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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Growth Method and Growth-Related Properties of a New Type of Russian Hydrothermal Synthetic Emerald
Karl Schmetzer, March 1, 1996
A new type of Russian hydrothermal synthetic emerald is produced.
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Gemmological Investigation of a New Type of Russian Hydrothermal Synthetic Emerald
John I. Koivula, Robert C. Kammerling, March 1, 1996
Tairus, in Novosibirsk, has produced yet another new type of Russian hydrothermal synthetic emerald.
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An Update on the Ural Emerald Mines
A. F. Laskovenkov and V. I. Zhernakov, June 1, 1995
The emeralds of the Ural Mountains, in what is now called the Russian Federation, have been known for more than 160 years.
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