 | | Journal (issue) | | statue at Vientiane’s Haw Phra Kaew (Temple of the Emerald Buddha); rough and faceted sapphires from Laos...Gemstone Miners – The Case of the Tsavorite Mines in Southeast Kenya Gemology 22 30 Three-Dimensional...Gemstone and Pearl Testing 36 Emeralds from South America – Brazil and Colombia 48 Clinohumite – The...rise of new economies such as China, India, and Brazil. The challenges have been numerous as these new...every ICA member, I would like to thank the IBGM in Brazil along with every company, individual, and government |  | | Journal (issue) | | London ABSTRACT: Blue euclase from Mwame, Hurungwe District, Zimbabwe, which was first collected in the late...of other beryllium minerals. First recorded from Brazil in 1785 (Dana, 1892; Bastos, 1969), euclase has...Claims, 8 km south of Mikese Station, Morogoro District. The largest of these crystals measuring 72 x...of euclase from Muiane pegmatite, Alto Ligonha District, was made by von Knorring et al. (1964). This...Mica Fields, Hurungwe District. Mwame was formerly known as Miami, Urungwe District, Rhodesia or Southern |  | | Journal (article/letter/editorial) | | Inclusions and Gemological Characteristics of Emeralds from Kamakanga, Zambia Yi Zhang and Xiao-Yan Yu...one of the world’s major emerald-producing countries. In this study, emerald samples from Kamakanga, Zambia...and fluid inclusions. The study found Kamakanga emeralds have higher RI (refractive index) and SG (specific...than average. The common inclusions in Kamakanga emeralds are pseudo-hexagonal, dark green, brownish, or...oval platelet phlogopite; red spot or skeletal hematite; black spot, platelet, or dendritic oxide inclusions |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Journal (issue) | | SPECIAL ISSUE December 2015 WORLD EMERALD UPDATE Highlights of Bogota Symposium Colombia opened its...world’s leading emerald experts from October 13-15. The First International Emerald Symposium was a huge...around the world taking part. More than 42 global emerald specialists from governments, labs and private...Fedesmeraldas, the Colombian Emerald Federation, and supported by all the country’s emerald-related bodies and...and the Ministry of Mines and Energy, the symposium addressed the challenges and opportunities faced by |  | | Journal (issue) | | gem abstracts| Margaritologia pearl newsletter|Santa Fe Symposium proceedings|Fei cui testing in Hong...Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...Courtesy of John Dyer Gems; composite photo by Ozzie Campos. By Vittoria L. Villani, Franca Caucia, Luigi...Fritsch, University of Nantes, France; Rui Galopim de Carvalho, Portugal Gemas, Lisbon, Portugal; Lee A |  | Groat, L. A., Marshall, D. D., Giuliani, G., Murphy, D. C., Piercey, S. J., Jambor, J. L., Mortensen, J. K., Ercit, T. S., Gault, R. A., Mattey, D. P., Schwarz, D., Maluski, H., Wise, M. A., Wengzynowski, W., Eaton, D. W. (2002) MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON. The Canadian Mineralogist, 40 (5) 1313-1338 doi:10.2113/gscanmin.40.5.1313 | Journal (article/letter/editorial) | | MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON LEE A. GROAT§ Department...Columbia V5A 1S6, Canada GASTON GIULIANI IRD and Centre de Recherches Pétrographiques et Géochimiques/CNRS,...Switzerland HENRI MALUSKI Laboratoire de Géochronologie, Université de Montpellier 2, Place Eugène Bataillon...discovered a major occurrence of emerald in the Finlayson Lake district of southeastern Yukon. The Regal...contact with a mid-Cretaceous granitic pluton. The emerald crystals occur where quartz veins cut mica-rich |  | | Book | | Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted from: Minerals 2019, 9, 233, doi:10.3390/min9040233...Marshall, Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced Classification Reprinted...Mohamed, Supharart Sangsawong and Abeer Al-Alawi Emeralds from the Most Important Occurrences: Chemical...nondestructive methods. He is frequently visiting gem mines and pearl producing areas around the globe and often...Province (BPP) from Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite is classified |  | | Journal (article/letter/editorial) | | Maria da Glória da Silva a,b a Grupo de Metalogênese, Centro de Pesquisa em Geofísica e Geologia, Universidade...Universitário de Ondina, Sala 201-C, Salvador, 40170-290, Bahia, Brazil b Geological Survey of Brazil (CPRM)-Av...