 | Souza Neto, João Adauto, Legrand, Jean Michel, Volfinger, Marcel, Pascal, Marie-Lola, Sonnet, Philippe (2008) W–Au skarns in the Neo-Proterozoic Seridó Mobile Belt, Borborema Province in northeastern Brazil: an overview with emphasis on the Bonfim deposit. Mineralium Deposita, 43 (2) 185-205 doi:10.1007/s00126-007-0155-1 | Journal (article/letter/editorial) | | Mobile Belt, Borborema Province in northeastern Brazil: an overview with emphasis on the Bonfim deposit...located in the Borborema Province in northeastern Brazil and consists of a gneiss basement (Archean to Paleo-Proterozoic)...Recife, Brazil e-mail: adauto@ufpe.br J. M. Legrand Departamento de Geologia, Universidade Federal do Rio...Rio Grande do Norte, Campus Universitário, Lagoa Nova, CEP 59.072-970 Natal, Brazil M. Volfinger : M.-L...Bonfim . Borborema Province . Seridó Mobile Belt . Brazil Introduction Skarn deposits host a large variety |  | | Book | | Professor Jacques P. Cassedanne Universidade Federal do Rio de Janeiro For his valuable participation in research...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...diamonds, as well as fine opals. A recent emerald find is producing magnificent stones. Until this book |  | | Journal (issue) | | INSTITUTE OF AMERICA Emeralds from Northeastern Brazil Diamantine: Coated Cubic Zirconia Precision Measurement...Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil J. C. (Hanco) Zwaan, Dorrit E. Jacob...Polished emeralds from this deposit in northeastern Brazil, discovered in 2006, typically display a saturated...irradiation. OVERVIEW AND UPDATE pg. 42 73 Brazil’s Emerald Industry Andy Lucas REGULAR FEATURES 31 45 47...synthetic • Diamond with unusual color zoning • Large emerald with gota de aceite structure • Artificial metallic |  | Beurlen, H., Thomas, R., Melgarejo, J. C., Da Silva, J. M. R., Rhede, D., Soares, D. R., Da Silva, M. R. R. (2013) Chrysoberyl-sillimanite association from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone exploration. Journal of GEOsciences, 58 (2) 79-90 | Journal (article/letter/editorial) | | from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone exploration Hartmut...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil; beurlen@ufpe.br Helmholtz-Centre Potsdam, German...Tranquilino Coelho Lemos 671, 58100–000, Campina Grande – Paraíba, Brazil Corresponding author The first occurrence...Borborema Pegmatite Province (BPP) in northeastern Brazil is reported from up to 0.5 m large boulders in...REL-pegmatite, Seridó Belt, Borborema Province, Brazil Received: 8 February 2013; accepted: 18 June 2013; |  | Ribeiro-Althoff, A. M., Cheilletz, A., Giuliani, G., Féraud, G., Camacho, G. Barbosa, Zimmermann, J. L. (1997) 40Ar/39Ar and K-Ar Geochronological Evidence for Two Periods (∼2 Ga and 650 to 500 Ma) of Emerald Formation in Brazil. International Geology Review, 39 (10) 924-937 doi:10.1080/00206819709465310 | Journal (article/letter/editorial) | | Periods (∼2 Ga and 650 to 500 Ma) of Emerald Formation in Brazil a a a b A. M. Ribeiro-Althoff , A...Periods (∼2 Ga and 650 to 500 Ma) of Emerald Formation in Brazil, International Geology Review, 39:10...Two Periods ( ~ 2 Ga and 6 5 0 to 5 0 0 Ma) of Emerald Formation in Brazil1 A. M. RIBEIRO-ALTHOFF, 2 A...and/or K-Ar ages have been obtained on the emerald deposits of Brazil. These include: Socotó (2104 ± 41 Ma)...that are consistent with two periods of emerald formation in Brazil—~2 Ga and between 650 and 500 Ma. The |  | | Journal (issue) | | 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,...alexandrite, tanzanite, zircon, Imperial topaz and emerald (and its most common fillers). The unit measures...and cornflower sapphire, old mine/ Muzo green emerald, sunrise and sunset padparadscha sapphire, honey-colour...including diamond, tourmaline, demantoid, spinel, emerald, corundum and instrumentation. CMS oration of |  | | Journal (issue) | | diamond, GIA Collection no. 37583 (2) a 4.50 ct emerald from Chivor, courtesy of Equatorian Imports; (3)...(3) a 1.53 pink diamond from Argyle, courtesy of Rio Tinto; (4) an 11.16 ct sapphire from Madagascar,...market was down to 42% by value and 29% by volume (Rio Tinto Diamonds, 2008). It had unloaded its diamond... PRODUCTION AND MARKETS Rio Tinto. In 2003, London-based mining giant Rio Tinto opened Canada’s second...second diamond mine, Diavik, with 60% ownership. Rio Tinto had established its own rough diamond sales channel |  | | Journal (issue) | | Laboratories do this on the basis of infrared absorption; however, most jewellers do not have an infrared...from the the Hematita Hematita mine mine in in Brazil Brazil (AL-HEMA1), (AL-HEMA1), an an alexandrite alexandrite...Dash-double dotted green curve - Hematita mine, Brazil; 2. Dash-dotted green curve - Sri Lanka; 3. Long...reminiscent of those seen in hydrothermally synthesised emerald (Figure 2). Subsequent enquiries to colleagues...parcels /. Gemm., 2000, 27, 2, 79-86 Figure 3: An emerald-cut steely blue topaz in the lower left of the |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Crystal of multicolored tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais...