 | de Souza, J. L., Mendes, J. C., da Silveira Bello, R. M., Svisero, D. P., Valarelli, J. V. (1992) Petrographic and microthermometrical studies of emeralds in the âGarimpoâ of Capoeirana, Nova Era, Minas Gerais State, Brazil. Mineralium Deposita, 27 (2) 161-168 doi:10.1007/bf00197103 | Journal (article/letter/editorial) | | the 'Garimpo' of Capoeirana, Nova Era, Minas Gerais State, Brazil J.L. de Sonza ~, J. C. Mendes 1, S...Preto, Ouro Preto, Minas Gerais, Brazil 2 IG, Universidade de S~o Paulo, S~o Paulo, Brazil Received: November...the area of the Capoeirana emerald deposit, Minas Gerais State, revealed two main lithostructural units...the extent of a emeraldiferrous province in Minas Gerais State, which begins at northern Rio Casca and...terms - are represented by the mineral deposit of Itabira, discovered in 1978 S _ . . ~.~C/L~ -~4~ I~ |  | | Journal (article/letter/editorial) | | ŠSpringer-Verlag 1990 Origin of emerald deposits of Brazil G. Giuliani 1. 2 , L. J. H. D. Silva 3 and P. Couto...Couto 4 1 2 3 4 ORSTOM, Universidade de Brasilia, Brazil c.R.P.G., 15 Rue N.D. des Pauvres, BP 20, 54501...Metais Ltda, Bahia, Brazil Secretaria das Minas e Energia, C.P.R.M./SGM, Bahia, Brazil Abstract. Precambrian...Precambrian emerald deposits of Brazil are found in a typical geologic setting with Archean basement and supracrustal... Gemstone deposits are of great importance in Brazil. Agate, amethyst, tourmaline, and topaz represent |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America â Brazil and Colombia 48 Clinohumite â The Mountain Fire...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...Opening a Tsavorite Mine T anzaniteOne Limited is working towards opening a tsavorite mine not far from its...Tanzania, about 20 kilometers from its tanzanite mine. The project has a total indicated resource of 1 |  | Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) | | sub-types hosted in: (IA) Mafic-ultramafic rocks (Brazil, Zambia, Russia, and others); (IB) Sedimentary...sub-types hosted in: (IIA) Mafic-ultramafic rocks (Brazil, Austria); (IIB) Sedimentary rocks-black shale...ct. Insufu rough emerald extracted from the Kagem mine in 2015. Lastly, on the 2th of October, the remarkable...(âthe lion elephantâ) was extracted from the same mine [3]. Other giant crystals have been discovered in...emerald crystals was discovered in the CarnaĂba mine, Brazil; the specimen weighed 341 kg with 1.7 million |  | | Journal (issue) | | Era, Minas Gerais, Brazil David Stanley Epstein NOTES AND NEW TECHNIQUES The Growth of Brazil-Twinned...Potential for Synthetic Amethyst Twinned on the Brazil Law John I. Koivula and Emmanuel Fritsch Thermal...LCCAdams, Orleans, MA; Luiz Angelo, Rio de Janeiro, Brazil; Trea Arendsen, Lansing, MI; Scott M. Azmus, Corvallis...Morris, Newark, CA; Francisco Muller Bastos, Minas Gerais, Brazil; Colleen Witthoeft Nayuki, Montreal, Que...pearls range from 13 Lo 19 mm and are set with old mine-cut diamonds. The piece sold at auction for $82 |  | | Journal (issue) | | INSTITUTE OF AMERICA Emeralds from Northeastern Brazil Diamantine: Coated Cubic Zirconia Precision Measurement...the Fazenda Bonfim Region, Rio Grande do Norte, Brazil J. C. (Hanco) Zwaan, Dorrit E. Jacob, Tobias Häger...Polished emeralds from this deposit in northeastern Brazil, discovered in 2006, typically display a saturated...rock from Pakistan ⢠Catâs-eye emerald from Belmont, Brazil ⢠Meteorite watches ⢠Purple common opal from...of the publisher. About the Cover For decades, Brazil has been one of the worldâs major sources of fine |  | | Catalog/List | | 5 cm across. ÂŁ25 Tonca de Onca Mine, Virgem de Lapa Minas Gerais Brazil This is the end member of the...with some pink Hureaulite 7x7 mmCigana Mine, Galileia Minas Gerais ÂŁ36 4 BRUCITE clear silvery cleavages...matrix, not a visually attractive piece ! Ollinghouse Mine, washoe County Nevada U.S.A ÂŁ50 . 