Gem News International Gems & Gemology, Spring 2000, Volume 36, No. 1

Spring 2000 Gem News International


Tuscon 2000
Colored Stones and Organic Materials
            Amphiboles are Not Necessarily Jade
            Chitons in Jewelry
            Unusual Copal
            Newly Commercial Emerald Deposits in Colombia (La Pita and Polveros)
            Some New Examples of Drusy Hematite
            Orbicular Jasper from Madagascar
            Colorful Nephrite
            Tahitian and Australian “Keshi” Pearls
            Pyritized Ammonite from Russia, Sliced in a New Way
            An Update on Ruby and Sapphire from Chimwadzulu Hill, Malawi
            Another Locality in Paraíba for Cuprian Elbaite
            Tugtupite and Other Gem Materials from Greenland
            Large Faceted Zircon
Also Seen at Tucson (Including Gems & Gemology references)
            Pink and blue Madagascar sapphires (Summer 1999, Gem News, pp. 149-150)
            Nigerian pink tourmaline and rubellite (Winter 1998 Gem News, pp. 298-299)
            Spessartine (Spring 1999 Gem News p. 55; Winter 1999 Gem News, pp. 216-217)
            Multicolored sunstone from Oregon (Summer 1997 Gem News, p. 145)
            Russian demantoid garnets (Mattice et al., Fall 1999 G&G, pp. 151-152)
            Blue opal from Peru (Summer 1991, Gem News, pp. 120-121)
Treatments
            Moonstone with Dichroic Backing
            New Hues of Dyed Freshwater Cultured Pearls
            Heat-Treated Rubies: Glass or not Glass?
            Silicon Coating of Drusy Materials
Synthetics and Simulants
            Bicolored Synthetic Beryl, Resembling Tourmaline
Miscellaneous
            "Floating Diamonds” in Jewelry
            Bismuth Egg
Announcements
            GIA on the Internet
            Faceter’s Symposium 2000
            GANA Exhibit in Los Angeles
            Jewelry 2000
            Tourmaline 2000
            Gemstones at Upcoming Scientific Meetings
 
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