 | | Journal (article/letter/editorial) | | S o u t h Africa Kerala ]lmenite, magnetite, rutile, spinel, 118. Chavara: ilmenite, 118. Manavalas...AMERICA Bolivia Coehabamba: crocidolite, 291. Brazil Bahia NORTH AMERICA Greenland flimaussag:... perovskite, pyrochlore, 544. Paraiba Alto Feio, Pedra Lavrada: bismoclite, bismuth, bismutite, 785....mine: vivianite, 427. Pedra Branea mine, Pedra La~rada: arrojadite, 427. Pedra Lavrada : bismutotantalite |  | Beurlen, H., Barreto, S. B., Silva, D., Wirth, R., Olivier, P. (2007) TITANIAN IXIOLITE - NIOBIAN RUTILE INTERGROWTHS FROM THE BORBOREMA PEGMATITIC PROVINCE, NORTHEASTERN BRAZIL. The Canadian Mineralogist, 45 (6) 1367-1387 doi:10.3749/canmin.45.6.1367 | Journal (article/letter/editorial) | | – NIOBIAN RUTILE INTERGROWTHS FROM THE BORBOREMA PEGMATITIC PROVINCE, NORTHEASTERN BRAZIL Hartmut BEURLEN§...Hélio Ramos s.n., 50740–530 Recife, Pernambuco, Brazil Sandra Brito BARRETO Deptamento de Geologia, Universidade...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil Dailto SILVA Instituto de Geociências, IGE–UNICAMP...Barão Geraldo, 13083–970 Campinas, São Paulo State, Brazil Richard WIRTH GeoForschungsZentrum Potsdam, Telegrafenberg...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil Abstract Intergrowths of orthorhombic and tetragonal |  | | Journal (article/letter/editorial) | | h i s i n d e x . Acari, Rio Grande do Notre, Brazil, Bismutotantalite, 785. Adularia,Zambia, cryst...561; Rajasthan, India, 1018. Alto Feio, Pedra Lavrada, Paraiba, Brazil, bismoclite, bismuth, bismutite...li. Arrojadite, Brazil, d.t.a., 427. Arsenic, geochemistry of, 88. Arsenobismite, Brazil, 785. Artern,...Bancroft, Ontario, peristerite, 165. Barbosalite, Brazil, 784. Barium feldspars, see Barinm-orthoclase,...Bismoclite, Brazil, 785. Bismuth, native, Brazil, 785. Bismuthinite, Brazil, 785. Bismutite, Brazil, 785. Bismutotantalite |  | Beurlen, Hartmut, Da Silva, Marcelo R. R., Thomas, Rainer, Soares, Dwight R., Olivier, Patrick (2008) Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita, 43 (2) 207-228 doi:10.1007/s00126-007-0152-4 | Journal (article/letter/editorial) | | fractionation in the Borborema Province, Northeastern Brazil Hartmut Beurlen & Marcelo R. R. Da Silva & Rainer...Borborema Pegmatitic Province (BPP), northeastern Brazil, is historically important for tantalum mining...the production of gem quality, turquoise blue, ‘Paraíba Elbaite.’ With more than 750 registered mineralized...(EMPA) of columbite, tapiolite, niobian– tantalian rutile, ixiolite and wodginite group minerals from 28...n., Cidade Universitária, 50740-530 Recife, PE, Brazil e-mail: beurlen@terra.com.br M. R. R. Da Silva |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Journal (issue) | | Crystallized and massive rose quartz deposits in Brazil Jacques P. Cassedanne, Cassedanne, D.Sc.,* D.Sc...910, 21.910, Rio Rio de de Janeiro, Janeiro, Brazil Brazil *Institute of **Roditi Jewellers, Avenida Rio...Branco 39, 15,20.090, 15, 20.090, Rio de Janeiro, Brazil Abstract Brazilian rose rosequartz quartzoriginates...Borracha (State of Pernambuco) and Alto Feio (State of Paraiba). Paraíba). Geology, mining, mineralogy and...pegmatites are scatteredinineastern easternBrazil. Brazil. scattered The crystallized rose quartz pegmatites |  | | 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 |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...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...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Journal (issue) | | much from Sri Lanka, Australia and Colombia and Brazil, but what impressed me most was the extent of the...refractive indices, the only noteworthy one being rutile (2.616-2.903). (5) After the measurements the 3-way...Sphene GGG Cubic Zirconia Strontium Titanate Diamond Rutile 1.83 1.89 1.93-1.99 1.90-2.02 2.03 2.15 2.41 2...fluorspar and rutile: Brewster angle for fluorspar = arc.tan 1.43 = 55° Brewster angle for rutile = arc.tan...