(CPRM)-Av. Pasteur, 404, Urca, Rio de Janeiro, 22290-240, Rio de Janeiro, Brazil Received 2 May 2004; accepted...equivalent units. A related subject has been discussed by De Wit et al. (1999), based on the interpretation of...(containing Amazonia, Congo, West Africa, and Rio de la Plata). A supercontinent named Columbia, which |  | | Report (issue) | | our way through the compet itive minefield of emerald science, much of John's contribu tion to this...any other opinion. extraLapis English No. 2: Emerald The Most Valuable Beryl The Most Precious Gemstone...we • pay tribute to John Sinkankas to whom this emerald issue is dedicated. John Sinkankas wrote more...than 15 books including his 1981 definitive work Emerald and Other Beryls. He set standards for authors...and hope that you will see his influence here in Emeralds of the World and in future issues. Gloria & Gunther |  | | Journal (issue) | | GEMOLOGICAL INSTITUTE OF AMERICA Emeralds from Northeastern Brazil Diamantine: Coated Cubic Zirconia...Points 18 pg. 3 Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil J. C. (Hanco) Zwaan...Neto, and Jan Kanis Polished emeralds from this deposit in northeastern Brazil, discovered in 2006, typically...irradiation. OVERVIEW AND UPDATE pg. 42 73 Brazil’s Emerald Industry Andy Lucas REGULAR FEATURES 31 45 47...Diamond with unusual color zoning • Large emerald with gota de aceite structure • Artificial metallic veining |  | | Journal (issue) | | FEATURE ARTICLES 464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee...of the geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review of Analytical... 637 614 Geographic Origin Determination of Emerald Sudarat Saeseaw, Nathan D. Renfro, Aaron C. Palke...F. McClure The relative chemical diversity of emeralds from different deposits worldwide allows clear...GIA to make geographic origin conclusions for emeralds. p. 655 648 Geographic Origin Determination |  | | Journal (issue) | | mining update • Profile Cut diamonds • Alexandrite-emerald intergrowth • Amethyst from Nigeria • New hiddenite...simulant), and a study of flux-grown synthetic emerald. The laboratory that GIA acquired in the fall of...dye Treated blue diamonds Hope diamond Synthetic emerald Radium-treated green diamond Dyed cultured rosé...cat's-eyes Treated jadeite bead necklace Emeralds from Brazil Famous diamond Pink conch pearl Color-change...Maxixe beryl, a material first found in 1917 in Brazil that faded on exposure to sunlight (also see Nassau |  | | Journal (issue) | | 1 . NOTES AND NEW TECHNIQUES The Santa Terezinha de Goihs Emerald Deposit 1. P. Cassedanne and D. A...s o n Editor Alice S. Kellel 1660 Stewart St. Santa Monica, C A 90404 Telephone: 12131 829-2991 Editorial...organization for the jcwelry industry, 1660 Stewart St., Santa Monica, CA 90404. Any opinions expressed in signed...was Ron Ringsrud's article "The Oil Treatment of Emeralds in Bogoth, Colombia," which was published in Fall...northwest frontier district and other Asian gem deposits. His company, TERRA, is in Santa Barbara, California |  | | Journal (issue) | | Keller FEATURE ARTICLES 80 Update on Emeralds from the Sandawana Mines, Zimbabwe J.C. (Hanco) Zwaan, Jan...Bangkok, Thailand C. W. Fryer Santa Monica, California John I. Koivula Santa Monica, California Karl Schmetzer...but small, corner on the ground floor of GIA’s Santa Monica headquarters. “But,” he said, “from the quality...gemological community. Yet, while the facilities in Santa Monica were state-of-the-art when they were first...100 miles (160 km) south of GIA’s former home in Santa Monica. The spacious Carlsbad facility can comfortably |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Journal (issue) | | Determining the geographical origins of natural emeralds through nondestructive chemical fingerprinting...natural emerald may enable their geographical point of origin (GPO) to be elucidated. Emeralds were sampled...compositional differences and the results reveal that emeralds from the six GPOs possess a chemical identity...elucidating GPOs. Keywords: chemometrics, chromophore, emerald, energy dispersive X-ray spectroscopy, precipitation...identifying and relating trace elemental differences in emeralds from the Cordillera Oriental in Colombia, differences |  | | Journal (issue) | | gemological and spectroscopic properties. pg. 89 116 Emeralds from the Kafubu Area, Zambia