 | | Journal (article/letter/editorial) | | Moeda Formation within the GandarelaSyncline,Minas Gerais,Brazil W. E. L. MINTER, Departmentof Geology,Universityof...F. E. RENGER, AND A. SIEGERS Minas Novas Ltda., Belo Horizonte, Brazil Abstract Gold-bearingplacerconglomerates...progressivelymore of the hitherto unofficiallyproMinas Gerais,Brazil (Fig. 1). This area, extending ducedgoldwasbought...pyrrho- of the conglomeratic,reniform piecesof quartz and tite, and arsenopyriteand occurin metavolcanicand...depositsthat have been weatheredfrom presenceof quartz veinson the contactbetweenthe 0361-0128/90/1080/943-9 |  | | Book | | 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...written in English, and beautifully illustrated. “Brazil, Paradise of Gemstones’, by Jules Roger Sauer,...Century. The book is a showcase ofthe best from Brazil and it makes a handsome evocation of what is beautiful |  | | Journal (article/letter/editorial) | | The EBPP is situated mainly in the State of Minas Gerais, but encompasses also parts of the States of...Universidade Federal de Minas Gerais, Av. AntoÃnio Carlos 6277, 31 000 Belo Horizonte MG, Brazil the context of...Argentina, (2) the north-eastern or Borborema in Brazil, and (3) the Eastern Brazilian. A description of...pegmatites of the north-eastern Pegmatite Province of Brazil and their geochemistry have been studied by Beurlen...Province (EBPP) is situated mainly in the State of Minas Gerais but also encompasses the southern part of the |  | | Journal (issue) | | epidote deposits of the Capelinha Region, Minas Gerais, Brazil ......................................315...epidote on matrix, 4.4 cm, from Capelinha, Minas Gerais, Brazil. Gail and Jim Spann collection; Tom Spann...w. FineMineral.com Tourmaline Cruzeiro Mine, Brazil. 19.5 cm Fine Minerals International proudly invites...EPIDOTE DEPOSITS OF THE CAPELINHA REGION, MINAS GERAIS, BRAZIL Andrea Bartorelli1 Carlos Cornejo2 Mario...mid-1960s, the Capelinha region in the State of Minas Gerais, Brazil, has become world-famous for producing beautiful |  | 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 |  | | Book | | MINES AND MINERALS IN BRAZIL --= ··--· ··- ·-·=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr·icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Journal (article/letter/editorial) | | commonly xsociated with brookite, rutile, hematite. quartz. titanite, and o r t h d a s e ( v x . adtilaria)...the Eldorado mine, Montgomery County, and with quartz in Alexander County (Genth 1891). Sharply formed...Marathon County. Wisconsin, and occurs with acmite and quartz crystals in the Diamond Jo quarry and nearby localities...of fine anatase. there are several localities in Brazil that have produced good crystals. These include...Risse specimen, Jeff Scovil photo. cm); the Minas Novas mine; an occurrence near Lavrinha; and somewhat |  | Amaral, Leandro, Caxito, Fabrício de Andrade, Pedrosa-Soares, Antonio Carlos, Queiroga, Gláucia, Babinski, Marly, Trindade, Ricardo, Lana, Cristiano, Chemale, Farid (2020) The Ribeirão da Folha ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary rocks. Precambrian Research, 336. 105522 doi:10.1016/j.precamres.2019.105522 | Journal (article/letter/editorial) | | ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary...ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary...ophiolite-bearing accretionary wedge (Araçuaí orogen, SE 2 Brazil): New data for Cryogenian plagiogranite and metasedimentary...Chemaled,1 6 7 a Universidade Federal de Minas Gerais, Programa de Pós-Graduação em Geologia, CPMTC-IGC-UFMG...6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil 9 b Instituto de Geociências, Universidade de |  | | Journal (issue) | | and Anthony R. Kampf Gem Pegmatites of Minas Gerais, Brazil: Exploration, Occurrence, and Aquamarine...the northeastern section of the state of Minas Gemis, Brazil. The history of gem exploration and m i n...Te6filo Otoni-Marambaia pegmatite district of Minas Gerais. As is common with most aquamarines, the stones...gem pegmatite regions of the 20th century: