The Gemological Properties of the De Beers Gem-Quality Synthetic Diamonds
James E. Shigley, Emmanuel Fritsch, Carol M. Stockton, John I. Koivula, C. W. Fryer, Robert E. Kane, David R. Hargett, and Clayton W. Welch
The History and Gemology of Queen Conch "Pearls"
Emmanuel Fritsch and Elise B. Misiorowski
The Seven Types of Yellow Sapphire and Their Stability to Light
Kurt Nassau and G. Kay Valente
1987 Annual Index
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