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Summer 1999, Volume 35, Issue 2

EDITORIAL

Nothing Is as Simple as It Seems p.79

FEATURE ARTICLES

On the Identification of Various Emerald Filling Substances p.82-p.107
Mary L. Johnson, Shane Elen, and Sam Muhlmeister
Sapphire and Garnet from Kalalani, Tanga Province, Tanzania p.108-p.120
Antonin V. Seifert and Jaroslav Hyrsl
Russian Synthetic Ametrine p.122-p.134
Vladimir S. Balitsky, Taijin Lu, George R. Rossman, Irina B. Makhina, Anatolii A. Mar'in, James E. Shigley, Shane Elen, and Boris A. Dorogovin

REGULAR FEATURES

1999 Challenge Winners p.135
Gem News p.136-p.141
Gem Trade Lab Notes p.136-p.141
Gem News highlight: GE-processed diamonds p.145
Thank You, Donors p.156
Book Reviews p.157-p.159
Gemological Abstracts p.160-p.172

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