Minas Gerais, Brazil. With these articles, we hope to take you...what pegmatite gems have meant historically in Brazil and the production of one very important pegmatite |  | | Report (chapter) | | Neoproterozoic Macaúbas Group, Araçuaı́ orogen, SE Brazil A. C. PEDROSA-SOARES1*, MARLY BABINSKI2, CARLOS...FRANCISCO VILELA1 1 Universidade Federal de Minas Gerais, Instituto de Geociências-CPMTC, Campus Pampulha...Pampulha, 31270-901 Belo Horizonte, MG, Brazil 2 Universidade de São Paulo, Instituto de Geociências...Cidade Universitária 05508-080 São Paulo, SP, Brazil *Corresponding author (e-mail: pedrosa@pesquisador...eastern margin of the São Francisco craton (SE Brazil). The Macaúbas basin evolved from a late Tonian |  | | Report (chapter) | | Federal de Minas Gerais, IGC-CPMTC, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil (e-mail: pedrosa@pesquisador... Campus do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil 3 Royal Museum for Central Africa, 3080 Tervuren...São Paulo, Brazil 5 Serviço Geológico do Brasil-CPRM, 70830-030 Brası́lia, DF, Brazil Abstract:...located to the SE of the São Francisco Craton in Brazil, and to the SW of the Congo Craton in Africa. From...domains located to SE of the São Francisco Craton in Brazil, and to SW of the Congo Craton in Africa (Fig. |  | | 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,...(Figure 4b), spessartine (Figure 4c), almandine, quartz, zircon, apatite, topaz, sillimanite, fluorite...tourmaline (Figure 4d), aquamarine, spessartine, quartz, topaz, zircon and phenakite are mined. Tourmaline...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in |  | | Journal (article/letter/editorial) | | Reviews—Hartt's Geology of Brazil. BBVIEWS. I.—SCIENTIFIC RESULTS OF A JOURNEY IN BRAZIL. By Louis AOASSIZ,...travelling companions. GEOLOGY AND PHYSICAL GEOGRAPHY OF BRAZIL. By CHAS. FRED. HARTT, Professor of Geology in...sketch of the -Geology and Physical Geography of Brazil, will be agreeably disappointed; for the six hundred...Professor Hartt was not content with his gleanings in Brazil, made during the brief period occupied by the "...geology of Brazil, proved so veryattractive to me, that on the year following I returned to Brazil and spent |  | | Catalog/List | | ............. 1500. 14. AMETHYST QUARTZ, Rio Grande do Sul, Brazil. This is one of the most wonderful...very large (l-l/2xlxl/4) brown crystal flat on quartz matrix. Another classic New York City specimen...ELBAITE, Cruzeiro Mine, Gouvemador Valadares, Minas Geraes, Brazil. A vcry imprcssivc, doubly-terminated crystal............. 500. 25. CHRYSOBERYL, Minas Novas, Minas Geraes, Brazil. A riker-mount box containing nine...probably put together by him during his many trips lo Brazil in the 1970's ................................ |  | | Book | | original: Norte-Americano: “GEOLOGY AND PHYSICAL OF BRAZIL” GEOGRAPHY Esta tradução & propriedade literarta...Provincia do Espírito Santo . ME =»Provincia de Minas Gerais cecesesmereo IV — Ilhas é Resifes do Cocal dos...Santa Catasina o Rio Grande do Sul . XVIII — As minas de ouro do Brasil XIX— Resumo da geologia do Draril...principais rios, percorrendo os distritos de Mucurf c Minas No- 6 Cuartes Freverick HarTr vas; estudo dos...publicação da obra “Geology and Physical Geography of Brazil”, pasa satisfazer ao pedido de Louis Agassiz para |  | | 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 |  | | Book | | a U a < O SCIENTIFIC RESULTS or A JOURNEY IN BRAZIL. ¿T. LOUIS AGASSIZ, ’H I S TRAVELLING COMPANIONS...COMPANIONS. GEOLOGY AND PHYSICAL .OF B y GEOGRAPHY BRAZIL. ÓH. FBED . HARTT, P R O F E S S O R o r Q B...volume on the Physical Geography and Geology of Brazil as a summary of the scieutiftc results of my explorations...is the result of two journeys made by myself in Brazil. The first was undertaken under the direction of...the jour ney is- to be found in the “ Journey in Brazil,” it is not necessaiy to repeat it here. My companion |  | | Journal (issue) | | Cover: Inclusion of quartz and rutile needles within quartz. See article, “The Hidden Beauty of Brazilian...Emerald Business in Colombia Focus on Brazil 36 30 Booming Brazil – A Rising Star in the Jewelry Industry...Gemstones 52 Interesting New Gemological Finds in Brazil Mining 62 Andesine in Tibet – A Second Field...Oliveira (2005) describes cases in Campos Verdes, Brazil where inexpensive projects have resulted in concrete...Mining and Local Development: Three Case Studies in Brazil, 31pp. • Sarassin, B., 2006. The mining industry |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...France acquired his remarkable collection of giant quartz crystals, exhibited in the National Museum of Natural...