• Cover of Gems & Gemology Spring 1999 issue, featuring pale blue stone carved as jewelry and sculpture

Spring 1999

  • $15.00

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

The Identification of Zachery-Treated Turquoise
Emmanuel Fritsch, Shane F. McClure, Mikhail Ostrooumov, Yves Andres, Thomas Moses, John I. Koivula, and Robert C. Kammerling

Some Diagnostic Features of Russian Hydrothermal Synthetic Rubies and Sapphires
Karl Schmetzer and Adolf Peretti

The Separation of Natural from Synthetic Colorless Sapphire
Shane Elen and Emmanuel Fritsch

Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).

GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout.

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SKU: 439902