Celebrating 75 Years of Gems & Gemology
Stuart Overlin and Dona M. Dirlam
The ìType" Classification System of Diamonds and Its Importance in Gemology
Christopher M. Breeding and James E. Shigley
Spectral Differentiation Between Copper and Iron Colorants in Gem Tourmalines
Paul B. Merkel and Christopher M. Breeding
Gem-Quality Andalusite from Brazil
Shyamala Fernandes and Gagan Choudhary
Characterization of Peridot from Sardinia, Italy
Ilaria Adamo, Rosangela Bocchio, Alessandro Pavese, and Loredana Prosperi
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.