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...CRYSTALS GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta...Crystals GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW |  | | Book | | Revival of Zacatecas D.A. Brading 303 13 Colonial Brazil: The Gold Cycle, c. 1690-1750 A.J.R. Russell-Wood...Press. Chapter 13: A.J.R. Russell-Wood, 'Colonial Brazil: The Gold Cycle, c. 1690--1750', in ed. Leslie...Granada may have been in go]d, it was outdone by Brazil. Total Brazilian output is much disputed, but the...led to the emergence of a zone soon known as Minas Gerais. or ' General Mines'. Deeper prospecting into...of mineral wealth came great changes in colonial Brazil: wes tward expansion o f the area tru ly settl |  | | Book | | Alkmim Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent Regional...Alkmim • Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent 123...Janeiro Maracanã, Rio de Janeiro Brazil Fernando F. Alkmim Escola de Minas Universidade Federal de Ouro...Preto Ouro Preto Brazil Umberto G. Cordani Universidade de São Paulo São Paulo Brazil ISSN 2364-6438...significant contributor to the mining industry in Brazil. This book provides a state of knowledge overview |  | | Journal (issue) | | the CapelinhaMalacacheta Area (State of Minas Gerais, Brazil)..........................................Selection of Superb Gem Minerals recently acquired in Brazil. Also the Finest Dark Blue-Green Amazonite Groups...ONLY 206 SPECIALIZING IN AMAZONSTONE & SMOKY QUARTZ SPECIMENS Paterson, N .J. 07 5 0 5 FINE MINERALS...southern part of the district in veins of massive grey quartz. September—October, 1974 Table 1 List of vein...hematite F e2 0 3 kaolinite A l 2 (Si2 0 5 )(0 H ), quartz S i0 2 siderite FeCO, wolframite (Fe,Mn) W 0 4 |  | | Journal (issue) | | Alexandrite from the Pegmatite Districts of Minas Gerais, Brazil Keith Proctor 33 Faceting Large Gemstones...alexandrites near the town of Hematita in Minas Gerais, Brazil; in less than three months in 1987, more...aquamarine, like the material from Coronel Murta (Brazil) and Tongafeno (Malagasy Republic). As we have...origin of color in two common varieties of quartz: smolzy quartz and amethyst. In all smolzy q;artz crystals...visible range and induces the typical smolzy color. Quartz will become completely black if the radiation is |  | | Journal (issue) | | APRIL 1993 Cover Picture The Hematita mine in Minas Gérais in 1987 - probably the richest alexandrite...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil' pp. 333-54) ISSN: 0022-1252 F.G.A. your key...apatite in spinel and corundum, and biotite in quartz. Conclusion Although the inclusion in spinel focused...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil JacquesCassedanne, Cassedanne, D.Sc.,* Maurice...Fundiio, Fundão, 21,910, Rio de Janeiro, Janeiro, Brazil *Institute of Geosciences UFRJ-CNPq, Cidade Universitaria |  | | Book (edition) | | reflection of light in 3 a stone 9 Diamond 9 4 Quartz 10 5 Path of rays in a brilliant 10 6 Dispersion...Rhombic dodecahedron 49 lcositetrahedron 49 Group of quartz crystals 63 Plates 1 2 3 4 5 6 7 8 Corundum... 58 Jade Faci11g p. 58 Opal group Facing p. 59 Quartz group Faci11g p. 59 Figure 1 Plan of the Gemstone...Calcite Fluor spar Apatite 6 7 8 9 10 Feldspar Quartz To paz Corund u m Di amond In practice only the...hardness is obtained. Thus, if the specimen resists quartz but yields to topaz, its hardness lies between |
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