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  • Cover of Gems & Gemology Summer 1991 issue, featuring round green gems encased by golden gem strands

Summer 1991

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

Fracture Filling of Emeralds: Opticon and Traditional "Oils"
Robert C. Kammerling, John I. Koivula, Robert E. Kane, Patricia Maddison, James E. Shigley, and Emmanuel Fritsch

Emeralds from the Ural Mountains, USSR
Karl Schmetzer, Heinz-J¸rgen Bernhardt, and Rudolf Biehler

Treated Andamooka Matrix Opal
Grahame Brown

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.

SKU: 91su