 | Yui, Tzen-Fu, Wu, Chao-Ming, Limtrakun, Phisit, Sricharn, Weerapan, Boonsoong, Apichet (2006) Oxygen isotope studies on placer sapphire and ruby in the Chanthaburi-Trat alkali basaltic gemfield, Thailand. Lithos, 86 (3) 197-211 doi:10.1016/j.lithos.2005.06.002 | Journal (article/letter/editorial) | | the Chanthaburi-Trat alkali basaltic gemfield, Thailand Tzen-Fu Yui a,*, Chao-Ming Wu b, Phisit Limtrakun...Science, Chiang Mai University, Chiang Mai 50200, Thailand Received 6 April 2005; accepted 8 June 2005 Available...(C-T) alkali basaltic gemfield in southeastern Thailand. Sapphires have O-isotope composition in the range...4.8x to +5.0x, demonstrating that the C-T placer gem corundums cannot be phenocrysts of these basalts...sub-continental mantle as the primary source for these placer gem corundums is tentatively proposed. The surface distribution |  | | Journal (issue) | | have been known to produce district of the Northern Rift Valley Province, and corundum in all possible...northwards through the Sudan appeared on the Kenyan gem market of which and Ethiopia (Bridges, 1982). some...stretches from the turn off the never appeared on the gem market. main Lodwar road to the Sudan. This is a...and peneplanation of hills, namely bluish-green gems. Lower grade rough can be used Pelekesh (1794m)... is located in the Turkana district of the Northern Rift Valley Province on the west side of Lake Turkana |  | | Journal (issue) | | JOURNAL OF THE GEMOLOGICAL INSTITUTE OF AMERICA Gem Art of the Taj Mahal and the Mughal Era Characteristics...in Corundum from Bo Welu, Thailand Fall 2019 VOLUME 55, No. 3 EDITORIAL 293 Gem Art of the Taj Mahal...Chris L. Rogers, and Robert Weldon A look at the gem ornamentation of this landmark, as well as the jewels...in Ruby and Sapphire from the Bo Welu Gem Deposit in Chanthaburi, Thailand Supparat Promwongnan and Chakkaphan...and Color of Cultured Half-Pearls from Phuket, Thailand Kannika Kanjanachatree, Napapit Limsathapornkul |  | Voudouris, Panagiotis, Mavrogonatos, Constantinos, Graham, Ian, Giuliani, Gaston, Melfos, Vasilios, Karampelas, Stefanos, Karantoni, Vilelmini, Wang, Kandy, Tarantola, Alexandre, Zaw, Khin, Meffre, Sebastien, Klemme, Stephan, Berndt, Jasper, Heidrich, Stefanie, Zaccarini, Federica, Fallick, Anthony, Tsortanidis, Maria, Lampridis, Andreas (2019) Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis. Minerals, 9 (1) 49 doi:10.3390/min9010049 | Journal (article/letter/editorial) | | minerals Article Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis Panagiotis Voudouris... Abstract: Greece contains several gem corundum deposits set within diverse geological settings...–Ti4+ pairs produce blue. Distinction of primary gem quality-rubies and sapphires in magmatic and metamorphic...southeast Asia. The use of trace element content of gem corundums, in association with their oxygen isotopic...the exploration, classification and comparison of gem corundum deposits especially those of disputed origin |  | | Journal (article/letter/editorial) | | successfully carried out and hundreds of inclusion-free gem-quality single crystals (up to 1 mm large) were produced...small amounts of cobalt (CoO = 1 wt%) in natural gems of Sri Lanka (Shigley and Stockton 1984) and in...large) included in a gem-quality blue sapphire from Bo Phloi, Thailand (reported as Bo Ploi in gemological...cobalt-rich spinel inclusion in a sapphire from Bo Ploi, Thailand. Mineralogical Magazine, 58, 247–258. Hålenius...E. and Stockton, C.M. (1984) Cobalt-blue gem spinels. Gems & Gemology, 1, 34–41. Suzuki, T., Nagai, H |  | | Journal (issue) | | Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND... R. Cavey, FGA The Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville Street...ISSN: 