宝石ニュース·インターナショナル Gems & Gemology, Spring 1996, Volume 32, No. 1

Spring 1996 Gem News International


TUCSON ‘96
Diamonds
            Matrix Diamond Specimens from China and Russia
            Synthetic Diamonds Are in the Marketplace
            Synthetic Moissanite as a Diamond Simulant
Colored Stones
            Color-Change Garnet
            Heliodor from Tajikistan
            "Leopard Opal" from Mexico
            Cultured Abalone Pearls
            Update on Namibian Spessartine
            Large Taaffeite Crystal from Sri Lanka
            Tanzanite Beads
            Gem Materials from the New Locality at Tunduru, Tanzania
Enhancements
            Update on Polymer-Impregnated Malachite
Synthetics and Simulants
            Beryl Triplets Imitating Paraiba Tourmaline
            Faceted Quartz Construct
MORE FROM THE 25TH INTERNATIONAL GEMMOLOGICAL CONFERENCE
Diamonds
            Fingerprints of Natural Diamonds: Observations with Cathodoluminescence
Colored Stones and Organic Materials
            Mineral Inclusions in Quartz
            Montana Sapphires
            Sapphires and Rubies from Laos
Enhancements
            Durability of Polymer-Impregnated (B-Type) and Natural Jadeite
Instrumentation
            Infrared Spectroscopy of Thai Rubies and Sapphires
            Infrared Spectroscopy Distinguishes Synthetic from Natural Emerald and Quartz
Miscellaneous
            Gems from Archeological Excavations in Rome (Crypta Balbi)
            Gems in a Visigoth Treasure
Announcements
            Treasures of Mexico Exhibit at the Houston Museum
 
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