宝石ニュース·インターナショナル Gems & Gemology, Volume 48, No. 3

Fall 2012 Gem News International


Colored Stones and Organic Materials
            Beryl from Kaduna State, Nigeria
            Green and Orangy Yellow Calcite from Pakistan
            Citrine from Zambia
            Emerald from Ethiopia
            Emerald from Sumbawanga, Tanzania
            Gold in Trondhjemite Matrix Rock
            Hemimorphite from China
            Update on Some Mogok Gem Mines and Markets
            Rainbow Moonstone from Madagascar
            Yellow Muscovite from Brazil
            Blue Opal from Arizona Showing Play-Of-Color
            Yellow Opal from West Africa
            Quartz with Green Rutile Inclusions
            Quartz from Tanzania with Red Epidote-Piedmontite Inclusions
            Unusual Trapiche Sapphire
            Stichtite-Dominated Intergrowths with Serpentinite from Tasmania
            Zoisite from Pakistan
            Pink to Purple Zoisite from Merelani, Tanzania
Synthetics and Simulants
            Artistic Cutting of Russian Synthetic Moissanite
            “True” Red Synthetic Spinel Grown By a “Pulled” Technique in Russia
Miscellaneous
            Automated Colored Stone Cutting
 
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