 | 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 ‘Garimpo’ 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...paragenesis talc + tremolite + carbonate + biotite-phlogopite + chlorite of the emerald wall rocks. Francisco...the extent of a emeraldiferrous province in Minas Gerais State, which begins at northern Rio Casca and |  | Lynch, E. P., Costanzo, A., Feely, M., Blamey, N. J. F., Pironon, J., Lavin, P. (2014) The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological perspectives. Mineralogical Magazine, 78 (7) 1571-1587 doi:10.1180/minmag.2014.078.7.04 | Journal (article/letter/editorial) | | pp. 1571–1587 The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological perspectives...gemquality faceted emeralds from the Piteiras Mine, Minas Gerais, Brazil. These data complement those of Rondeau...euhedral-to-anhedral crystals disseminated in biotite-phlogopite schist and range from 0.5 to 50 mm long. Emerald... schist-hosted emeralds. K EY WORDS : Emerald, Brazil, gemmology, fluid inclusions, microthermometry,...~10 20% of world emerald production, which ranks Brazil second after Colombia (Schwarz and Giuliani, 2002; |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America – Brazil and Colombia 48 Clinohumite – 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 |  | | Journal (article/letter/editorial) | | ©Springer-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 |  | 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...(“the lion elephant”) was extracted from the same mine [3]. Other giant crystals have been discovered in...emerald crystals was discovered in the Carnaíba mine, Brazil; the specimen weighed 341 kg with 1.7 million |  | | 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 • Cat’s-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 world’s major sources of fine |  | Giuliani, G., France-Lanord, C., Coget, P., Schwarz, D., Cheilletz, A., Branquet, Y., Giard, D., Martin-Izard, A., Alexandrov, P., Piat, D. H. (1998) Oxygen isotope systematics of emerald: relevance for its origin and geological significance. Mineralium Deposita, 33 (5) 513-519 doi:10.1007/s001260050166 | Journal (article/letter/editorial) | | (Swat-Mingora districts, d18O +15.7 0.1&), Brazil (Santa Terezinha de GoiaÂs, d18O +12.2 0.1&;...Mineralco 1996) followed respectively, by Zambia (15%), Brazil (10%), Russia (5%), Madagascar (3%), Zimbabwe (2%)...Giuliani et al. 1997b). Emerald is hosted either by phlogopite schists contained within serpentinites and talc-schists...from the western zone (mean +21.2 0.5&). In Brazil, emeralds related to peg- Fig. 1 Location of the...eastern emerald zone (EEZ ) : Chivor, GachalaÂ; Brazil ± Carnaõ ba (CA), Socoto (SO), Santa Terezinha |  | | 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 – Uncompromisingly Green Overview of Brazil’s...More Exquisite Emeralds Magnificent Old Mine Emeralds 143 Mine Visit A Visit to Colombia’s “Green” 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 |  | | 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 |  | | 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) | | 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 Socotö area |  | | Journal (issue) | | Centre, Federal University of Ouro Preto, Minas Gerais, Brazil **University of Mainz, FRG 1. Introduction...been the most important emerald mining region in Brazil until the discovery of the Santa Terezinha occurrence... a meta somatic tran sformation into biotite/phlogopite schist took place. The ultramafites can be observed:...They consist almost exclusively of phlogopite or biotite/phlogopite and are in direct contact with the...Mg6Si4O10t:OH)8 (serpentine) = KMg3ISi3A10iJ(F5 OH) 2 (phlogopite) + Mg3lSi401J(OH)2 + 2H 2 0 (talc) Near the contact |  | 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...fluid-rock interaction. Emerald and cogenetic phlogopite related to shear-zone-type deposits have a quite...composition of the hydrother mal fluid. Relative to Brazil, the δ18O of Colombian and Afghanistani emeralds...rocks. In Brazil, the δD composition of channels in emerald and the calculated for phlogopite are compatible |  | Ollier, Nadège, Fuchs, Yves, Cavani, Olivier, Horn, Adolf Heinrich, Rossano, Stéphanie (2015) Influence of impurities on Cr3+ luminescence properties in Brazilian emerald and alexandrite. European Journal of Mineralogy, 27 (6) 783-792 doi:10.1127/ejm/2015/0027-2484 | Journal (article/letter/editorial) | | Costa, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil ct ed pr Abstract: Emerald...composition from various localities (mainly from Brazil) have been studied using gated time-resolved luminescence...samples of beryl from several localities of Minas Gerais (MG), Brazil (5), from Hoggar, Algeria (1) and from...