• Winter 1987

Winter 1987

  • $15.00
The PDF version of this issue is available at no charge. Visit
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

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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