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Gems & Gemology
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.
Table of Contents
Winter 2006, Volume 42, Issue 4
EDITORIAL
Remembering G. Robert Crowningshield p.95-p.96
FEATURE ARTICLES
The Impact of Internal Whitish and Reflective Graining on the Clarity Grading of D-to-Z Color Diamonds at the GIA Laboratory p.206-p.220
John M. King, Thomas M. Moses, and Wuyi Wang
Identification of "Chocolate Pearls" Treated Ballerina Pearl Co. p.222-p.235
Wuyi Wang, Kenneth Scarratt, Akira Hyatt, Andy Hsi-Tien Shen, and Matthew Hall
NOTES & NEW TECHNIQUES
"Leopard Opal": Play-of-Color Opal in Vesicular Basalt from Zimapán, Hidalgo State, Mexico p.236-p.246
Robert Raymond Coenraads and Alfonso Rosas Zenil
The Cause of Iridescence in "Rainbow" Andradite from Nara, Japan p.248-p.258
Thomas Hainschwang and Franck Notari
REGULAR FEATURES
Lab Notes p.260-p.267
Featured Lab Note: Lizards in Imitation Amber p.260-p.261
Gem News International p.268-p.292
Featured Gem News International: Update on Diamond Trading in Sierra Leone p.268-p.270
Featured Gem News International: Diopside from Afghanistan. p.272-p.273
Book Reviews p.294-p.296
Gemological Abstracts p.297-p.308
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