Gems & Gemology Summer 2017, Vol. 53, No. 2

Summer 2017 G&G Publication Information

Editorial Staff

Duncan Pay
Editors, Lab Notes 
Thomas M. Moses
Shane F. McClure
Contributing Editors 
James E. Shigley
Andy Lucas
Donna Beaton
Managing Editor 
Stuart D. Overlin
Editors, Micro-World 
Nathan Renfro
Elise A. Skalwold
John I. Koivula
Editor-in-Chief Emeritus
Alice S. Keller
Jennifer-Lynn Archuleta
Editors, Gem News 
Emmanuel Fritsch
Gagan Choudhary
Christopher M. Breeding
Customer Service
Martha Erickson
1(760) 603-4502
Technical Editors
Tao Hsu
Jennifer Stone-Sundberg
Editorial Assistants
Brooke Goedert
Erin Hogarth

Production Staff

Creative Director
Faizah Bhatti
Robert Weldon
Production Specialist
Juan Zanuharia
Image Specialist
Kevin Schumacher
Multimedia Specialist
Lynn Nguyen
Video Production
Pedro Padua
Nancy Powers
Betsy Winans

Editorial Review Board

Ahmadjan Abduriyim
Tokyo, Japan
A. J. A. (Bram) Janse
Perth, Australia
Nathan Renfro
Carlsbad, California
Timothy Adams
San Diego, California
E. Alan Jobbins
Caterham, UK
Benjamin Rondeau
Nantes, France
Edward W. Boehm
Chattanooga, Tennessee
Mary L. Johnson
San Diego, California
George R. Rossman
Pasadena, California
James E. Butler
Washington, DC
Anthony R. Kampf
Los Angeles, California
Andy Shen
Wuhan, China
Alan T. Collins
London, UK
Robert E. Kane
Helena, Montana
Guanghai Shi
Beijing, China
John L. Emmett
Brush Prairie, Washington
Stefanos Karampelas
Basel, Switzerland
James E. Shigley
Carlsbad, California
Emmanuel Fritsch
Nantes, France
Lore Kiefert
Lucerne, Switzerland
Elisabeth Strack
Hamburg, Germany
Eloïse Gaillou
Paris, France
Ren Lu
Wuhan, China
Fanus Viljoen
Johannesburg, South Africa
Gaston Giuliani
Nancy, France
Thomas M. Moses
New York, New York
Wuyi Wang
New York, New York
Jaroslav Hyršl
Prague, Czech Republic
Aaron Palke
Brisbane, Australia
Christopher M. Welbourn
Reading, UK


Copies of the current issue may be purchased for $29.95 plus shipping. Subscriptions are $79.99 for one year (4 issues) in the U.S. and $99.99 elsewhere. Canadian subscribers should add GST. Discounts are available for group subscriptions, GIA alumni, and current GIA students. To purchase print subscriptions, visit or contact Customer Service. For institutional rates, contact Customer Service.

To purchase subscriptions visit the GIA store or contact Customer Service.

Database Coverage

Gems & Gemology is abstracted in Thomson Reuters prod­ucts (Current Contents: Physical, Chemical & Earth Sci­ences and Science Citation Index-Expanded, including the Web of Knowledge) and other databases:

Academic Search Complete (EBSCO) Current Abstracts ProQuest/Cambridge Scientific Abstracts/CSA Illumina
AESIS (Australian Earth Sciences Information System) Current Contents Referativnyi Zhurnal
Applied Science & Technology Full Text/Abstracts/Index GeoArchive Russian Academy of Sciences Bibliographies
Biography Index GEOBASE Scopus/SciVerse (Elsevier)
Book Review Digest Plus GeoRef Speleological Abstracts
British Library Document Supply Centre (BLDSC) Linda Hall Library of Science, Engineering, and Technology TOC Premier (Table of Contents)
Chemical Abstracts ingenta Web of Science
CISTI (Canada Institute for
Scientific and Technical Information)
Mineralogical Abstracts Wilson Omni File: Full Text Mega Edition
Computers & Applied Sciences Complete PASCAL (INIST) Wilson Omni File: Full Text Select

Author Guidelines

Gems & Gemology, a peer-reviewed journal, welcomes the submission of articles on all aspects of the field. Please see the Guidelines for Authors at or contact the Managing Editor. Letters on articles published in G&G are also welcome. Please note that Field Reports, Lab Notes, and Gem News International entries are not peer-reviewed sections, but do undergo technical and editorial review.

Copyright and Reprint Permission

Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limits of U.S. copy­ right law for private use of patrons. Instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. Copying of the photographs by any means other than traditional photocopying techniques (Xerox, etc.) is prohibited without the express permission of the photog­rapher (where listed) or author of the article in which the photo appears (where no photographer is listed). For other copying, reprint, or republication permission, please contact the Managing Editor.

Gems & Gemology is published quarterly by the Gemologi­cal Institute of America, a nonprofit educational organization for the gem and jewelry industry.

Any opinions expressed in signed articles are understood to be opinions of the authors and not of the publisher.