宝石ニュース·インターナショナル Gems & Gemology, Volume 45, No. 4

Winter 2009 Gem News International


Colored Stones and Organic Materials
            Benitoite: Update on Faceting and Jewelry Manufacturing
            Large Cat’s-Eye Beryl from India
            Emeralds Recovered Using New Techniques at the Kagem Mine, Zambia
            Yellow Grossular from Tanzania
            A Most Unusual Blister Pearl
            Myanmar Cultured Pearl Production and New Gem Localities
            Phenakite from Nigeria
            Update on Rubies from Mozambique
            Transparent, Bright Blue Sodalite from Afghanistan
            Pseudo-Chatoyancy and Pseudo-Asterism in Sphalerite from Spain
            Update on Cu-Bearing Tourmaline Mining in Mozambique
            New Find Of Pink-To-Red Tourmaline in Nigeria
Synthetics and Simulants
            Hydrothermal Synthetic Emerald Sold as Natural Rough from Russia
            High-RI Barium-Zirconium Glass Imitation of Peridot and Other Gems
            Silicon Inclusions in Black Synthetic Moissanite
            Dyed Sillimanite as an Emerald Imitation
Treatments
            Dyed Pink Alabaster
Conference Reports
            31st International Gemmological Conference
            2009 NAG Institute of Registered Valuers’ Conference
 
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