0022-1252 J. Gemm., 1991,22,8 458 THE GEM DIAMOND DIPLOMA GAGTL have brought together the finest...world of diamonds to produce the most comprehensive Gem Diamond home study course available. The course acknowledges...international diamond market and includes every aspect of gem diamond you will ever need to know. Following an |  | | Journal (article/letter/editorial) | | 8 cts and up to 200 cts), and quality, including gems, the U/P type dominates in Siberian kimberlites...1st level of the Christiana 132 area, Kamariza Mines, Lavrion, East Attica, Greece. This mineral phase...ÖSTERR.MINER.GES. 165 (2019) GEM-QUALITY BLACK SPINEL FROM BO PHLOI, THAILAND Kruzslicz, Á.B.1, Nasdala...Bangkok 10110, Thailand e-mail: lutz.nasdala@univie.ac.at 1 2 Since the descent of gem corundum production...production in the Kanchanaburi and Bo Phloi mining fields, western Thailand, local gem cutters have increasingly |  | | Journal (issue) | | ri GEMS&GEMOL VOLUME XXXil 0 F C O N T E N T S EDITORIAL In Honor of Robert C. Kammerling William...Gemological Challenges in Identifying Black Opaque Gem Materials Mary L. Johnson, Sl~aneF. McClure, and...Schmidt REGULAR FEATURES DO. 264 pg. 257 Gem Trade Lab Notes Gem News The Robert C. Kammerling Research...Pelt-Photographers, Los Angeles, CA, Color separations for Gems & Gemology are by Effective Graphics, Compton, CA...Fax: (310) 453-4478 Editor, Gem Trade Lab Notes C. W. Fryer Editors, Gem News Mary L. Johnson John I |  | Sutherland, Frederick, Zaw, Khin, Meffre, Sebastien, Thompson, Jay, Goemann, Karsten, Thu, Kyaw, Nu, Than, Zin, Mazlinfalina, Harris, Stephen (2019) Diversity in Ruby Geochemistry and Its Inclusions: Intra- and Inter- Continental Comparisons from Myanmar and Eastern Australia. Minerals, 9 (1) 28 doi:10.3390/min9010028 | Journal (article/letter/editorial) | | in the presence of lesser Cr contents. Numerous gem corundum-bearing sites are known in SE Asia, where...Mogok and Mong Hsu, Myanmar and East Australian gem regions involve the western Pacific continental margins...Geological Settings, Myanmar The corundum-bearing gem deposits in the Mogok area include both in situ and... and associated gem workings of the Mogok area, is shown in Figure 2. The Mogok gem stone tract at the...Myanmar and East Australian gem deposits, within the Figure Australian gem deposits, within the West Figure |  | | Book | | Mineralogy and Geochemistry of Gems Edited by Panagiotis Voudouris, Stefanos Karampelas, Vasilios Melfos... Mineralogy and Geochemistry of Gems Mineralogy and Geochemistry of Gems Special Issue Editors Panagiotis...https://www.mdpi.com/journal/minerals/special issues/Gems). For citation purposes, cite each article independently... ix Preface to ”Mineralogy and Geochemistry of Gems” . . . . . . . . . . . . . . . . . . . . . . . ...for Special Issue “Mineralogy and Geochemistry of Gems” Reprinted from: Minerals 2019, 9, 778, doi:10.3390/min9120778 |  | | Book | | Marvel over India's maharajahs, the world's greatest gem collectors, for whom no price was too great. Explore...you are a jeweler, gemologist or simply a lover of gems, this book will repay its cost many times over....ruby on public display. A product of Sri Lanka's gem gravels, today it resides at the Smithsonian in Washington...301 has yet to be surpassed for ruby. Today the gem is said to be 1n the personal collection of one of...of pure celestial blue Set i11 a golden band; A gem that owes its beauty to No lapidary's art, But to |  | | Book | | and Zirconolite Inclusions in Marble-Hosted Gem-Quality Ruby and SpinelfromMogok,Myanmar Reprinted...Secretary and Chairman for the IMA Commission on Gem Materials. In his research he has authored and co-authored...of SE Asia (Vietnam, Laos, Cambodia, Malaysia, Thailand, Indonesia, Myanmar and Malaysia), and has published...valuable gem minerals within the annals of natural gemstone studies, namely ruby, the red-colored gem variety...spectrum of gemstones, “Mineralogy and Geochemistry of Gems” [1]. That volume included several studies on ruby |  | | Journal (issue) | | Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND...Gemmological Gemmological Association and Gem Associations Association and Gem Associations course course Testing...coveted Fellowship is below and we coupon will and Gem Testing Laboratory coveted Fellowship is below and...weforward will a mark of excellence immediately and Gem Testing Laboratory Of Great Britain aonly mark of...~elephon~ _ L: I . Telephone: . _ _ _- I GEM;-.J . GEM; _J J. Gemm., 1992, 1 9 9 2 ,23, 2 3 ,3 |  | | Journal (issue) | | Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND...Gemmological Gemmological Association and Gem Associations Association and Gem Associations course course Testing...coveted Fellowship is below and we coupon will and Gem Testing Laboratory coveted Fellowship is below and...weforward will a mark of excellence immediately and Gem Testing Laboratory Of Great Britain aonly mark of...~elephon~ _ L: I . Telephone: . _ _ _- I GEM;-.J . GEM; _J J. Gemm., 1992, 1 9 9 2 ,23, 2 3 ,3 |  | | Report (chapter) | | metamorphic evolution of the Mogok Metamorphic and Jade Mines belts and ophiolitic terranes of Burma (Myanmar)...Sciences, Chiang Mai University, Chiang Mai 50200, Thailand 3 Oxford University Museum of Natural History...of Applied Geology, Western Australian School of Mines, Curtin University, Perth, WA 6102, Australia 4...et al. 2007; Searle et al. 2007; Themelis 2008). Gem spinels are also found in forsterite-bearing marbles...Watkinson 2013) and hosts the Western Granite Province tin-bearing granites of Mitchell (1977) and Cobbing |  | | Book (edition) | | © Tere crree! THE CLEVER GEM BUYER Sclaolalemcveliareln GAVIN LINSELL “She is more precious than...Anniversary Gems 293 Birthstones 294 Astrological Gems 296 Chinese Astrological Gems 297 Gemstone...the main reason invariably is that a particular gem means something special to us: they represent a story...perceptions. Now in its second edition, The Clever Gem Buyer brings the reader not only the ‘gemmological’...in an absorbing and entertaining way, The Clever Gem Buyer’s second edition includes even more gemstone |  | | Journal (issue) | | Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND...Mary A. Burland The Gemmological Association and Gem Testing Laboratory of Great Britain 27 Greville Street...C-H bond. Over the last five years, a number of gem-quality diamonds exhibiting strong C-H bands at 3107...samples examined in this study were all faceted gem-quality diamonds, on loan from private parties. They...natural green diamonds from the South African gold mines (Raal, 1969). Brief gemmological reports on chameleon |  | | Journal (issue) | | GEMS & GEMOLOGY VOLUME XLVII SUMMER 2011 G I A S Y M P O S I U M SUMMER 2011 2 0 1 1 PAGES 79 –180...VOLUME 47 Advancing the Science and Business of Gems NO. 2 PROCEEDINGS OF THE FIFTH INTERNATIONAL GEMOLOGICAL...Guild Laboratories Inc., Los Angeles Gagan Choudhary Gem Testing Laboratory, Jaipur, India Jim Clanin JC Mining...Robert Kane Fine Gems International, Helena, Montana Dr. Stefanos Karampelas Gübelin Gem Lab, Lucerne, Switzerland...Switzerland Dr. Lore Kiefert Gübelin Gem Lab, Lucerne, Switzerland John King GIA, New York Dr. Simon |  | | Book (edition) | | GEMSTONES of the \NOrld BY WALTER SCHUMANN 1. What gem should be stored in moist absorbent cotton in order...What is the "gold of the North," the earliest used gem material of all? 7. What gemstone in antiquity was...believed to still the blood and soften anger? 