(P.B.), WILSON (W.E.). Hydroxyl-herderite from Brazil and a guide to species nomenclature for the he |  | | Journal (issue) | | Minas Gérais, Brazil. See 'The location, geology and mineralogy of gem tourmalines in Brazil' on pp. 263-98...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...Tourmaline, pegmatite, eluvial deposits, gem mining, Brazil © Gemmological Association and Gem Testing Laboratory...the most remarkable coloured gemstones mined in Brazil where, erroneously, for a long time it was marketed...the chatoyancy of some elbaites from northeastern Brazil can be attributed to channel leaching. Pseudomorphs |  | | Journal (issue) | | working: Brejinho's amethyst deposits in Bahia, Brazil.) Bull. Assoc. Franc. Gemmologie, 31,14; 32,7-9...in the central south-west of the state of Bahia, Brazil, about 430 km west-south-west of Salvador. Amethyst...pegmatite a quartz rose du Alto Feio. (Rose quartz-bearing pegmatite at Alto Feio.) Revue de Gemmologie,...1978. Alto Feio lies in the north of the Brazilian state of Paraiba, in the north-east of Brazil. Alto...Virgem da Lapa in the north-east of Minas Gerais, Brazil. Topaz, either yellow or blue, tourmaline, black |  | | Journal (issue) | | spinel, (9) 4.82 ct purple sapphire, (10) 5.32 ct Paraíba tourmaline, (11) 2.16 ct demantoid, (12) 1.05 ct...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...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) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x...described two topaz cat'seyes, one blue of 7.98 ct from Brazil and another colourless of 12.20 ct from Sri Lanka |  | | Book | | Occurrence: The Americas 63 USA 64 Mexico 72 Panama 75 Brazil 75 Canada 80 7 Occurrence: Rest of the world 81...quartz crystals come from the State of Minas Gerais, Brazil, and occur in vugs or pockets which are found in...number of characteristic minerals, including sphene, rutile and fluorite as well as quartz. These minerals...growth condition but it has been observed that Brazil twinning (see below) is very frequent in amethyst...Figure 2.6 Examples of Dauphine twinning Brazil twinning In Brazil twinning the parts are related by reflection |  | | Journal (issue) | | Minerals McCullough Fossils Menezes, Luiz, Minerals - Brazil Midwest Minerals Mineral Exploration Services Mineral...S. JEM, Inc. Usman Imports Valadares Minerals - Brazil West Coast M ining Wolfe, Tom, Minerals Wright's...Record, volume 31 , March-April, 2000 Rutile T i0 2 M icroscopic rutile inclusions in arsenopyrite have been...Show on Saturday, February 12, 2000. Minerals o f Brazil were the feature of the 2000 Tucson Show and were...were the subject of the 2000 mineral symposium. Brazil is the fifth largest country in the world and the |  | | Journal (issue) | | synthetic moissanite • Fracture fillers in ruby • Paraíba tourmaline 260 Gem News • APEC 2000 report •...Colombia • Lavender sugilite with green spots • Paraíba tourmaline update • “Winebottle” tourmaline • Magnetic...influenced by the presence of tiny inclusions such as rutile or ilmenite that reach the surface of the host...Na- and/or K-rich sanidine), zircon, columbite, rutile, hematite (sometimes in solid solution with ilmenite)...Geological Congress, August 6–17, Rio de Janeiro, Brazil. Smith C.P., Kammerling R.C., Keller A.S., Peretti |  | | Book (edition) | | Salinas, Peru, H Variscite, xx 5 mm, Iturnbiara, Brazil, H Rhodocbrosite, polished, 50 mm, Capillitas,... China, H Page 1: MuscO\ite. 45 mm, Linopolis, Brazil, H Page 2: Vivianite, I 00 mm, Huanzala, Bolivia...Ethiopia, G Page 12: Brazilianite, 35 mm, Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California...purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite, sursassite, ardennite, Triclinic....Tirol, Austria, and at Passo di Vizze, Trentino-Alto Adige, Italy. Actinolite asbestos occurs mainly |  | | 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...