EDITORIAL STAFF
| Editor-in-Chief Duncan Pay | Editors, Micro-World | Editor-in-Chief Emeritus |
| Managing Editor Stuart D. Overlin | Editors, Gem News | Senior Technical Editor |
| Editor Brooke Goedert | Editors, Colored Stones Unearthed | Technical Editor |
| Associate Editor Erica Zaidman | Editor, Diamond Reflections | Associate Technical Editor |
| Editors, Lab Notes Thomas M. Moses Shane F. McClure | Contributing Editors | Assistant Editor |
| Customer Service (760) 603-4200 gandg@gia.e |
PRODUCTION STAFF
| Creative Director Faizah Bhatti | Photo/Video Producer | Multimedia Associate |
| Production and Multimedia Specialist Michael Creighton | Photographer | Video Production |
EDITORIAL REVIEW BOARD
| Ahmadjan Abduriyim Tokyo, Japan | Richard W. Hughes | Benjamin Rondeau |
| Timothy Adams San Diego, California | Jaroslav Hyršl | George R. Rossman |
| Edward W. Boehm Chattanooga, Tennessee | Dorrit Jacob | Sudarat Saeseaw |
| James E. Butler Washington, DC | A.J.A. (Bram) Janse | Karl Schmetzer |
| Alan T. Collins London, UK | Mary L. Johnson | Andy Shen |
| Sally Eaton-Magaña Carlsbad, California | Robert E. Kane | Guanghai Shi |
| John L. Emmett Brush Prairie, Washington | Stefanos Karampelas | James E. Shigley |
| Emmanuel Fritsch Nantes, France | Lore Kiefert | Elisabeth Strack |
| Eloïse Gaillou Paris, France | Simon Lawson | Nicholas Sturman |
| Al Gilbertson Carlsbad, California | Ren Lu | D. Brian Thompson |
| Gaston Giuliani Nancy, France | Thomas M. Moses | Fanus Viljoen |
| Lee A. Groat Vancouver, Canada | Laura Otter | Wuyi Wang |
| Yunbin Guan Pasadena, California | Aaron C. Palke | Christopher M. Welbourn |
| George Harlow New York, New York | Ilene Reinitz | Chunhui Zhou |
| Peter Heaney University Park, Pennsylvania | Nathan Renfro | J.C. (Hanco) Zwaan |
ABOUT THE COVER
Designed by Zoltan David, this opal and green tourmaline necklace contains Knightsteel links with 99.42 total carats of Ethiopian opal beads. The 10.97 ct tourmaline from Afghanistan, faceted by Clay Zava, is set in a bezel with platinum inlay and 0.22 carats of diamonds. The necklace was one of many stunning pieces David exhibited at the 2023 Tucson shows, which are reported on in this issue. Photo by Robert Weldon; courtesy of Zoltan David.
Printing is by L+L Printers, Carlsbad, CA.
GIA World Headquarters
The Robert Mouawad Campus
5345 Armada Drive
Carlsbad, CA 92008 USA
© 2023 Gemological Institute of America
All rights reserved.
ISSN 0016-626X
SUBSCRIPTIONS
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 renewals, group subscriptions, GIA alumni, and current GIA students. To purchase print subscriptions, visit store.gia.edu or contact gandg@gia.edu. For institutional rates, contact Customer Service.
DATABASE COVERAGE
Gems & Gemology’s impact factor is 2.045, according to the 2021 Journal Citation Reports by Clarivate Analytics (issued June 2022). G&G 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) | 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 |
| Book Review Digest Plus | GeoRef | British Library Document Supply Centre (BLDSC) |
| TOC Premier (Table of Contents) | Chemical Abstracts | 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 |
MANUSCRIPT SUBMISSIONS
Gems & Gemology, a peer-reviewed journal, welcomes the submission of articles on all aspects of the field. Please see the Author Guidelines at www.gia.edu/gems-gemology-author-guidelines or contact the Managing Editor. Letters on articles published in G&G are also welcome. Please note that Field Reports, Lab Notes, Gem News International, Micro-World, Colored Stones Unearthed, Diamond Reflections, and Charts 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. copyright law for private use of patrons. Instructors are permitted to reproduce isolated articles and photographs/images owned by G&G for noncommercial classroom use without fee. Use of photographs/images under copyright by external parties is prohibited without the express permission of the photographer or owner of the image, as listed in the credits. 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.
