The Chinese Soul in Contemporary Jewelry Design
Amethyst from Boudi, Morocco
An introduction to Moroccan amethyst, which features distinctive color zoning and inclusions.
Visible Absorption Spectra of Colored Diamonds
Mozambique: A Ruby Discovery for the 21st Century (英语)
Explores the geology, production, and yield of the world’s most commercially important ruby deposit.
Blue Spinel from the Luc Yen District of Vietnam (英语)
Offers geological context and gemological characterization of this increasingly popular vivid blue spinel from northeast Vietnam.
Chrysocolla In Quartz
A gemological examination of chrysocolla in quartz from Tucson’s AGTA show.
Chinese Freshwater Pearl Culturing, Overall Market Summary
New Production of Brazilian Emerald from Minas Gerais
Emerald from the Belmont and Montebello mines of Minas Gerais, Brazil seen at the GJX show in Tucson.
Colored Gems, Chinese Jewelry Designers, and Colored Diamond Spectra
Amethyst From Morocco:An Update
GIA’s Bangkok lab investigates the gemological properties of Moroccan amethyst.
Cultured Pearl Market Update
An up-close look at the cultured pearl’s role in the gem and jewelry industry.
Large HPHT-Grown Synthetic Diamonds Examined in GIA’s Hong Kong Laboratory (英语)
Examination of the largest HPHT synthetic diamonds GIA has examined so far demonstrated significant progress in this growth technology.
Conservation Concerns over Use of Tridacna Shell in Imitation Pearls
The New York lab investigates the use of the shells of Tridacna species as imitation pearls.
Exceptional Red Spinels and Fine Aquamarine
Large and Unusual Gems
High-End Colored Gems
Ginger Garnet, “Fancy” Tanzanite
Fine Corundum, Demantoid Garnet
Fine Tsavorite and Spinel
Exceptional stones are recirculated and new production is showcased at the AGTA show in Tucson.
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