6 STELLERITE...inch ÂŁ20 Ilimaussaq Greenland Sapucai Mine, Galileia Minas Gerais about 8.5mm Seinajoki Laani Finland...by RT) Probably merclll'ian tennantite. Gortdrum Mine Tipperary Ireland ÂŁ8 13 . 14 TSUMEBITE green coating |  | | Journal (issue) | | setting Gem sapphirine is being recovered from a mine about Sapphirine is derived and obtained from rocks...Sri Lanka the gem sapphirine comes from a carats. mine located near the 9th milepost along the Abstract...Preto, Minas Gerais, Brazil **University of Mainz, West Germany ***CPRM, Salvador, Bahia, Brazil 1. Introduction...occurrences in Brazil. Fig. 1. Ceara Cearâ CE-ll Tami CE-llTauâ Minas Gerais Minas MG-l MG-1 Mina Belmont (Itabira)...in Carnaiba. With the exception of the Belmont Mine in Itabira/MG, the mining methods in the SocotĂś area |  | | Journal (issue) | | iridescence observed in ârainbowâ hematite from Minas Gerais, Brazil. 40 DNA Techniques Applied to the Identification...with extraordinary etch channels ⢠Omphacite and chromite âbimineralicâ inclusion in diamond ⢠Agate-like...iridescence in metamorphic ârainbowâ hematite from Brazil. The authors use electron microscopy, atomic force...colored by GR1 defects have been alluvial deposits in Brazil, Guyana, Venezuela, Zimbabwe, the Central African...never graded by GIA), and the 5.03 ct Aurora Green (Brazil), which sold at auction in 2016 for more than US |  | | Report (issue) | | and trapiche emerald Rupert Hochleitner Brazil: Minas Gerais, Bahia, Ceara, Goias and Tocantins . . ...Asia: Pakistan, Afghanistan and India .......6 0 Old Mine Emeralds . . . . . . . . . . . . . . . . . . . ...Maharajahs and Maharanis held large emeralds (see "Old Mine Emeralds" page 62). The Color of Islam Emerald...quality. It was the gift of Emperor Dom Pedro I of Brazil to the 6 th Duke of Devon- shire. Also housed...some of the most productive emerald localities in Brazil, for example, more than 77 percent of the emerald |  | | Journal (issue) | | Decade of Change A New Era for the Historic Coscuez Mine Esmeraldas Santa Rosa: Our Wealth is Green Rediscovery...Gemological Description of Ethiopian Emeralds Belmont Emeralds â Uncompromisingly Green Overview of Brazilâs...More Exquisite Emeralds Magnificent Old Mine Emeralds 143 Mine Visit A Visit to Colombiaâs âGreenâ Emerald...Origins and Appellation President Clement Sabbagh, Brazil Vice Presidents Damien Cody, Australia Nirmal Kumar...Kumar Bardiya, India Treasurer Marcelo Ribeiro, Brazil Secretaries Bruce Bridges, USA Santpal Sinchawla |  | | Book | | On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD...Allgood, C. Williams: Ramsdellite from the Mistake mine [Arizona] 14:333-335 ALLGOOD, ROBERT W. -with G...the Mistake mine [Arizona] 14:333-335 ALMA Famous mineral localities: the Home Sweet Home mine, [near Alma |  | | Journal (issue) | | manager Famous mineral localities: the Broken Hill mine, Zam bia..............................................351 Famous mineral localities: the Cruzeiro mine, past and present ................................Warren A new find of crystallized rose quartz in Minas G e ra is ........................................B-2120 Schoten COVER: ELBAITE on quartz from Minas Gerais, Brazil. The crystal is 8.5 mm in width. Photo by...Kitwe, Zambia HISTORY The Broken Hill lead-zinc mine is located near the town of Kabwe, 140 km north |  | | Journal (issue) | | from from the the Hematita Hematita mine mine in in Brazil Brazil (AL-HEMA1), (AL-HEMA1), an an alexandrite...alexandrite from from the the old old Tokowaja Tokowaja mine mine in in the the Ural Ural Mountains Mountains (AL-U/K9456)...