The PDF version of this issue is available at no charge. Visit www.gia.edu
Quantitative Colorimetric Analysis
Ziyin Sun, Aaron C. Palke, and Nathan Renfro
The Origin of Montanaís Alluvial Sapphires
J.C. (Hanco) Zwaan, Eric Buter, Regina Mertz-Kraus, and Robert E. Kane
The Grand Sapphire of Louis XIV and the Ruspoli Sapphire
Franaois Farges, Gerard Panczer, Nassima Benbalagh, and Geoffray Riondet
Characterization of Tarnish Spots in Chinese High-Purity Gold Jewelry
Taijin Lu, Jian Zhang, Yan Lan, Ying Ma, Hua Chen, Jie Ke, Zhenglong Wu, and Miaomiao Tang
Splendor in the Outback: A Visit to Australia's Opal Fields
Tao Hsu, Andrew Lucas, and Vincent Pardieu
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.
Usually ships in 3-5 business days.