(Camara Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo...pedras preciosas do Brasil Bibliography 1. Gemology 2. Geology 3. Minerals - Brazil 4. Minerals- Classification... Mineralogy 6. Mineralogy - Brazil - History 7. Precious stones - Brazil I. Bartorelli, Andrea. II. Title |  | | Report (issue) | | Discovery Stoppaniite Fabio Tamagnini Page 40 Emerald and Aquamarine in Canada Lee A. Groat Page 22...morganite, emerald, goshenite, and heliodor. Known for millennia, the beryl varieties emerald and aquamarine...surrounded by the ancient mysticism of birthstones. Emerald, aquamarine and beryl were all named in Pliny's...smaragdus" referred to what would be known today as emerald; "beryllus" is the Latin term for beryl; "sea green...of emerald, the modern designations for the beryl varieties emerged much later than did "emerald" and |  | | Journal (article/letter/editorial) | | the red race,on the contrary,it mustbe confessed,do not appearto feel the blessingof a Divine descent...society^rhichllas arisen fromit.' s We beholdill Brazil,' he olJsel ves, ( p. 3,) ' a thirlly-scattel ed...placesthrough out Brazil,whichare sigllificantwordsill the Tupi tongue; and thispeopIei.sto Brazil,whatthe Caraibswereto...blanchesof the riverTapajoz,far ill the interiorof Brazil,are llOW people who still retain the only remaillsof...prillcipalsourcesof authorityalldinfluenceamongthe nations of Brazil,the authorproceedsto inquireinto the consequencesof |  | | Journal (issue) | | Minas Gerais, Brazil **University of Mainz, West Germany ***CPRM, Salvador, Bahia, Brazil 1. Introduction...of Campo Formoso Carnafba and 40 km NE of the emerald deposit of Carnaiba (Figures 1 and 2). 2). The...50 0 W Bahia Bahia BA-S BA-5 Fazenda do Pombo BA-6 A~ude Açude do Sossego BA-7 Brumado BA-8 Carnaiba Carnaîba...Salininhas BA-lO BA-10 Socoto Socotö 1. The emerald occurrences in Brazil. Fig. 1. Ceara Cearâ CE-ll Tami CE-llTauâ...Santana dos Ferros Goias Goids GO-3 Fazenda das Lajes (Itaberai) (Itaberaï) GO-4 Santa Terezinha de Goias |  | | Journal (issue) | | Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct kunzite, Brazil; (4) 8.14-ct grossular... 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...their support of this concept and their willingne~to do the work to bring the project together. Hundreds |  | | 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...Gloria & Gunther A 2001 Find of top-quality emerald crystals from La Pita at Maripi, Boyac |  | | Journal (issue) | | confined to the pavilion of the gemstone, so that they do not affect the "face-up" beauty of the stone while...on the right reveals thai most of these cavities do not detract from the "face-up" beauty of this faceted...inclusion D. 2. The compositions of glasses A, B, and C do not seem to resemble the likely composition of a...observations cannot be fully assessed, but the data do imply a distinct difference in composition between...1982).A final collection remains of garnets that do not neatly fit into any of the previously examined |  | | Book (edition) | | North 1:15M Central Argentina 1:7-5M South-East Brazil 1:7-5M 4-5 6-7 8-9 10-11 13 14-15 16 17 18-19...Roman Catholic pula (BWP) Comm., OAU, SADC, UN BRAZIL Republic BHUTAN Monarchy AREA POPULATION CAPITAL...Frrgiish Protestant. Roman Cathode hast Caribbean do ear XCD > Caricom MOROCCO Monarchy MOLDOVA Republic...South America Sao Paulo Brazil Buenos Aires Argentina Rio de Janeiro Brazil Lima Peru Santiago Chile...Horizonte Brazil Porto Alegre Brazil Recife Brazil Brasilia Brazil Salvador Brazil Fortaleza Brazil Curitiba |  | | Book | | 12-16 with enclosures. Geological landscape of the Rio Nevado canyon. The juncture between the Santander...Colombian Andes. This scaled geologic sketch of the Rio Nevado canyon was generated during detailed field-based...outcropping along the southern and northern walls of the Rio Nevado canyon, whilst maintaining the relative orientation...2000; Gutscher 2002; Syracuse et al. 2016). (*)“Facts do not cease to exist because they are ignored” (anonymous)...and