8. What gem has an average life expectancy of between 100 and...you know the answers to these questions, you're a gem expert! (If you don't, see the back flap for answers...Terminology 10 The nomenclature of gems 14 ll FORMATION AND STRUCTURE OF GEMS Crystal systems and shapes Table |  | | Journal (issue) | | Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND... R Cavey, FGA The Gemmological Association and Gem Testing Laboratory ofGreat Britain 27 Greville Street...the whitish kaolinitic gravel (which carries the gem material) in the foreground, the soil profile in...background. (See 'The location, geology, mineralogy and gem deposits of alexandrite, cat's-eye and chrysoberyl...Gemmological Association's course Association and Gem Association and Gem Associations course Testing Laboratory |  | | Journal (article/letter/editorial) | | presence of America’s largest hard-rock garnet mines within its borders, a famous New York garnet specimen...unconsolidated sands. Commonly associated minerals include staurolite, kyanite, andalusite, sillimanite, chlorite,...localities that have produced fine specimens or gems, or are of particular interest to mineral collectors...Excellent specimens have been found at several mines near Topsham, Sagadahoc County, Maine, particularly...Hedgehog Hill quarry, Peru, and the Melrose and nearby mines at Stoneham, Oxford County. Phenomenal trapezohedral |  | | Journal (issue) | | collectors." Petedunnite, Franklin, Franklin Mining District, Sussex Co., New Jersey However, Pete demonstrated...embarked o n new pursuits, buying and distributing bo ttled water for free to local residents, always at...Range Province in that it trends N 60° W. N early all of the ranges in the Basin and Range Province trend...1evada. While the Pioche a rea has been writ1e n a bo ut extens ively, I knew next to nothing abo ut the...000duringthe 1920 's. The prope rty was held by Pioche Mines berween /930-39, headed by John Janney. Pres. (a |  | | Report (Issue volume) | | • • • e e e e e e e • • • e A note on Canadian gems Becoming acquainted with minerals Where to look...by the Surveys and Mapping Branch, Department of Mines and Technical Surveys, Ottawa. The subject matter...Note on Canadian Gems Although this country has never been regarded as a source of gem min erals, it has...this country that it has been referred to as the 'gem of Ca nada' . Its potential as a gemstone was recognized...minerals provide much of the material for amateur gem-cutters today. Exploitation of Canada's mineral resources |  | | Book | | 3 -N APPALACHIAN MINERAL & GEM TRAILS 3 3 By June Culp Zeitner 'NS 3 v' r,. -S.’ Vv '• li ...husband Albert who focused that love on the world of gems and minerals. PREFACE Mose Are m o w rare_ :. Z7...where amomeor prospectors m a y still prospect f o r gems mai t e a l s a n d a l s o fossils a n d a r t...unequalled i n hospitality. Many friends, gem and mineral clubs, and gem and m i n e n d dealers and suppliers...n d a l s o a b r i e f h i s t o r y o f t h e gems o f e region. T h i s C h a p t e r also includes |  | | Journal (article/letter/editorial) | | it is collected for unusual mineral specimens and gems. It is especially familiar to collectors because...detrital mineral. Associated minerals include staurolite, amphiboles, the other aluminosilicates, and...medium blue, bladed crystals to 15 cm long with staurolite in quartz at Windham, Cumberland County, Maine...crystals of a fine blue color that would cut into small gems are in the British Museum according to Kunz (1892)...percent of the world’s kyanite production came from mines at Woods and Willis mountains and other sites in |
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