J. C. (Hanco) Zwaan...and gemological properties of emeralds from this, the second largest emerald-producing country in the world...sunstone from India • Staurolite in kyanite from Brazil • Obsidian with spessartine inclusions • Fluorite...lead the Institute’s groundbreaking studies on emerald fillers and diamond cut proportions. EDITORIAL...The bracelet and the 4.13 ct oval and 6.20 ct emerald cut in the rings are courtesy of Harry Winston |  | | Journal (issue) | | NUMBER SIX APRIL 1991 Cover Picture A crystal of emerald on calcite from Muzo, Colombia, from The Mineral...The writer was asked by the Director of the Escola de Gemmologia, University of Barcelona, Spain, if he...using neodymium-doped YAG and glass filters, helps to de-mystify both phenomena. Here, both diffraction gratings...students. The examinations for the School's own 'Titulo de Gemologo'as well as that of the Diploma of the GA...Dr Celades Colom's home used by the Club de Talle de Gemas de Barcelona. J. Gemm., 1991,22,6 Fig. 6 |  | | Book | | Jacques P. Cassedanne Universidade Federal do Rio de Janeiro For his valuable participation in research...Museum ofNatural History - New York De Beers Consolidated Mines Naturhistorisches Museum - Vienna Smithsonian...1982 Jules Roger Sauer ” Foreword For years Brazil has been the major producer of colored stones in...metamorphic rocks, the variety of gem deposits in Brazil is almost infinite. In addition to the mineral...assemblage one might expect from pegmatite dikes, Brazil also produces a very significant output of diamonds |  | | Journal (issue) | | Since the turn of the century the central Nigerian district of Jos, in Plateau State, has been well known...blue to very deep blue shades have come from this district during the last eight years (Bank 1984a, 1986...the granite contacts. In the 'Rafin Gabas Hills' district, the aquamarine crystals, white to pale blue topaz...accessory minerals. The latter include serpentine, hematite, zircon, cassiterite, columbite, thorite and oxides...virtually halted halted inin this thisdistrict. district. However, However, the the has littlemining miningdone |  | | Journal (issue) | | Market Research on Responsibly Sourced Diamonds | Santa Fe Symposium Proceedings 2019 | 2019 SSEF Presentations...| Pyrite and Chromite Inclusion Assemblage in Emerald | Six-Rayed Star Enstatite from Madagascar | Yellowish...Labradorite-Bytownite from Ethiopia | Quartz from Brazil with Gormanite Inclusions | Quartz from Chile with...Krzemnicki, Flavio Butini, Enrico Butini and Ernesto De Carolis The Texture and Chemical Composition of...Trapiche Ruby from Khoan Thong, Luc Yen Mining District, Northern Vietnam 726 By Isabella Pignatelli |  | | Journal (issue) | | amber • Iridescent andradite from Mexico • Star emeralds • Euclase from Colombia • Color-change fluorite...locality determination for emeralds. Shown here is a magnificent Colombian emerald and diamond necklace with...1950s. The three large emeralds in the necklace are 6.65–7.41 ct; the emeralds in the earrings are 3.27...rubies, sapphires, and alexandrites—in addition to emeralds—now receive their own gem-specific reports. In...Naturelle, Paris CHELSEA FILTERS AND SYNTHETIC EMERALDS The excellent article on the characterization |  | | Journal (issue) | | 1aquamarine, Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct kunzite, Brazil; (4) 8.14-ct... California; (6) 15.18-ct tourmaline, Paraiba, Brazil; (7) 10.42-ct tanzanite, Tanzania; (8) 6.09-ct...( 9 ) 10.45-ct tsavorite, Kenya; (10) 4.82-ct emerald, Colombia; (11) 8.31-ct pink sapphire, Sri Lanka;...38-ct ruby, Burma; (17) 3.08ct tourmaline, Paraiba, Brazil; (18) 1.85-ct fancy purple-pink diamond, Argyle...Sinlzanlzas Editor Alice S. Keller 1660 Stewart St. Santa Monica, C A 90404 Telephone: (800) 421-7250 x25 |  | | Journal (issue) | | Dirlam 150 The Capoeirana Emerald Deposit near Nova Era, Minas Gerais, Brazil David Stanley Epstein NOTES...of Brazil-Twinned Synthetic Quartz and the Potential for Synthetic Amethyst Twinned on the Brazil Law...Sinkankas Editor Alice S. Keller 1660 Stewart St. Santa Monica, CA 90404 Telephone: (800) 421-7250 x251...N e w York, NY Robert C. K a m n ~ e r l i n g Santa Monica, C A Sallie Morton Son lose, C A Alan T... Robert E. Kane Santa Monica, C A Ray Page Santa Monica, CA Emmanuel Fritsch Santa Monica, CA John |
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