The quarterly journal of the gemological institute of america
EDITORIAL
Supporting the Researchers of Tomorrow
Duncan Pay, Editor-in-Chief
An overview of the Fall 2014 issue of Gems & Gemology, as well as GIA’s efforts to promote gemological research.
Articles (4)
Pleochroism in Faceted Gems: An Introduction
Describes the phenomenon of pleochroism and its complex effect on the appearance of colored stones.
Sri Lanka: Expedition to the Island of Jewels
Offers a firsthand look at Sri Lanka’s mining, cutting, jewelry manufacturing, and retail sectors, where tradition and innovation converge.
Nephrite Jade from Guangxi Province, China
Introduces the Chinese nephrite mine in Hechi and characterizes the “band” and dendritic patterns found in this material.
Observations on Pearls Reportedly from the Pinnidae Family (Pen Pearls)
Examines the internal structure, chemical composition, and spectroscopic features of 22 pen pearls.
Regular Features
GEMS NEWS INTERNATIONAL
Global coverage of gem sources, notable new gem materials, and recent industry developments.
GEMOLOGICAL ABSTRACTS
Summaries of important gem and jewelry articles recently published elsewhere.
THE DR. EDWARD J. GÜBELIN
Most Valuable Article Awards
Recent Advances in Understanding the Geology of Diamonds
Steven B. Shirey and James E. Shigley
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