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| ARTICLES 64 Kashmir Sapphire David Atkinson and Rustam Z. Kothavala 77 The GEM DiamondMaster and the Thermal...Queretaro, Mexico: Occurrence and Inclusions John I. Koiv~da,Chuck Fryer, and Peter C . Keller NOTES A N...Stockton and D. Vincent Manson Investigation of a Cat's-Eye Scapolite from Sri Lanka K. Schmetzer and H. Bank...the fine carvings and other gem materials o n display at the recently expanded and remodeled Deutsches...Gerhard Becker, Idar-Oberstein. Photo " 1983 Harold and Erica V a n Pelt-Photographers, Los Angeles. Composition |
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| LXXVI.VI 625 RECORDS OF THE GEOLOGICAL SURVEY OF INDIA °l II VOLUME LXXVI A* BULLET1NS OF ECONOMIC MINERALS... IYER Published by order of the Government of India 1942 CALCUTTA: Sold at the Central Book Depot,... add at the Office of the Geological Survey of India, 27, Ghowefkchee Road. DELHI: Sold at the Office...GEOLOGICAL SURVEY OF INDIA. RECORDS. Records of the Geological Surrey of India : These brochures were...were first issued in 1868 and hare continued to be utilised for the publication of professional papers on |
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| McClure, and Joachim M e i ~ z h a u s e n Diagnostic Features and Heat Treatment of Kashmir Sapphires Rolf...Rolf Schwieger NOTES; AND NEW TECHNIQUES 282 An Investigation of a Suite of Black Diamond Jewelry Robert...C. Kammerling, Robert E. Kane, John I. Koivula, and Shone P. McClure "Emeraldolite": A New Synthetic...Beryl Dominiifiie Robert, E m m a n u e l Fritsch, and John I. Koivula REGULAR FEATURES 294 Gem Trade...approximately 41 ct, it is also one of the largest, and, to some, the finest, natural-color green diamonds |
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| CLASSIC MINERAL LOCALITIES OF THE WORLD Asia and Australia = _ |) VieBAtO TATA JARS LIPOW Si....“ CLASSIC MINERAL LOCALITIES OF THE WORLD Asia and Australia Philip Scalisi David Cook VAN NOSTRAND...photocoyping, recording, taping, or information storage and retrieval systems—without permission of the publisher...Asia and Australia. Bibliography: p. Includes index. 1. Mines and mineral resources—Asia. 2. Mines and...and mineral resources—Australia. 3. Mines and mineral resources—Soviet Union. II. Title. TN99.S28 553° |
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| THE GEOLOGIC AND GEOGRAPHIC OF PRECIOUS S¾•¾ OCCURRENCE STONES? H. B^ix.. "In themountains of...roughproductat the mine. No great accuracyis claimedfor them,and in the caseof someof the minor preciousstones,they...are rocksrather than minerals,and the fossil substances amber, jet and bone turquoise. RELATIVE PRODUCTION...thetotal,thediamond accountsfor 94.3 per cent.;and sapphire,amber,emerald,ruby, jadeite,turquoiseand opaltogetheranother4................................................ Sapphire ............................................. |
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| January, 1966 Vol. 10 No.1 THE JOURNAL OF GEMMOLOGY and PROCEEDINGS OF THE GEMMOLOGICAL ASSOCIATION OF... Herbert Stnith, C.B.E., M.A., D.S.., OFFICERS AND COUNCIL Prest dent : Sir Lawrence Bragg, F.R.S. Vice-Presidents:... F.G.A. Librarian: H. Wheeler, F.G.A. Secretary and Director of Examinations : G. F. Andrews Offices:...Canadian Genunologieal Association Rhodesian GelU and Mineral Society THE JOURNAL OF GEMMOLOGY A N D...Geological Survey of India ABSTRACT D IFFERENT types of inclusions in sapphires from Kashmir and aquamarines |
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| Charts and More Available Through the GIA Store Visit our website to order. It’s quick, easy and secure...Moses, and James E. Shigley An overview of the geographic origin complexities facing the gem and jewelry...464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee A. Groat Over the last...state of our knowledge of the geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review...Jennifer Stone-Sundberg, Ziyin Sun, Nathan D. Renfro, and Aaron C. Palke Geographic origin determination relies |
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| 2022 Spinel from Tajikistan Cleopatra’s Emerald Mines DaylightFluorescent Hyalite from Namibia Gahnite...Colore Abstracts | Dubai Diamond Conference Summary and Highlights | Gemmological Society of Japan 2021 Annual...Annual Meeting Abstracts | The Gemstones and Jewellery Community Platform Reports | Lab-Grown Diamond...Pamir Mountains of Tajikistan, has a long history and has been set into some important jewellery pieces...old-cut cushion diamonds (1.30 ct total weight) and 272 pavé diamonds. Courtesy of IVY New York. ARTICLES |
