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The Journal of Gemmology — 2014 / Volume 34 / No GemmologyThe Journal of 2014 / Volume 34 / No. 2 The Journal of Gemmology — 2014 / Volume 34 / No. 2 pp. 91–184 / Volume — 2014 The Gemmological Association of Great Britain Gem-A Conference 2014 ...Book now to reserve your place SATURDAY 1 AND SUNDAY 2 NOVEMBER Business Design Centre, Islington, London Gem-A will bring together a range of globally-renowned speakers and international delegates to discuss a variety of important issues within the gem and jewellery trade, from both a scientific and trade perspective. The Saturday Conference will be followed by a dinner open to all delegates. Guest speakers include: Edward Boehm GG CG Brian Cook Richard Hughes FGA Bruce Bridges Dr Thomas Hainschwang FGA Craig Lynch GG Dr Laurent Cartier FGA Alan Hart FGA DGA Dr Menahem Sevdermish FGA Terry Coldham FGAA Dr Ulrich Henn Chris Smith FGA MONDAY 3 NOVEMBER Seminars Gem-A Headquarters, 21 Ely Place, London EC1N 6TD Do you invest in your people? Guest seminar hosts: Richard Drucker FGA GG, President of GemWorld International Inc. Mikko Åström FGA and Alberto Scarani GG, GemmoRaman We know that great employees make great businesses. Enhance the skills of your staff and invest in your business with our world-famous Gemmology and Diamond MONDAY 3 NOVEMBER (EVENING) Diplomas. Graduates of our Diplomas can apply for Membership, entitling them to Graduation Ceremony and Presentation of Awards use the prestigious FGA and DGA post-nominal letters — marks of excellence in the Goldsmiths’ Hall, London trade. Guest speaker: Tim Matthews FGA DGA, CEO of Jewelry Television (JTV) With a range of flexible study methods, enabling your staff to fit their study around their work schedule, there has never been a better time to enrol in our courses. TUESDAY 4 NOVEMBER Private visit to the mineral collection at the Natural History Museum You can also raise your profile with Corporate Membership and Gold Corporate Hosted by Alan Hart FGA DGA, Head of Collections and Mineralogy Collections Membership, allowing you to display our recognized Coat of Arms to show your Global ethical challenges within the industry commitment to knowledgable and fair trading. Corporate Membership also includes Gem-A Headquarters two Individual Membership subscriptions, giving you access to a host of services Seminar with Greg Valerio and Vivien Johnston and keeping you up-to-date with the latest trade news and research. For a full programme of events and a booking form visit www.gem-a.com Major sponsor Sponsor Supporters Associate Supporters To sign up visit our website at www.gem-a.com, or contact [email protected]. Image (top) courtesy of Business Design Centre. ™ ™ The Gemmological Association of Great Britain, 21 Ely Place, London, EC1N 6TD, UK. T: +44 (0) 20 7404 3334 F: +44 (0) 20 7404 8843. Registered charity BOOKING NOW OPEN no. 1109555. A company limited by guarantee and registered in England No. 1945780. Registered Office: 3rd Floor, 1-4 Argyll Street, London W1F 7LD. Contact [email protected] Conference Ad_07-2014-July_JoG.indd 1 14/07/2014 15:13:02 General Education Ad_07-2014-July_JoG.indd 1 15/07/2014 12:35:43 Contents GemmologyThe Journal of 2014 / Volume 34 / No. 2 COLUMNS p. 105 91 What’s New p. 109 GIA DiamondCheck | HRD Alpha Diamond Analyzer | Sarine Loupe | CIBJO Congress reports | Gem laboratory newsletters | The Handbook of Gemmology | Responsible Jewellery Council reports | Help with Hallmarks app 94 Practical Gemmology Spinel masquerading as ARTICLES taaffeite or sapphirine Feature Articles 96 Gem Notes 114 Evolution of Diamond Cuts in Portuguese Jewellery Andradite from Arizona, USA | Bobdownsite | Orange and Sacred Objects During the 16th–18th Centuries: lizardite | Large quartz from A Brief Review Arkansas, USA | Gold-included By Rui Galopim de Carvalho quartz crystal | Tucson gem show rarities | Pastel green 130 Beryllium-Diffused Corundum in the Japanese sapphire | Sapphire with Market, and Assessing the Natural vs. Diffused large spessartine inclusion | Origin of Beryllium in Sapphire Tourmaline from the Cruzeiro By Kentaro Emori, Hiroshi Kitawaki and Makoto Okano Mine, Brazil | Natural diamond showing a ‘synthetic’ pattern Gemmological Briefs in the DiamondView | Beryl 138 A Rare 100+ ct Jeremejevite triplets imitating emerald | Glass imitation of tanzanite By Christopher P. Smith | Synthetic ruby doublet | 144 Some Characteristics of Taaffeite from Myanmar Corundum with coloured lead- By Thanong Leelawatanasuk, Wilawan Atichat, Tay Thye Sun, glass fillings | Dyed labradorite Boontawee Sriprasert and Jirapit Jakkawanvibul 150 Natural Pearls from Edible ‘True Oysters’ in Zeeland, The Netherlands Cover Photo: By J.C. (Hanco) Zwaan and Peter Groenenboom These two historic Por- tuguese jewels feature different diamond cut- 156 Conferences ting styles: the gold stomacher (15.7 × 6.5 Sinkankas Symposium | Scottish Gemmological Association and × 3.0 cm) from the late Swiss Gemmological Society Conferences | AGA Las Vegas 17th to early 18th cen- tury is set with rose cuts, Conference and the gold and silver ring (2.8 × 1.7 × 1.2 cm) 162 from the late 18th centu- Gem-A Notices ry is set with brilliant-cut diamonds. For more on 170 Learning Opportunities historic diamond cutting styles in Portugal, see the article by R. Galopim de Carvalho on pp. 114–128. Photos by Carlos Pom- 174 New Media bo Monteiro; © Fundação Eugénio de Almeida / Arquidiocese de Évora, Portugal; composite image by Orasa Weldon. 