 | | Journal (article/letter/editorial) | | as small (generally less than 2-mm) crystals on quartz crystals found in small greisen deposits in the...associated with bertrandite, fluorite, muscovite, and quartz. Specific occurrences include the Boomer, Mary...René Just Haüy in 1792 using crystals brought from Brazil in 1785. Dana (1892) gives the locality as the...gold”), Figure 2. Euclase, 2.4 cm tall, Ouro Preto, Brazil. Luiz Menezes specimen, Jeff Scovil photo. 544 ...have been reported from Brumado and Vitória da Conquista in Bahia and Cachoeiro do Itapemirim in Espírito |  | | 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...Ku Nam Nam Pai Stream 692 m Strea Aung Nam n Da Pa ream St 23°00' Nam Strea Mit m 96°45' Road...tourmaline (Figure 4d), aquamarine, spessartine, quartz, topaz, zircon and phenakite are mined. Tourmaline |  | | 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 |  | 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) | | (∼2 Ga and 650 to 500 Ma) of Emerald Formation in Brazil a a a b A. M. Ribeiro-Althoff , A. Cheilletz...(∼2 Ga and 650 to 500 Ma) of Emerald Formation in Brazil, International Geology Review, 39:10, 924-937 To...ages have been obtained on the emerald deposits of Brazil. These include: Socotó (2104 ± 41 Ma), Carnaíba...consistent with two periods of emerald formation in Brazil—~2 Ga and between 650 and 500 Ma. The age of the...Nivel Superior (CAPES), C. P. 1055, Brasilia DF, Brazil. 3 Also affiliated with Ecole Nationale Superieure |  | | Journal (article/letter/editorial) | | Paleoproterozoic crust of the São Francisco Craton, Bahia, Brazil: geodynamic features J.S.F. Barbosa a,∗ , P...40210-340 Bahia, Brazil b IRD—Representation in Brazil CP7091, Lago Sul, 71619-970 Brasilia, DF, Brazil Received...in the basement of the São Francisco Craton in Bahia. The oldest is the Gavião block in the WSW part...extends from SE Bahia along the Atlantic coast to Salvador, then northwards into NE Bahia. It is mainly...Geocronological; Geotectonic models; Mineral deposits; Bahia; Brazil 1. Introduction The essential features of the |  | | Book | | . . . . . . . . . . . . . . . . . . 35 37 4 Brazil. . . . . . . . . . . . . . . . . . . . . . . ....meeting of the meteoritical society, Rio de Janeiro (Brazil). Meteorit Planet Sci 39(Suppl):5089 Zucolotto...37(supp):A157–A184 Chapter 4 Brazil The first meteorites discovered in Brazil have unusual stories. There...of 1.5 kg. Museu Nacional UFRJ, Rio de Janeiro (Brazil), American Museum of Natural History, New York...Credit: André Moutinho www.meteorito.com.br 4 Brazil 4 Brazil 41 Fig. 4.3 Avanhandava. Credit: Instituto |  | | 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...Estado do Rio de Janeiro Maracanã, Rio de Janeiro Brazil Fernando F. Alkmim Escola de Minas Universidade...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) | | MARKETS Figure 9. Near Nova Era in Minas Gerais, Brazil, the Belmont mine operates using sophisticated...other mines in the area slowed (Weldon, 2006). Brazil witnessed a sustained slump in overall gemstone...in places like the United Arab Emirates, Russia, Brazil, India, and China—locations that would not have...discovered in Paraíba and Rio Grande do Norte states in Brazil in 1989 (Fritsch et al., 1990) and became known...plummeted, mining operations in key centers such as Brazil and Zambia curtailed or ceased production, though |  | | Journal (issue) | | Namibia, as well as Madagascar), South America (Brazil and Colombia), central and southern Asia (Sri Lanka...Pakistan; and pink to red tourmalines from Nigeria and Brazil. Diamond was mined in northern Canada for the first...jade [both jadeite and nephrite], opal, peridot, quartz, spinel, tanzanite, topaz, and tourmaline). Locality...mining also continued at traditional sources in Brazil and Africa. Large quantities of Brazilian emeralds...reserves and reduced demand. Emerald production in Brazil has since continued to decline. Several sources |  | | Journal (issue) | | Madagascar • Phenomenal fire opal • “Sunset” quartz from Brazil • Swedish Blue (slag) and Swedish Iron Ore...cultured pearls • Treated violetish blue quartz from Brazil • Circular inclusions in a diffusion-treated...DIAMONDS (Fontanella et al., 1977; Balzaretti and da Jornada, 1996). As a result, when examined with crossed...GEMOLOGY WINTER 2006 219 REFERENCES Balzaretti N.M., da Jornada J.A.H. (1996) Pressure dependence of the...flows, the most dominant being a massive red-brown quartz porphyry that is clearly visible in the field as |  | | Book | | ÍNDICE OBJETIVOS, LIMITAÇÕES E ESCOPO DA OBRA Celso Dal Ré Carneiro, Yociteru Hasui, Fernando F. M....memorian) 3 - CONHECER O INATINGÍVEL: ESTRUTURA INTERNA DA TERRA Celso Dal Ré Carneiro, Yociteru Hasui, Pedro...GEOLÓGICA DO BRASIL Yociteru Hasui 8 - QUADRO GERAL DA EVOLUÇÃO PRÉ-ORDOVICIANA: A CONEXÃO BRASIL-ÁFRICA...URUCUM Andrea Bartorelli 10d - MONTE RORAIMA E PICO DA NEBLINA, PONTOS CULMINANTES DO BRASIL José A. Vieira...Bergamaschi, Fernando F. M. de Almeida 16b - SERRA DA CAPIVARA Andrea Bartorelli 16c - CAMPOS GERAIS DO |  | | Journal (article/letter/editorial) | | 50% at some locations. The presence of shocked quartz with multiple, intersecting, planar deformation...The presence of planar deformation features in quartz, an enrichment in PGEs relative to adjacent strata...enstatite, Si-rich kamacite and troilite but also quartz and monosulfides such as oldhamite or niningerite...crystals in the melt. The undigested grains are mostly quartz or rare feldspar. Pyrite, graphite, and rutile...situ. In some bands small subhedral crystals of “quartz” can be observed, suggesting secondary recrystallization |
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Vitória da Conquista, Bahia, Brazil