along the Maracaibo orogenic float to the east, do not provide evidence of subduction-related deposition |  | | Book (edition) | | Francisco Los Angeles 91 Mexico City Sao Paulo Santiago Rio de Janeiro Buenos Aires 92 Geographical Comparisons:...America ERG Southern South America South East Brazil 1:75M Polar Regions 1:40M 76 1:15M 75 74 INDEX...Aymara RELIGION: large Roman Catholic majority BRAZIL The Sultanate of Brunei is situated on the north-west...CURRENCY: Cruzado (CZ$) ORGANISATIONS: UN, OAS Brazil is not only the largest country in South America...America but also has the fastest growing economy. Brazil is now an industrial power but with development |  | | Book (edition) | | 152-153 SOUTHAMERICA South 1:20 000 000 154-155 BRAZIL Southeast 1:7 500 000 OCEANS 122-123 REPUBLIC... countries include questions in censuses, others do Membership of selected international organizations...page 63 languages CAMEROON BRAZIL b Federative Republic of Brazil Area Sq Km 8 514 879 Religions...LOWEST POINT Peninsula Valdés LARGEST ISLAND Isla Grande de Tierra del Fuego seed i : Lae VN Ye.) a7...a7 _ LAKES sqkm sqmiles 6959 22831 | Isla Grande de Tierra del Fuego Lake Titicaca Nevado Ojos del |  | | Book (edition) | | 1:15M 7213 SouthernSouth America 1:5M 74 South East Brazil 1:75m 75 Polar Regions 1:40om 76 Key tosymbolsoncity...changing landscape. In agricultural production Brazil is one of the world’s leading exporters with coffee...Mineral resources, except for iron ore, at the moment do not play a significant role in the economy, but recent...sq miles) POPULATION: 159, 100 CAPITAL: Arawa BRAZIL STATUS: Republic AREA: 1,098,575 sq km (424,050...CURRENCY: cruzeiro (BRC) ORGANISATIONS: UN, OAS Brazil is not only the largest country in South America |  | | Book (edition) | | ranges have coordinates in the Thesaurus, while others do not. Some older geographic terms lack coordinates...Thesaurus, are added to citations on areas which do not correspond exactly to any Thesaurus term, e.g...capitalization, and level of terms. Index terms that do not validate can be accepted by overriding the validation...introduced in 1981. State in W Brazil. CO $110000S070000 W0663000W0740000 BT Brazil acritarchs Hystrichosphaeridae...W0724400W0732500 Acungui Group BT Precambrian SA Brazil SA Parana Idaho United States igneous rocks |  | | Journal (volume) | | California, Méx., Condiciones Geológicas de la Región Norte de la Costa Occidental de la Baja California, Méx...Méx.. Condiciones Geológicas de la Región Norte de la Costa Occidental de la Baja California, Méx., Datos...Baja California, Depósitos minerales de la Parte Norte Central de la Baja California, Recursos mineros...Occidental de la Región Norte de la Baja California, Recursos Mineros de la Región Norte de la Costa Occidental...Informe Relativo a la Exploración de la Región Norte de la Costa Occidental de la Baja California, Informe |  | | Book (edition) | | example: Minas Gerais State in E central Brazil. BT Brazil Brazil BA South America Specific lakes, rivers...introduced in 1981. State in W Brazil. CO SI 10000S070000 W0663000W0740000 BT Brazil Acreodi Term introduced...uniformitarianism Acungui Group BT Precambrian SA Brazil SA Parana Ada County Valid through 1988. Search...Alagoas State in NE Brazil. CO SI03000S084500 W0350000W03 82000 BT SA SA Brazil Sao Francisco Basin...1976, use was restricted to any process having to do with changes in temperature and pressure, i.e. diagenesis |  | | Book | | that show ion-exchange or reversible dehydration but do not conform to the definition of a zeolite are called...and other minerals with a zeolite-like structure do not have any aluminum or silicon at all (pahasapaite...zeolites. Minerals with "interrupted structures" do not have a framework defined by ratio O/(Si + AI)...mineralogists currently working with zeolite minerals do not consider these distorted frameworks to be grounds...from a single sector in the crystal, the results do not represent the entire crystal. Stilbite has priority; | | | Book | | that show ion-exchange or reversible dehydration but do not conform to the definition of a zeolite are called...and other minerals with a zeolite-like structure do not have any aluminum or silicon at all (pahasapaite...zeolites. Minerals with "interrupted structures" do not have a framework defined by ratio O/(Si + AI)...mineralogists currently working with zeolite minerals do not consider these distorted frameworks to be grounds...from a single sector in the crystal, the results do not represent the entire crystal. Stilbite has priority; |
|
