 | 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...Lemos 671, 58100–000, Campina Grande – Paraíba, Brazil Corresponding author The first occurrence of chrysoberyl...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; |  | | Journal (article/letter/editorial) | | emerald mines in Colombia are becoming depleted. Brazil currently accounts for approximately 10% of world...samples from the Lened occurrence in Canada, the Muzo mine in Colombia, the Mohmand district in Pakistan, and...export values of emerald rough (Zwaan et al., 2005). Brazil currently accounts for approximately 10% of world...to 0.02% were of gem-quality. 89 Since then the mine has been re-opened and closed several times (Walton...have also been recovered from the Wodgina tantalum mine in Western Australia (Schwarz, 1991). 5.3. Austria |  | | Journal (issue) | | marketed, and merchandized. In diamonds especially, the mine-to-market process has been severely tested. Vertical...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...scapolite, sphene, spodumene, sugilite, turquoise, and zircon), as well as for regions important for cultured...reference to the country rather than to the specific mine or region. For more on the specific localities, |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahÌ mine in Bolivia, a major...of the company (Even-Zohar, 2007). Because of the mine closures, De Beers’s market share by volume fell...pink diamonds (0.51 and 0.55 ct) from the Argyle mine in Australia were part of the 2007 Argyle pink diamonds...had acquired a 32.8% interest in Angola’s Catoca mine in the early 1990s. Commissioned in 1997, Catoca...mining giant Rio Tinto opened Canada’s second diamond mine, Diavik, with 60% ownership. Rio Tinto had established |  | | Report (issue) | | beryl 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...bitumen, pyrite, monazite, K-feld spar, epidote, zircon and apatite (Ohnenstetter et al 1 998). Under pressure |  | | Journal (issue) | | currently the niost important source of emeralds in Brazil, lies northwest of Brasilia, i n the State o f...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...of emeralds before it was exhausted. Today, the mine site is flooded by the waters behind the Sobradinho |  | | Report (issue) | | crystal weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters...some pegmatites. This specimen, from Minas Gerais, Brazil, is housed in the Deutsches Edelstein Museum in...crystals are found in soils and stream gravels in Brazil. On the other hand, at high temperatures and pressures...surprise. In 1997, Gary and Mary Freeman began to mine the Orchard pit, a then insignificant pegmatite...(Laurs et al. 2003). A second location in the Deva mine, Paroon Valley, Kunar, Nuristan, Afghanistan has |  | | Journal (issue) | | 1aquamarine, Santa Maria mine, Brazil; (2) 20.10-ct peridot, Burma; (3) 21.09-ct kunzite, Brazil; (4) 8.14-ct grossular...tourmaline, Queen Mine, Pala, California; (6) 15.18-ct tourmaline, Paraiba, Brazil; (7) 10.42-ct tanzanite...38-ct ruby, Burma; (17) 3.08ct tourmaline, Paraiba, Brazil; (18) 1.85-ct fancy purple-pink diamond, Argyle...number of new localities. Fine alexandrites from Brazil, sapphires from Southeast Asia and Australia, emeralds...pegmatite gemstones (tourmaline, aquamarine, etc.) from Brazil, Pakistan, Afghanistan, and several countries in |  | | Book | | Tin Province with Special Reference to the Renison Mine IAIN 22 even ham (With) 5, Big utes) aires erage...Geochemical Indicators of the Gejiu . 430 Tin Mine and Its Neighbouring Areas Cao) Mianguang (With...{es 454 20 ee 495 Volcanic Activity in Xiling Mine Area, Guangdong Province, and Its Genetic Relationship...of Primary Tin Deposits in the Pemali Open Pit Mine, Bangka, Indonesia Empon-Ruswandi( With 10 Pisures)...(ring-structured) granites occur, for example, in Africa and Brazil. The primary deposits (greisen types and disseminations) |
|
