John M. King, Thomas M. Moses, and Wuyi Wang
Identification of "Chocolate Pearls" Treated by Ballerina Pearl Co.
Wuyi Wang, Kenneth Scarratt, Akira Hyatt, Andy Hsi-Tien Shen, and Matthew Hall
"Leopard Opal": Play-of-Color Opal in Vesicular Basalt from Zimap·n, Hidalgo State, Mexico
Robert Raymond Coenraads and Alfonso Rosas Zenil
The Cause of Iridescence in Rainbow Andradite from Nara, Japan
Thomas Hainschwang and Franck Notari
2006 Annual Index
Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).
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