Dedication and Acknowledgments i
Contents 1
Speaker and Author Biographies 2
Evan Caplan 6
Alexandrite, Pricing Factors, and the Future Market
William Larson 10
Collecting Color-Change Minerals and Gemstones from World Localities
Ciğdem Lüle 14
Diaspore from Turkey
Sally Eaton-Magaña 18
Color-Change Phenomena in Diamond
Niveet Nagpal 28
Designing with Color-Change Gemstones
Aaron Palke and George R. Rossman 32
Causes of Color in Color-Change Gemstones
Nathan Renfro 40
The
Stuart Robertson 42
Price Trends of Alexandrite and Other Color-Change Gemstones
Wim Vertriest 48
Overview of the Geology and Mining of Alexandrite
Robert Weldon 52
Gem Photography’s Biggest Challenge: Color-Change Gemstones
Ziyin Sun, Aaron C. Palke, Jonathan Muyal, Dino DeGhionno, and Shane F. McClure 60
Geographic Origin Determination of Alexandrite (from the Winter 2019 Gems & Gemology)
Karl Schmetzer 76
Pleochroism and Color Change in Faceted Alexandrite: Influence of Cut and Sample Orientation (from the Spring 2019 Gems & Gemology
