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Citrine from Zambia
Nanoscale Techniques for Characterizing Gemstone Coatings: A Case Study on Synthetic Moissanite
Provides a basis for analyzing colored coatings on a variety of polished gemstones.
Tairus Hydrothermal Synthetic Sapphires Doped with Nickel and Chromium
Diamond Identification
Liberian Ruby
A trip to a rural Liberian diamond mining community results in a newly discovered source of corundum.
Gemological Characteristics of Saltwater Cultured Pearls Produced After Xenotransplantation
Anahí’s “New” Ametrine
The Anahí mine in southeastern Bolivia has enjoyed consistent production since 1990 and is best known for its ametrine.
History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival records.
An Interesting Rose Quartz from Madagascar
A new find of rose quartz from Madagascar contained some unusual inclusions.
Demantoid Garnet with Giant Fluid Inclusion