â ⢠CL-SPECTRA OF ALEXANDRITES RED-NEW MINE GREEN=GLD MINE URAL. RUSSIA. BLACK-SYNTH. MASTERSTONE ALEX...1. Dash-double dotted green curve - Hematita mine, Brazil; 2. Dash-dotted green curve - Sri Lanka; 3....old Tokowaja mine, Russia; 4. Short dashed red curve and yellow curve - Malisheva mine, Russia; 5. Solid |  | | Book | | BARTORELLI ::⢠. . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA Š...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...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 |  | | Journal (issue) | | geology, and notable localities of diamond mining in Brazil, and outlines plans for future diamond production... Svisero, James E. Shigley, and Robert Weldon Brazil, which commanded global production in the 1700s...principally in the states of Minas Gerais and Mato Grosso, are presented. W hile Brazil is widely known for...Tijuco (later named Diamantina) in the state of Minas Gerais (CalĂłgeras, 1904; Leonardos, 1959; Barbosa,...and Bartorelli, 2010). For the next 150 years, Minas Gerais was the worldâs major supplier of gem diamonds |  | | | | surrounded ce ne white calcite, from!iheBluebell Mine; Riondel, Digitized by the Internet Archive...Goethite, hematite, magnetite, pyrolusite, ilmenite, chromite are in this subdivision. Non-metallic Minerals...black), p. 66 chromite (black), p. 80 rutile (brown, dark red brown), p. 118 chromite, p. 80 Yellow...(41795): Massive native gold in quartz. Mcintyre Mine, Timmins, Tisdale Tp., Cochrane Dende TOntaae ...Canadaâs Best Localities: San Antonio Mine, Bissett, Manitoba; McIntyre Mine, Timmins, Tisdale Township, Cochrane |  | | Journal (issue) | | page: Rough emeralds mined by Gemfields at the Kagem mine in Zambia. (Photo courtesy of Gemfields) CONTENTS...Gemfields Provides Insights Into Emerald Operations Belmont Head Describes Firmâşs Brazilian Mining Business...The New Dynamics of the Colombian Emerald Sector Mine Tour 44 22 32 In Search of Colombiaâs Green Dreams...Emerald Mines Education 44 50 Education and the Mine-to-Market Story Beautifying Emeralds - The Perennial...Russia: The Geology and Gemology of the Malyshev Mine Emerald Origins 88 98 106 78 4 InColor ⍠×âŹSpecial |  | | Catalog/List | | sodium and iron California San Benito River, Gem mine Black prismatic xls imbedded in syenite CROSSITE...iron silicate California San Benito County, Gem mine Compact blue-gray mass with natrolite ..... . GRUNERITE...GRUNERITE Basic iron silicate Michigan Champion, Spons mine White-tan fibrous aggregates in magnetite with stilpnomelane...manganese silicate New York Fowler, Arnold Tale mine Lavender prismatic crystalline mass ...... . LB...mass .............. South Dakota Custer, Bull Moose mine Pure white cleavable mass ........... . MM Fl |  | | Catalog/List | | ...... Utah Toelle County, Gold Hill, Gold Hill mine ~ransparent micro crystals on gossen with minor...silicate Arizona Pima County, Ajo, New Cornelia mine Sky blue micro xls and coatings on monzonite .....Derby mine White xlline lamellar mass with minor lepidolite . Virginia