 | | Journal (issue) | | ARTICLES 260 An Update on “Paraíba” Tourmaline from Brazil James E. Shigley, Brian C. Cook, Brendan M. Laurs...tourmalines are also being mined in adjacent Rio Grande do Norte State. 278 pg. 261 Spessartine Garnet from...corundum from Wyoming • Green kyanite from Bahia, Brazil • “Ruby Rock” cabochons • Tourmaline from Warner...More recently, Brendan has visited Madagascar and Brazil to obtain first-hand knowledge of important gem...of gemological topics: “Paraíba” tourmaline from Brazil, spessartine garnet from California, Malaya garnet |  | | 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...written in English, and beautifully illustrated. “Brazil, Paradise of Gemstones’, by Jules Roger Sauer, |  | | 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 |  | | Journal (issue) | | ........................................... 13 Brazil .................................................Lapidary, Hong Kong; CMP Asia, Hong Kong; GEA, Brazil; Emmanuel Piat, France; Israel Emerald Cutters...Sri Lanka Jacqui Grande, USA DIRECTORS Andrew Cody, Australia Sergio Martins, Brazil Emmanuel Piat, France...to improve the color. Some kunzite buyers from Brazil also discovered that rough crystals they purchased... CY CMY K 2006 MINING REPORT C ompared to Brazil, its land-locked neighbor, Bolivia is a small country—it |  | | 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,...Saint-Clair Fonseca Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was...material, it is likely to have been Rio Grande do Sul in Brazil, well known for its amethyst, agate and...Trade in Brazil: A Brief History and Current Status Aurélien Reys Coloured stones from Brazil have been |  | | Journal (issue) | | Cuprian elbaite from the Batalha mine, Paraíba, Brazil . . . . . . . . . . . . . . . . . . . . . . . ...corrosion surfaces, from the Medra mine, Minas Gerais, Brazil. Keith Proctor collection; Jeff Scovil photo. Visit...the U-Bild Company in Van Nuys, California sells do-it-yourself plans for about $10 showing how to build...can also be chosen. A catalog picturing hundreds of do-it-yourself projects costs $3.95 postpaid, from U-Bild... Cuprian Elbaite from the Batalha Mine, Paraíba, Brazil Wendell E. Wilson The Mineralogical Record 2531 |  | | Journal (issue) | | SPRING 2006 PAGES 1–94 “Paraíba” Tourmaline from Brazil, Nigeria, and Mozambique Lead Glass–Filled Rubies... “Paraíba”-type Copper-bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting...• Gem-quality massive pink muscovite from Brazil • Pyrope-spessartine from Tanzania • Transparent faceted...copper-bearing “electric” blue elbaite from Paraíba State, Brazil, has been one of the most sought-after gem varieties...Cu-bearing elbaites have been found elsewhere in Brazil, as well as in Nigeria and Mozambique. The lead |  | | 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) | | 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...especially a problem for emeralds from Colombia and Brazil, which led to greater market demand for African |  | | Journal (issue) | | (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...carats over the following several years (Rio Tinto Diamonds, 2006). Rio Tinto marketed its share and its Argyle |  | | Journal (issue) | | International entries are not peer-reviewed sections but do undergo technical and editorial review. Editorial...2008). Some processes remain poorly understood. Why do some areas show clinohumite with red spinel while...elements. The other trace elements detected either do not give rise to absorption in the visible range...pp. 162–168. Manson D.V., Stockton C.M. (1984) Pyrope-spessartine garnets with unusual color behavior...embraced traditional Chinese symbols, they sometimes do not apply or combine them properly, making them less |  | | Book | | some of the reasons why minerals look the way they do and are found in some places and not others. Such...the extrusive igneous rocks. The intrusive rocks do not reach the surface but on rapid cooling may cut...their crystal structure, and chemical relationships do illustrate the way in which particular species were...Twinning in quartz is virtually universal; Dauphine, Brazil and Japan twins are the most common types and twinning...dislocations help crystals to grow since fresh nuclei do not have to be continually produced. Dislocation-free |  | | Book | | 5 x 6 x 3 cm Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 em Page 252: Gypsum...biological rather than geological do not qualify as minerals, even though they do contain fibrous crystals of...environment. solidified. In some basalts of India and Brazil, these cavities are large enough for a person...ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil ° 3.3 x 2.7 x 1.8 om, 159.10 ct RIGHT: Round brilliant-cut...themselves in the ground when they hit but they wont do a lot of damage (unless they hit a car, which has |  | | Book (edition) | | the simple expositions given in Practical Gemmology do not now cover the subject adequately and a new book...to crystallize around local centres. The first to do so are those that form at the highest temperatures...ft) thick at Urubu, near Araçuai, Minas Gerais, Brazil. Fine pink and green gem-quality tourmaline has...acid members of the volcanic province in southern Brazil and Uruguay, and the fire opals occurring in small...containing amethyst from volcanic rocks in Rio Grande do Sul, Brazil. The amethyst crystals are more strongly |  | | Book | | Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted from: Minerals 2019, 9...Pegmatitic Province (BPP) from Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite...important sources (i.e., Afghanistan (Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso)...Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil. Minerals 2019, 9, 233. [CrossRef]...Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Sabina Strmić Palinkaš 1, *, Ladislav |  | | Book (edition) | | °«=a = °.ef +.. { = im Sins co! Darin’ Mi norte Carey (pd oe AP Pe meal KS Te 5} Gntr > oe...well as a plate of photomicrographs of minerals. Do not leave this book at home on your library shelf...many do, and in this way avoid getting a bad name. Or they could allow qualified collectors to do the...minerals by some special type of behavior, as we do in this book, slight differences in reaction are...objects that can be preserved in collections. They do not fade and lose their beauty, like flowers; making |  | | Journal (issue) | | serve the industry and the gem-buying public. I do not normally use this forum to talk about GIA, as...Sandawana, Zimbabwe ItabiraNova Era, Brazil Santa Terezinha, Brazil Swat, Pakistan Panjshir, Afghanistan...heated or had been heated by traditional methods do not show a Be signal above the background level....famous localities in South America (Colombia and Brazil), Asia (Russia, Pakistan, and Afghanistan), and...Zambia; Sandawana, Zimbabwe; and Itabira–Nova Era, Brazil) Group 2—Crystallization without the involvement |  | | Journal (issue) | | Mariposa County, California • Iolite from northeastern Brazil • Kyanite widely available in Tucson • “Moonstone”...zones that extend in only one direction and typically do not have sharp boundaries (see, e.g., Koivula, 2000...in the laboratory or in nature. Consequently, we do not consider the presence of this band as conclusive...plastic deformation do not show a chameleon behavior, either. However, such stones do clearly show different...and Reverse groups are related to some degree and do have significant properties in common. However, the |  | | Journal (issue) | | Amazonite in Quartz from Bahia, Brazil | Blue Apatite in Jasper from Brazil | Aquamarine Crystal with ‘Enhydro’...‘Enhydro’ Inclusion from Brazil | Catapleiite from Mont Saint-Hilaire, Québec, Canada | Chrysocolla Chalcedony...Quartz from Bahia, Brazil Gem-quality amazonite feldspar is well known from Brazil, particularly from...Souto (Gems in Gems, Teófilo Otoni, Minas Gerais, Brazil) had some new production of amazonite from Bahia...Jasper from Brazil Gem-quality blue to greenish blue apatite from Bahia State in Brazil has been known |  | | 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...(2.B. acanthite group). Monoclinic, C2/m, a,b,c Rio Blanco County. Colorado. AM. 63. 930-937. 1978. 4...mine. Edwards. St. blue masses at Brumado Bahia, Brazil. At SchneeLawrenceco.. NewYork.andon LakeHarbour |  | | Journal (issue) | | Tourmalines from New Deposits in Paraíba State, Brazil Masashi Furuya pg. 240 240 Natural Type Ia Diamond...axinite from Pakistan • Multicolored fluorite from Brazil • Cr/V-bearing kyanite from Madagascar and elsewhere...possible diamond inclusion in quartz from Diamantina, Brazil • An unusual type of phenomenal quartz • A new...blue spinel • Dyed greenish blue chalcedony from Brazil • Conference reports 276 2007 Challenge Winners...bright, obvious colors that result from most dyes do not resemble anything found in nature. Yet some dyes |  | | Book (edition) | | minerals by some special type of behavior, as we do in this book, slight differences in reaction are...Ttonteue,. os = 7 oe 7 € a q : or oe DO. bie 4 - F - wa. Y" 7 7 Illustrations Figures...Humite (-Chondrodite), Phenakite, Willemite, Garnet (Pyrope), Garnet (Almandine) 293 39 Idocrase (Vesuvianite)...objects that can be preserved in collections. They do not fade and lose their beauty, like flowers; making...over a weekend. When you have the owner’s permission do not abuse the collecting privileges granted you, |  | | Book | | Deviations 371 Bolivia, 377 332 Proportions Brazil, 378 Angles of Faceted Bulgaria, 399 333 Burma...Janeiro, Brazil; Geological ton, VA; seum, Marie and Germany; NY; Prof. Sklar, Oceanside, Rio Santa...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...been particular protector.” diadocos have to do with its last any given. C. W. mainly in India |  | | Journal (issue) | | uscovite from the Ze Pinto prospect, M inas Gerais, Brazil .................................................rose quartz from Alto da Pitora, M inas Gerais, Brazil .................................................Alves Zanazziite, a new mineral from M inas Gerais, Brazil .................................................Lavra da Ilha, Taquaral district, M inas Gerais, Brazil .................................................re o f c o b a lt-b lu e glass. Seized w ith cu rio sity a b o u t th e o rig in s o f th e c o m m o |  | | Journal (issue) | | uscovite from the Ze Pinto prospect, M inas Gerais, Brazil .................................................rose quartz from Alto da Pitora, M inas Gerais, Brazil .................................................Alves Zanazziite, a new mineral from M inas Gerais, Brazil .................................................Lavra da Ilha, Taquaral district, M inas Gerais, Brazil .................................................re o f c o b a lt-b lu e glass. Seized w ith cu rio sity a b o u t th e o rig in s o f th e c o m m o |
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