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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An overview of the Spring 2016 Gems & Gemology content.
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An overview of the Winter 2015 Gems & Gemology content.
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Colombia’s unique trapiche emeralds exert a fascination for many gemmologists.
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A report on the chemical and mineralogical analysis of samples’ solid inclusions.
Read MoreCriteria for distinguishing emerald filling substances were investigated.
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Emeralds are again being mined in the historic district of the Ural Mountains. Physical, chemical, spectroscopic and microscopic characteristics of stones from the recent production are presented and compared with data on older samples as well as those reported in the literature.
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With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.
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Natural and synthetic emeralds are studied to identify the chemical differences between them.
Read MoreThis article reports on three gem materials currently being mined in Pakistan.
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