Amelia, Rutherford mine !r2 Lustrous...Lead telluride Colorado Saguache County, Klondike mine Cleavage plates in quartz with pyrite ............AMBLYGONITE Sodium lithium aluminum phosphate Brazil Minas Gerais, Governador Valaderas Single pale yellow |  | | Journal (article/letter/editorial) | | A R T F O R D Chemistry Department Belmont Abbey College Belmont, NC 28012 History In 1 7 6 1 , Johann...lead." T h e probable source was the Beresov gold mine, opened i n 1752. T h i s mineral from Beresov was...cabinets of Europe come from the [Beresov] gold mine . . . b u t . . . it has become very scarce, and...of chrom i u m , and even today this mineral, chromite, remains the only commercial source of chromium...personal coach with K u r t z ' s yellow. Obtaining chromite for these factories was a tedious business, however |  | Giuliani, G., France-Lanord, C., Zimmermann, J. L., Cheilletz, A., Arboleda, C., Charoy, B., Coget, P., Fontan, F., Giard, D. (1997) Fluid Composition, δD of Channel H2O, and δ18O of Lattice Oxygen in Beryls: Genetic Implications for Brazilian, Colombian, and Afghanistani Emerald Deposits. International Geology Review, 39 (5) 400-424 doi:10.1080/00206819709465280 | Journal (article/letter/editorial) | | granitic pegmatites and greisens and emerald from Brazil, Colombia, a n d Afghanistan. An i m p o r t a...contrasting and restricted ranges of δ18O values. In Brazil, emeralds related to pegmatites have a systematic...composition of the hydrother mal fluid. Relative to Brazil, the δ18O of Colombian and Afghanistani emeralds...18O-rich sedimentary or metasedimentary rocks. In Brazil, the δD composition of channels in emerald and...1992) and emerald from the Porangatu deposit in Brazil (Fallick and Barros, 1987) and the Swat deposit |  | | Journal (issue) | | currently the niost important source of emeralds in Brazil, lies northwest of Brasilia, i n the State o f...absorption bcmds; there is n o fluorescence; pyrite and chromite are the m o s t typictll inclusions,.with calcite...Institute of the Federal University o f Rio de Janeiro, Brazil; and Mr. Sauer is director o f Lapida~aoAmsterdam...Lapida~aoAmsterdam, S.A., Amsterdam Sauer, Rio de Janeiro, Brazil. 07904 Gemological Institute of America 4 Santa...motivation for many expeditions into the interior of Brazil, all with the hope of discovering emerald deposits |  | | Catalog/List | | Back Cover COVER PHOTOGRAPH: _ VANADINITE Apache mine, near Globe, Gila County, Arizona. Sharp hexagonal...... . Fl. Utah Toelle Co., Gold Hill, Gold Hill mine. .50 2.50 Transparent xls on limonite with austinite...fluo rescence under ultraviolet light. The Ojuela mine is one of Mexico's largest producers of beautiful...silicate. Arizona Pima County, Ajo, New Cornelia mine. Sky-blue micro xls and coatings on monzonite ..... Arizona Pima County, Ajo, New Cornelia mine. Sky-blue crystals and masses on and in blue shattuckite |  | | Journal (issue) | | large rubellite crystals were found in the pegmatite mine at Sakangyi. Furthermore, Bauer (Spencer transi...Angled growth structure in natural amethyst from Brazil; planes parallel to the positive rhombohedra r...in natural citrine (heattreated amethyst) from Brazil; adjacent planes parallel to the positive rhombohedron...the c-axis. 40x. Polysynthetic twinning of the Brazil law, which is also a characteristic feature of...in natural citrine (heattreated amethyst) from Brazil; opposite planes parallel to the positive rhombohedron |
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