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

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).

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SKU: 09su