambia is considered the world’s second most important source of emeralds by value (after Colombia).
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Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory
Shane F. McClure, Thomas M. Moses, December 1, 1999
One of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents
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On the Identification of Various Emerald Filling Substances
Mary L. Johnson, Shane Elen, June 1, 1999
Criteria for distinguishing emerald filling substances were investigated.
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Characterisation of Chinese Hydrothermal Synthetic Emerald
Karl Schmetzer, Lore Kiefert, December 1, 1997
Synthetic emeralds grown hydrothermally in an alkali-free, chlorine-bearing solution have been manufactured in Guilin, China, since 1987.
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Update on Emeralds from the Sandawana Mines, Zimbabwe
J.C. (Hanco) Zwaan, Jan Kanis, June 1, 1997
Zimbabwe’s Sandawana mines have been an important producer of emeralds for 40 years.
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