182 Literature of Interest ISSN: 1355-4565 i The Journal of Gemmology Editor-in-Chief Production Editor Marketing Consultant Brendan M. Laurs Mary A. Burland Ya’akov Almor [email protected] [email protected] [email protected] 21 Ely Place London EC1N 6TD Executive Editor Editor Emeritus Assistant Editor UK James H. Riley Roger R. Harding Michael J. O’Donoghue t: +44 (0)20 7404 3334 Associate Editors f: +44 (0)20 7404 8843 Edward Boehm, RareSource, Chattanooga, Tennessee, USA; Alan T. Collins, King’s College e: [email protected] London; John L. Emmett, Crystal Chemistry, Brush Prairie, Washington, USA; Emmanuel w: www.gem-a.com Fritsch, University of Nantes, France; Rui Galopim de Carvalho, Portugal Gemas, Lisbon, Registered Charity No. 1109555 Portugal; Lee A. Groat, University of British Columbia, Vancouver, Canada; Thomas Registered office: Palladium House, Hainschwang, GGTL Gemlab–Gemtechlab Laboratory, Balzers, Liechtenstein; Henry A. 1–4 Argyll Street, London W1F 7LD Hänni, GemExpert, Basel, Switzerland; Jeff W. Harris, University of Glasgow; Alan D. Hart, The Natural History Museum, London; Ulrich Henn, German Gemmological Association, Idar-Oberstein; Jaroslav Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland, Edinburgh; Stefanos Karampelas, Gübelin Gem Lab Ltd., Lucerne, Switzerland; Lore Kiefert, Gübelin Gem Lab Ltd., Lucerne, Switzerland; Hiroshi Kitawaki, Central Gem Laboratory, Tokyo, Japan; Michael S. Krzemnicki, Swiss Gemmological Institute SSEF, President Basel; Shane F. McClure, Gemological Institute of America, Carlsbad, California; Jack Harry Levy M. Ogden, Striptwist Ltd., London; Federico Pezzotta, Natural History Museum of Milan, Vice Presidents Italy; Jeffrey E. Post, Smithsonian Institution, Washington DC, USA; Andrew H. Rankin, David J. Callaghan, Alan T. Collins, Kingston University, Surrey; George R. Rossman, California Institute of Technology, Noel W. Deeks, E. Alan Jobbins, Pasadena, USA; Karl Schmetzer, Petershausen, Germany; Dietmar Schwarz, AIGS Lab Co. Michael J. O’Donoghue, Ltd., Bangkok, Thailand; Menahem Sevdermish, GemeWizard Ltd., Ramat Gan, Israel; Andrew H. Rankin Guanghai Shi, China University of Geosciences, Beijing; James E. Shigley, Gemological Institute of America, Carlsbad, California; Christopher P. Smith, American Gemological Honorary Fellow Laboratories Inc., New York; Evelyne Stern, London; Elisabeth Strack, Gemmologisches Emmanuel Fritsch Institut, Hamburg, Germany; Tay Thye Sun, Far East Gemological Laboratory, Singapore; Pornsawat Wathanakul, Gem and Jewelry Institute of Thailand, Bangkok; Chris M. Honorary Diamond Member Welbourn, Reading, Berkshire; Joanna Whalley, Victoria and Albert Museum, London; Martin Rapaport Bert Willems, Gilching, Germany; Bear Williams, Stone Group Laboratories LLC, Jefferson City, Missouri, USA; J.C. (Hanco) Zwaan, National Museum of Natural History ‘Naturalis’, Honorary Life Members Leiden, The Netherlands. Anthony J. Allnutt, Hermann Bank, Terence M.J. Davidson, Peter R. Content Submission Dwyer-Hickey, Gwyn M. Green, The Editor-in-Chief is glad to consider original articles, news items, conference/excursion Roger R. Harding, John S. Harris, reports, announcements and calendar entries on subjects of gemmological interest for J. Alan W. Hodgkinson, John I. publication in The Journal of Gemmology. A guide to the preparation of manuscripts Koivula, C.M. (Mimi) Ou Yang, is given at www.gem-a.com/publications/journal-of-gemmology.aspx, or contact the Evelyne Stern, Ian Thomson, Vivian P. Production Editor. Watson, Colin H. Winter Subscriptions Chief Executive Officer Gem-A members receive The Journal as part of their membership package, full details of James H. Riley which are given at www.gem-a.com/membership.aspx. Laboratories, libraries, museums and similar institutions may become Direct Subscribers to The Journal (see www.gem-a. Council com/publications/subscribe.aspx). Jason F. Williams – Chairman Mary A. Burland, Steven J.C. Collins, Advertising Paul F. Greer, Nigel B. Israel, Jonathan Enquiries about advertising in The Journal should
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