Dietmar Schwarz, Eckehard J. Petsch, and Jan Kanis
Russian Demantoid, Czar of the Garnet Family
Wm. Revell Phillips and Anatoly S. Talantsev
Opal from Shewa Province, Ethiopia
Mary L. Johnson, Robert C. Kammerling, Dino G. DeGhionno, and John I. Koivula
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 student and alumni save 10% on back issues! Enter coupon code GGALUM and a GIA Student Number at checkout.