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 | | Deviations 371 Bolivia, 377 332 Proportions Brazil, 378 Angles of Faceted Bulgaria, 399 333 Burma... Cajon, Schmetzer, Heidelberg, De Janeiro, Brazil; Geological ton, VA; seum, Marie and Germany;...date of 1000 of Brazil. by the aborigines 40 Kunz inch (25 Indians of Brazil. these minerals In...pre-Columbian sites of Code, grave tematically of Brazil. labret made from a Colombian emeralds countries...fossils, crystals, misnomer which lasted into Brazil them into fifteen placing terminated semblance |  | | Book | | designations have been used rather than more fanciful ones—rutile (synthetic) in preference to titania, for example...celebrated Golconda mines being in the Madras area; in Brazil, from Diamantina, Minas Gerais; from South Africa...and from the Morro Velho gold mine, Minas Gerais, Brazil. Treatment. As for chalcopyrite. Acanthite and...composition to joseite. Localities. From Minas Gerais, Brazil. Molybdenite MoS2 An important ore of molybdenum... Ives areas of Cornwall. Peru, Bolivia, Chile, Brazil, Japan and Mexico also provide excellent material |  | | Book | | substance to a temperature below its melting point; the rutile in star corundum precipitates out in star-like...emerald and corundum pyrite in corundum and emerald rutile in quartz spinel in ruby zircon in garnet, corundum...emerald • quartz in aquamarine, topaz and emerald • rutile in corundum, quartz and andalusite • sphene in... The mineral responsible is the titanium oxide rutile, TiO, which at normal temperatures is randomly...in the crystal. On annealing of the crystal the rutile precipitates out at right angles to the vertical | | | Book | | substance to a temperature below its melting point; the rutile in star corundum precipitates out in star-like...emerald and corundum pyrite in corundum and emerald rutile in quartz spinel in ruby zircon in gamet, corundum...emerald • quartz in aquamarine, topaz and emerald • rutile in corundum, quartz and andalusite • sphene in... The mineral responsible is the titanium oxide rutile, Ti0 2 which at normal temperatures is randomly...in the crystal. On annealing of the crystal the rutile precipitates out at right angles to the vertical |  | | Book | | Rubace 154 Nacre 154 Ruby Obsidian 157) Rutile Odontolite 158 Tiger's-Eye 190 213 Topaz...materials Quartz crystals from Corinto, Minas Gerais, Brazil. Height: 15 cm. Sorbonne collection using gravity...Washing diamond-bearing gravel in Minas Gerais, Brazil. Photo: tals of such minerals as quartz, fluorite...and a jeweler might then speak of a ‘root’ as Brazil Length: 9 cm. K. Proctor collection, United States... These unique conditions of gem prospecting in Brazil illustrate the willingness of men to endure extreme |  | | Journal (issue) | | Well-formed crystals also occur in Peru, Bolivia, Chile, Brazil, Japan and Mexico. 'Sand dollars' are particularly...was the rose cut. The discovery of diamonds in Brazil in the early decades of the eighteenth century...diamond-cutting industry based on rough being imported from Brazil. Bauer39 also quotes Geneva as the source of cut...imitations; (2) phianite (zirconium oxide) and (3) rutile. near infrared auricalcite, natural blue sodalite... A kunzit e cat's-eye weig hing 113.32 ct from Brazil is described as are phosgenites from Morocco. Schungite |  | | Book | | original one; examples are quartz on calcite and rutile on hematite. Some faces of a host crystal are preferred...walls of cavities in which later crystals form. Rutile can occur in quartz in this way. The lack of any...orientation relative to the quartz shows that the rutile was formed first. Quartz commonly forms late and...because the amount of the included material, such as rutile in corundum, can be controlled to give the best...described above. In some materials, such as synthetic rutile, the two rays diverge quite strongly, however, |
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