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| - by richard w. hughes I - ,=: CJ? UBY & SAPPHIRE is a journey into one of mankind's most fascinating...But Ruby & Sapphire is just such a book-a rare combination of face and fun, the pertinent and che peculiar...peculiar. Open Ruby & Sapphire and you seep into a secret world where, with each page turned, a new adventure...where pigeon's-blood rubies are pried from both soil and central government control. Marvel over India's maharajahs...meat were cast co trap tubies. And ascend to the lofty snows of Kashmir, home of storied blue-velvet sapphires |
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| of the SSEF methods and utmost accuracy and rigor. Very often, new insights and Facette in December...promising opportunities for all of us, trade members and Whether it is a deviation in observed or measured...cornerstone April, the picture is very different and challenging due to the global spread of an extensive...brought so much sorrow and pain institutions or laboratories. to vulnerable people and communities in our...– at least for us gemmologists – a further facet and colourful reflection to the apparent visual beauty |
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| photocopying, recording, taping, or information storage and retrieval systems-without written permission from...553.8-dc20 I. Title. 89-22478 CIP The author and publisher have exercised their best judgement in...the sources, and have made every reasonable effort to make the data presented accurate and authoritative...their rarity and natural beauty; gemstones have been valued as objects of personal adornment and symbols of...of wealth and status by every culture throughout history. Occurring in a remarkable variety of colors |
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| appear 389 Fig. la and lb. Synthetic red spinel, showing curved growing lines and gaseous inclusions...391 Fig. 4. Synthetic red spinel ; triangular and tadpole-shaped two-phase inclusions. 120* , 0 •...round-shaped cavities and hose-like channels. T h e long tube of Figs, l a and l b is shown again in...of the small tubes is gaseous, that is hydrogen, and the bright one liquid, that is water. Fig. 3 also...twophase inclusions, most of them in triangular forms and some almost a tadpole shape. Fig. 5 again shows these |
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| described so exactly the nature of the process involved, and even the simplest process must have a descriptive...piece of printing, paper placed underneath the dish, and the whole exposed to light from an overhead electric...curved bands of colour as pale instead of dark, and a narrow bright rim round the specimen which really...that of the surrounding liquid. * B. W. Anderson and Robert Webster. " Curved bands in synthetic spinel...preliminary experiment was sufficiently attractive and promising (though it did not reproduce well) to make |
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| exceptionally rare and fine fibrolite of 19.85 Gold box set with a large, fine citrine and other Superb...Superb tanzanite crystal and cut gemstone from carats from Burma. gemstones. Tanzania. Rare Sri Lankan...Lankan orange sapphire of 57.26 carats. Emerald crystal, associated with calcite and pyrite, on black limestone...Large spodumene crystal and cut gemstone from Brazil. Gemstones have been a source ofdelight and fascination...explores the nature of gemstones and their special attributes of beauty, rarity and durability. The mineral properties |
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| information about a summary of our recent activities and research. our options for gemmological education...numerous home office hours, have been very challenge and certainly has had a deep impact in all our personal...also in the way we all work in the jewellery trade and at gem laboratories. or successfully completed....protect your family and business in these accessible, our findings were published and announced to the...difficult times, and would like to express my heartfelt wishes, that the scientific articles and press releases |
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| July 1996 f~J J The Gemmological Association and Gem Testing Laboratory of Great Britain President...Woodward, B.5c., FGA DGA The Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville...are understood to be the views of the contributors and not necessarily of the publishers. Cover Picture... 25, 3 In this issue . . . A rarity in the gem and mineral world, euclase has sometimes fooled the unwary...to aquamarine, but its higher refractive indices and specific gravity enable one to distinguish it quite |
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| Story of Science Series Book ACKNOWLEDGEMENTS AND CREDITS The author deeply indebted to is JOSEPH...of the original manuscript. "THE STORY OF GEMS AND SEMIPRECIOUS STOxNES" has greatly benefited from...The 13 fascination of gemstones Money, Magic and Beauty—When a Ruby Is Not a Ruby—Animal, Mineral...Makers— 2,000 Million Years Making — Sedimentary and Metamorphic Rocks of Gem 29 Chapter 4. From...Ruby, sapphires and spinel The Most Valuable Jewel— And Star Sapphires Chapter Sapphire, Too— Fancy |
