Summer 2011

RESEARCH TRACK: Colored Stone and Pearl Identification

Geographic Origin Determination of Colored Gemstones
Ahmadjan Abduriyim

Australian Opal Nomenclature and Assessment
Roy A. Beattie, Kevin N. Blackman, and Helen Levonis

An LA-ICP-MS Study of Lavender Jadeite from Myanmar, Guatemala, and Japan
George E. Harlow and Guanghai Shi

Spectral Differentiation of Natural-Color Saltwater Cultured Pearls from 
Pinctada Margaritifera and Pteria Sterna
Stefanos Karampelas, Emmanuel Fritsch, Thomas Hainschwang, and Jean-Pierre Gauthier

Pearl Identification—A Practitioner’s Perspective
Kenneth Scarratt

Natural-Color Tanzanite    
Christopher P. Smith
(erratum)

Experimental Treatments Involving Dye and Heat for Chinese Freshwater Cultured Pearls, and Their Detection with Raman Spectroscopy
Elisabeth Strack and Michael S. Krzemnicki

Durability and Safety Testing of Lead Glass–Treated Ruby and Beryllium-Treated Sapphire, and Environmental Impact Assessments
Chakkaphan Sutthirat

Archaeogemology of Peridot
Lisbet Thoresen and James A. Harrell

Research and Identification of Natural and Treated Nephrite in China
Beili Zhang, Taijin Lu, Hua Chen, and Jie Ke

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