From Single Source to Global Free Market: The Transformation of the Cultured Pearl Industry
Over the past 15 years a combination of market forces, environmental events, and scientific research has radically changed the cultured pearl industry.
Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil
In 2006, emeralds were discovered in the Fazenda Bonfim region of northeastern Brazil.
The Santa Terezinha De Goias Emerald Deposit
Emeralds of the Panjshir Valley, Afghanistan
Abstracts; Spring 1994
This article, from the Spring 1994 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.
The Anahí Ametrine Mine, Bolivia
“Paraíba”-Type Copper-Bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting By LA-ICP-MS
Gem-quality bright blue to green “Paraíba”-type Cu-bearing tourmaline is now known from deposits in Africa (Nigeria and Mozambique), in addition to three commercial localities in Brazil (in Paraíba and Rio Grande do Norte States).
Anahí’s “New” Ametrine
The Anahí mine in southeastern Bolivia has enjoyed consistent production since 1990 and is best known for its ametrine.
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
An Opal-Calcite Composite
Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam
Characterization of Colorless Coated Cubic Zirconia (Diamantine)
Trapiche Tourmaline from Zambia
Well-formed crystals of green tourmaline from northwestern Zambia show a growth pattern reminiscent of trapiche emerald/ruby when sliced perpendicular to the c-axis.
An Era of Sweeping Change in Diamond and Colored Stone Production Markets
The diamond, colored stone, and pearl businesses have witnessed unprecedented change since the turn of the 21st century.
Imitation Rubellite Boulders
Dyed Green Beryl
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