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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.

Fall 1992, Volume 28, Issue 3

 

EDITORIAL

Letters p.149-p.150
1992 "Perfect" Challengers p.151

FEATURE ARTICLES

Status of Ruby and Sapphire Mining in the Mogok Stone Tract p.152-p.174
Robert E. Kane and Robert C. Kammerling
Identification of Bleached and Polymer-Impregnated Jadeite p.176-p.187
Emmanuel Fritsch, Shun-Tien Ten Wu, Thomas Moses, Shane F. McClure, and Mike Moon

NOTES AND NEW TECHNIQUES

Unstable Radiation-Induced Yellow-Green Color in Grossular Garnet p.188-p.191
Kurt Nassau, George R. Rossman, and Darwin L. Wood

REGULAR FEATURES

Gem Trade Lab Notes p.192-p.197
Gem News p.198-p.208
Book Reviews p.210

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