EDITORIAL STAFF
| Editor-in-Chief Duncan Pay | Editors, Micro-World | Editor-in-Chief Emeritus |
| Managing Editor Stuart D. Overlin | Editors, Gem News | Senior Technical Editor |
| Editor Brooke Goedert | Editors, Colored Stones Unearthed | Technical Editor |
| Associate Editor Erica Zaidman | Editor, Diamond Reflections | Associate Technical Editor |
| Editors, Lab Notes Thomas M. Moses Shane F. McClure | Contributing Editors | Assistant Editor |
| Customer Service (760) 603-4200 gandg@gia.e |
PRODUCTION STAFF
| Creative Director Faizah Bhatti | Photo/Video Producer | Multimedia Associate |
| Production and Multimedia Specialist Michael Creighton | Photographer | Video Production |
EDITORIAL REVIEW BOARD
| Ahmadjan Abduriyim Tokyo, Japan | Richard W. Hughes | Benjamin Rondeau |
| Timothy Adams San Diego, California | Jaroslav Hyršl | George R. Rossman |
| Edward W. Boehm Chattanooga, Tennessee | Dorrit Jacob | Sudarat Saeseaw |
| James E. Butler Washington, DC | A.J.A. (Bram) Janse | Karl Schmetzer |
| Alan T. Collins London, UK | Mary L. Johnson | Andy Shen |
| Sally Eaton-Magaña Carlsbad, California | Robert E. Kane | Guanghai Shi |
| John L. Emmett Brush Prairie, Washington | Stefanos Karampelas | James E. Shigley |
| Emmanuel Fritsch Nantes, France | Lore Kiefert | Elisabeth Strack |
| Eloïse Gaillou Paris, France | Simon Lawson | Nicholas Sturman |
| Al Gilbertson Carlsbad, California | Ren Lu | D. Brian Thompson |
| Gaston Giuliani Nancy, France | Thomas M. Moses | Fanus Viljoen |
| Lee A. Groat Vancouver, Canada | Laura Otter | Wuyi Wang |
| Yunbin Guan Pasadena, California | Aaron C. Palke | Christopher M. Welbourn |
| George Harlow New York, New York | Ilene Reinitz | Chunhui Zhou |
| Peter Heaney University Park, Pennsylvania | Nathan Renfro | J.C. (Hanco) Zwaan |
ABOUT THE COVER
Designed by Zoltan David, this opal and green tourmaline necklace contains Knightsteel links with 99.42 total carats of Ethiopian opal beads. The 10.97 ct tourmaline from Afghanistan, faceted by Clay Zava, is set in a bezel with platinum inlay and 0.22 carats of diamonds. The necklace was one of many stunning pieces David exhibited at the 2023 Tucson shows, which are reported on in this issue. Photo by Robert Weldon; courtesy of Zoltan David.
Printing is by L+L Printers, Carlsbad, CA.
GIA World Headquarters
The Robert Mouawad Campus
5345 Armada Drive
Carlsbad, CA 92008 USA
© 2023 Gemological Institute of America
All rights reserved.
ISSN 0016-626X
SUBSCRIPTIONS
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 renewals, group subscriptions, GIA alumni, and current GIA students. To purchase print subscriptions, visit store.gia.edu or contact gandg@gia.edu. For institutional rates, contact Customer Service.
DATABASE COVERAGE
Gems & Gemology’s impact factor is 2.045, according to the 2021 Journal Citation Reports by Clarivate Analytics (issued June 2022). G&G 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) | 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 |
| Book Review Digest Plus | GeoRef | British Library Document Supply Centre (BLDSC) |
| TOC Premier (Table of Contents) | Chemical Abstracts | 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 |
MANUSCRIPT SUBMISSIONS
Gems & Gemology, a peer-reviewed journal, welcomes the submission of articles on all aspects of the field. Please see the Author Guidelines at www.gia.edu/gems-gemology-author-guidelines or contact the Managing Editor. Letters on articles published in G&G are also welcome. Please note that Field Reports, Lab Notes, Gem News International, Micro-World, Colored Stones Unearthed, Diamond Reflections, and Charts 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. copyright law for private use of patrons. Instructors are permitted to reproduce isolated articles and photographs/images owned by G&G for noncommercial classroom use without fee. Use of photographs/images under copyright by external parties is prohibited without the express permission of the photographer or owner of the image, as listed in the credits. 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.