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| N SAPPHIRE A kingdom for this gemstone ! Associated with royalty and romance, the noble sapphire is...is one of the world’s most coveted and treasured gemstones. M I N I N G • C U T T I N G • C R E AT I O...this issue examines some of the changes in the gem and jewelry industry. (Cover Design: Cynthia Unninayar)...5 All Change 6 INDUSTRY NEWS in colored gems and jewelry 26 10 LIVING LIFE DANGEROUSLY A glimpse...INSIGHTS A series of spotlights on differentiation and diversification 26 Breaking Boundaries – Astaguru |
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| Gem-Quality Garnets Carol M. Stockton and D. Vincent Mcinson , , , NOTES , \ AND NEW TECHNIQUES 219 Amethystine...Amethystine Chalcedony James E. Shigley and John I. Koivula 224 The Pearl in the Chicken: Pearl Recipes in...in Papyrus Holmiensis K. Nassau and A. E. Hanson REGULAR FEATURES Gem Trade Lab Notes Gemological Abstracts...approximately 3-in. (7.5 c m ) combination chatelaine/watch and similarly sized brooch s h o w n here. In recent...gemologist. T h e article b y Carol M. Stockton and D. Vincent Manson i n this issue presents the results |
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| Disruptive Innovation and Customer Centricity GIA Research Track Scientific Findings and Industry Analysis...GIA® is accepting abstract submissions for oral and poster presentations through June 1. Seats are Limited...Conundrum Christopher M. Breeding, Sally Eaton-Magaña, and James E. Shigley Characterizes diamonds with exceptionally...“Rainbow” Hematite Xiayang Lin, Peter J. Heaney, and Jeffrey E. Post Analyzes the substructures that cause...Michio Suzuki, Chunhui Zhou, Promlikit Kessrapong, and Nicholas Sturman Shows how genetic material extracted |
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| George Bosshart, and William F. Larson pg. 344 A review of the decade’s new sources and most important...a wall chart and comprehensive tables of gem localities. 336 Gemstone Enhancement and Detection in...in the 1990s Shane F. McClure and Christopher P. Smith Gemologists grappled with several new, often-sophisticated...enhancements and the pressing need to identify them. 360 Synthetic Gem Materials and Simulants in the...the 1990s John I. Koivula, Maha Tannous, and Karl Schmetzer pg. 361 Analyzes an entire decade of activity |
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| - By Joel E. Arem data on every known species and variety of gemstone. Furthermore, its rich selection...luminescence, 220 the and sizes. Over mineral species are covered, and color plates illustrate more...three-year the exact color of while displaying to cut and brilliance cutting. At the same specular Resulting...avoided. The photos achieve naturalistic solidity and dimension, in many cases clearly revealing the...scattered throughout minera- logical literature, and reworked make them useful for gemologists. to Of |
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| revised edition published in 19JI by Buttermrth and Co.) GEMSTONES FOR EVERYMAN by B. W. ANDERSON...photocopying, recording, taping, or information stqrage and retrieval systems—without written permission of the...p. Includes index. 1. Precious stones—Collectors and collecting. I. Title.. QE392.A66 553’.8 75-29369...Gemstone? Names and Relationships Occurrence and Recovery of Gemstones Occurrence and Recovery of Diamonds...Diamonds Cutting and Polishing Crystals and Cubes More about Crystals How Light Behaves in Gemstones The |
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| Gemstones Michael O’Donoghue Chapman and Hall Gemstones Michael O’Donoghue Gemstones covers the whole...greatly increased and many new techniques have been developed for altering the colour and improving the quality...these materials and testing methods have become scattered through the literature and are drawn together...improvements in prospecting methods, new minerals and new varieties of existing minerals have come on to...covers more than a small number of these materials and none deals with their geological mode of occurrence |
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| Journal of Gemmology The Gemmological Association and Gem Testing Laboratory of Great Britain President...Woodward. BSc., FCA, DCA The Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville...the contributors and not necessarily of the publishers. Cover Picture Burmese sapphire crystal weighing...Gwebin, in Burma's Mogok Stone Tract. (See Burmese sapphire giants, p. 551) Photo by UKhinMg Win ISSN: 1355-4565...published. Five hundred abstracts and 99 book reviews have also appeared and together these figures offer |
