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Table of Contents

Spring 2006, Volume 42, Issue 1

EDITORIAL

Symposium 2006: Join Us as We Navigate the Challenges Ahead p.1
Alice S. Keller
The Dr. Edward J. Gübelin Most Valuable Article Award p.2-p.3

FEATURE ARTICLES

Paraíba-type Copper-bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting by LA-ICP-MS p.4-p.21
Ahmadjan Abduriyim, Hiroshi Kitawaki, Masashi Furuya, and Dietmar Schwarz
Identification and Durability of Lead Glass-Filled Rubies p.22-p.34
Shane F. McClure, Christopher P. Smith, Wuyi Wang, and Matthew Hall
The Characterization of Tortoise Shell and Its Imitations p.36-p.52
Thomas Hainschwang and Laurence Leggio

REGULAR FEATURES

Lab Notes p.54-p.61
Featured Lab Note: Color-Coated Star Quartz p.60-p.61
Gem News International p.62-p.80
Featured Gem News International: A Rutilated Quartz Doublet p.76-p.77
2006 Gems & Gemology Challenge p.81-p.82
Book Reviews p.83-p.84
Gemological Abstracts p.85-p.93