Supporting the Researchers of Tomorrow
By 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.

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Articles (4)


Observations on Pearls Reportedly from the Pinnidae Family (Pen Pearls)

By Nicholas Sturman, Artitaya Homkrajae, Areeya Manustrong, and Nanthaporn Somsa-ard , Oct 31

Examines the internal structure, chemical composition, and spectroscopic features of 22 pen pearls.

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Optical Properties
Optical Properties

Pleochroism in Faceted Gems: An Introduction

By Richard W. Hughes , Oct 31

Describes the phenomenon of pleochroism and its complex effect on the appearance of colored stones.

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Nephrite Jade from Guangxi Province, China

By Zuowei Yin, Cui Jiang, M. Santosh, Yiming Chen, Yi Bao, and Quanli Chen , Oct 31

Introduces the Chinese nephrite mine in Hechi and characterizes the “band” and dendritic patterns found in this material.

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Regular Features

Lab notes
Lab Notes

The latest advances and findings from GIA laboratories.

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Gem News
Gem News International

Global coverage of gem sources, notable new gem materials, and recent industry developments.

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Book Review
Book Reviews

Your guide to the latest gem and jewelry books and other media.

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Gemological Abstracts

Summaries of important gem and jewelry articles recently published elsewhere.

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Congratulations to the readers who earned a perfect score on this year's Challenge quiz.

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