(RF) in Brazil, and Montana) and from beryl finds (Padre Paraiso and Lavra de Martinha in Brazil, Guerioun...2003). Six chrysoberyl samples from deposits in Minas Gerais State (Quilombo), in Goias State (Carnauba) |  | | 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 Firm›s Brazilian Mining Business...The New Dynamics of the Colombian Emerald Sector Mine Tour 44 22 32 In Search of Colombia’s 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 ׀Special |  | | Catalog/List | | PHONE (406) 363 3601 A.JOITE CRYSTALS New Cornelia mine, Ajo, Pima County, Arizona. Hydrated copper aluminum...and S7. 50. BOURNONITE COGWHEEL CRYSTALS Keystone mine, Crested Butte, Colorado. A lead copper antimony...xls on matrix, T/N $. 50, $1. 00 AMOSITE Penge mine, Cape Province, Republic of South Africa. A basic...$7.50 and $9. 50. ARSENOLITE CRYSTALS White Caps mine, Manhattan, Nevada. Arsenic trioxide. Very sharp...50. 2x2" $ 5.00 and $7. 50. ALLEMONTITE Samson mine, Andreasberg, Harz Mountains, Germany. An intergrowth |  | | 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 |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...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 |  | Alkmim, Fernando F., Marshak, Stephen, Pedrosa-Soares, Antônio Carlos, Peres, Guilherme Gravina, Cruz, Simone Cerqueira Pereira, Whittington, Alan (2006) Kinematic evolution of the Araçuaí-West Congo orogen in Brazil and Africa: Nutcracker tectonics during the Neoproterozoic assembly of Gondwana. Precambrian Research, 149 (1) 43-64 doi:10.1016/j.precamres.2006.06.007 | Journal (article/letter/editorial) | | evolution of the Araçuaı́-West Congo orogen in Brazil and Africa: Nutcracker tectonics during the Neoproterozoic...Escola de Minas, Universidade Federal de Ouro Preto 35.400.000 Ouro Preto, Minas Gerais, Brazil b Department...Universidade Federal de Minas Gerais, 31.270.901, Belo Horizonte, Minas Gerais, Brazil d Department of Geological...Atlantic—the Araçuaı́ orogen now underlies eastern Brazil, whereas the West Congo belt fringes central Africa’s...in the Cretaceous, the São Francisco craton of Brazil was connected to the Congo craton of Africa, creating |  | | Journal (article/letter/editorial) | | muscovite is sometimes mistaken for biotite and phlogopite. The streak is white (Anthony et al. 1995). Muscovite...in tin-tungsten deposits (such as the Panasquiera mine) and is a constituent of granite, aplite, gneiss...muscovite with quartz, 6.8 cm wide, from the Santo Niño mine, Patagonia district, Santa Cruz County, Arizona...locality is the Palermo No. 1 mine, near North Groton, Grafton County. This mine is known for its cornucopia...a few. Also in Grafton County is the Keyes mica mine, near the town of Orange, the premier muscovite |  | | 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) | | Nineteen, Number Three Articles The Tonopah-Belmont mine, Maricopa County, A rizona by G. B. Allen &...........221 COVER: ANGLESITE from the Touissit mine, Morocco. The large crystal measures 4.5 cm. This...Chichibu mine” (by Kuniaki Kato and Hidemichi Hori), “ Collecting report: Hikagezawa gold mine, Shizuoka...Andover Avenue Sun City, Arizona 85351 he Tonopah-Belmont mine is a micromounter’s paradise. An un common...sulfates, molybdates and chromates can be found at the mine. The abundance of species makes it an ideal introduction |  | | 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 |  | | 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 |  | | Journal (issue) | | iridescence observed in “rainbow” hematite from Minas Gerais, Brazil. 40 DNA Techniques Applied to the Identification...iridescence in metamorphic “rainbow” 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...America has yielded a number of green diamonds from Brazil and Guyana (figure 7). Most show extensive surficial |
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