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James E. Shigley, Dona M. Dirlam, Brendan M. Laurs, Edward W. Boehm, George Bosshart, and William F. Larson
Gemstone Enhancement and Detection in the 1990s
Shane F. McClure and Christopher P. Smith
Synthetic Gem Materials and Simulants in the 1990s
John I. Koivula, Maha Tannous, and Karl Schmetzer
Technological Developments in the 1990s: Their Impact on Gemology
Mary L. Johnson
Jewelry of the 1990s
Elise B. Misiorowski
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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