Fall 2009 Gem News International

Diamonds
            A Greenish Yellow Diamond with Glass Filling and HPHT Treatment
Colored Stones and Organic Materials
            Aquamarine with Ocean-Themed Inclusions
            “Smoky” Gray Beryl
            Chalcedony from Oregon with Pyrite and Cloud-Like Green Areas
            Demantoid from Ambanja, Madagascar
            Enstatite from Pakistan
            Common Opal from Argentina
            Mabe Pearls from Vietnam with Seashell Nuclei
            Characterization of Some Pearls of the Pinnidae Family
            Cat’s-Eye Phenakite
            Color-Change Pyrope-Spessartine from Kenya
            Preliminary Observations on New Rubies from Mozambique
            Yogo Sapphire Update
            Topaz with Unstable Brown Color
            New Tourmaline Production from Keffi, Nigeria
            “Lilac”-Colored Cu-Bearing Tourmaline from Nigeria
            Triphylite from Brazil
Synthetics and Simulants
            Colorless Synthetic Sapphire Imitating Rough Diamond
Miscellaneous
            Update on Myanmar Gems
Conference Reports
            3rd European Gemmological Symposium
Announcements
            CIBJO Resources for Retailers
            Gem Cutting Notes Available
 
To view the full section, download the PDF above.           
           

DATA DEPOSITORY

Demantoid from Ambanja, Madagascar - Additional Photos 
Enstatite from Pakistan - Photomicrographs and Absorption Spectra
New Tourmaline Production from Keffi, Nigeria - Average Chemical Composition of Tourmaline by Electron Microprobe
Colorless Petalite and Pollucite from Laghman, Afghanistan - Faceting Notes
Fall, 2009