|
Back Issues
Back issues of Gems & Gemology may be purchased individually, or save by buying one-, three-, or five-year sets. Use our online order form or contact our Subscriptions/Back Issues Office at dortiz@gia.edu. Call toll-free nationwide 800-421-7250, ext. 7142. Outside the U.S., call 760-603-4000, ext. 7142.
Winter 1999, Volume 35, Issue 4
EDITORIAL
Gems & Gemology Turns 65 p.173
Richard T. Liddicoat and Alice S. Keller
FEATURE ARTICLES
Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory p.176-p.185
Shane F. McClure, Thomas M. Moses, Maha Tannous, and John I. Koivula
NOTES AND NEW TECHNIQUES
Clues to the Process Used by General Electric to Enhance the GE POL Diamonds p.186-p.190
Karl Schmetzer
Diopside Needles as Inclusions in Demantoid Garnet from Russia: A Raman Microspectrometric Study p.192-p.195
Michael S. Krzemnicki
Garnets from Madagascar with a Color Change of Blue-Green to Purple p.196-p.201
Karl Schmetzer and Heinz-Jürgen Bernhardt
REGULAR FEATURES
Gem Trade Lab Notes p.202-p.207
Lab Notes highlight: Yellow to yellow-green diamonds treated by HPHT p.203-p.204
Thomas Moses and Ilene Reinitz
Gem News highlight: Can Angolan diamonds be identified by country of origin? p.208-p.209
Gem News p.208-p.223
Book Reviews p.224-p.225
Gemological Abstracts p.226-p.234
1999 Subject Index (A - L) p.235-p.238
1999 Subject Index (M - Z) p.238-p.240
1999 Author Index p.240-p.242
About the Cover
| 
