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Dyed Purple Hydrophane Opal
Nathan Renfro and Shane F. McClure
Determining Garnet Composition from Magnetic Susceptibility And Other Properties
Donald B. Hoover
GIA's Symmetry Grading Boundaries for Round Brilliant Cut Diamonds
Ron H. Geurts, Ilene M. Reinitz, Troy Blodgett, and Al M. Gilbertson
A Historic Turquoise Jewelry Set Containing Fossilized Dentine (Odontolite) and Glass
Michael S. Krzemnicki, Franz Herzog, and Wei Zhou
The Radioactive Decay Pattern of Blue Topaz Treated by Neutron Irradiation
Jian Zhang, Taijin Lu, Manjun Wang, and Hua Chen
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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