Fall 2002 Gem News International
Gem Localities and Formation
New Technologies and Techniques
Detection of Treatment in Two Unusual Green Diamonds
Natural-Color Purple Diamonds from Siberia
Twelve natural-color purple diamond crystals from Siberia were studied using spectroscopic methods to better understand their color and its causes.
A History of Diamond Treatments
Gem Characterization
Diamond Geology
Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil
In 2006, emeralds were discovered in the Fazenda Bonfim region of northeastern Brazil.
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