 | | Journal (article/letter/editorial) | | pp. 627-651 Origin of Topaz DepositsNear Ouro Preto, Minas Gerais, Brazil DoNAn) R. O•.SEN Abstract...Abstract Topazdeposition near Ouro Preto,Minas Gerais,Brazil, tookplacein the Sabar/• formation,a Precambrian...Precambrian phylliteof considerable compositional range. Topaz and othermineralsweredeposited in andadjacentto...theformation deforms by flowage, andlittleor no topaz was deposited. Topaz,specularite, and euclasewere deposited...wasproduced concurrently with andslightlyafter the topaz. Quartz andmuscovite, whicharealwayspresent in thetopaz-bearing |  | | 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 | | ltatiaia, Conseilheiro Pena, Governador Valadares, Brazil (Roger Titeux collection, France) 4 inches. Above:...inches. Right: Rutile in quartz, lbitiara, Bahia, Brazil (Yves Gillet collection, France) 1.2 inches. Preceding...Preceding pages: A Tourmaline, Minas Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San Diego County...order to extract the gems. Such was the case in Brazil with diamonds; it is still used in the deposits...pegmatites, with a high content of beryl, tourmaline, topaz, etc. - or be deposited by solutions: - in existing |  | | 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 (article/letter/editorial) | | DISCUSSIONS ORIGIN OF TOPAZ DEPOSITS MINAS GERAIS, NEAR O URO PRETO, BRAZIL topaz depositsnear Ouro Preto...Preto, Minas Gerais, Bra- 2. The author comparestwo very different geologicalenvironments,suchas the...overlooksthe facts that volcanicactivity in the Minas seriesis lacking ing of sucha problem. In spiteof...deepalteraown conclusions. tion of the host rocksat the topaz depositsresulted To summarize,the succession of...possibleif superimposition tectonic cycles affecting the Minas serieswere posdeposits. tulated. If so, the paper |  | | Journal (article/letter/editorial) | | PAPER Polycrystals of Bimperial^ topaz from Minas Gerais state, Brazil Teodoro Gauzzi 1 & Gilberto Álvares...BImperial^ topaz is a gemstone variety that occurs in the Ouro Preto region (Minas Gerais state, Brazil). Polygonal...Polygonal sectors within the core and rims of topaz crystals, were optically observed but without consensual...crystallographic orientations within Bimperial^ topaz and relate the polygonal sectors with the compositional...and homogeneous major composition of Bimperial^ topaz. Electron backscatter diffraction maps collected |  | | Journal (article/letter/editorial) | | transparent, faceted gem stones of rose quartz from Brazil, weighing 73.50 carats and 17.50 carats respectively...donated an excellent faceted green gem apatite from Brazil. A beautiful jadeite statuette, about five ROCKS...number of different funds. A beautiful, light blue topaz of 490 carats from Ceylon was acquired with the...of pink and blue tourmaline from Tiofilo Otoni, Brazil, with the Bruce fund; and a large morganite from...The gift of a large rhodochrosite stalactite from Minas Capillitas, Catamarca, Argentina, was received from |  | | 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 |  | | Journal (issue) | | mine, Colombia. Top right: Topaz, 8.4 cm, from Ouro Preto, Minas Gerais, Brazil. Lower left: Phosphophyllite...Andrea Bartorelli: Minerals and Precious Stones of Brazil. Other important references (if any) for individual...da Cabeca mine, Parelhas, Rio Grande do Norte, Brazil. Will Johnson collection (I had to buy many unwanted...Morganite beryl, 7.5 cm, from near Araçuai, Minas Gerais, Brazil. The find predates the discovery of morganite...to get this specimen, a complete floater, for my Brazil collection); Tom Spann photo. Reference: Cassedanne |  | Gauzzi, Teodoro, Graça, Leonardo Martins, Lagoeiro, Leonardo, de Castro Mendes, Isolda, Queiroga, Gláucia Nascimento (2018) The fingerprint of imperial topaz from Ouro Preto region (Minas Gerais state, Brazil) based on cathodoluminescence properties and composition. Mineralogical Magazine, 82 (4) 943-960 doi:10.1180/minmag.2017.081.078 | Journal (article/letter/editorial) | | fingerprint of imperial topaz from Ouro Preto 2 region (Minas Gerais state, Brazil) based on 3 cathodoluminescence...Mendes2, Gláucia Nascimento Queiroga1 8 1 9 Brazil ub lis he d Department of Geology, Federal University...Preto, Ouro Preto, MG 35400-000, 10 2 11 901, Brazil 12 3 14 ABSTRACT Pr 15 Department of Geology...PR 81531-980, Brazil ep 13 Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte...properties of imperial topaz from Ouro 16 Preto region (Minas Gerais state, Brazil) and its relation with |  | | Journal (article/letter/editorial) | | 1967 in the Pioneira mine, Teofilo Otoni, Minas Gerais, Brazil. Downloaded by [Stockholm University Library]...de Salinas mine, Aracuai-Itinga district, Minas Gerais, Brazil. Although the owner did not wish to sell...specializing in colored gemstones. Keith's travels in Brazil in search of gems and crystal specimens have added...gemmy red tour malines from the Jonas mine in Brazil have sold for several hundred thousand dollars...from the Jonas pocket was said to have sold in Brazil in 1982 for close to $5 mil lion. This is in addition |  | | Journal (issue) | | left) Elbaite, 4.5 cm, Sapo mine, Goiabeira, Minas Gerais, Brazil; Gus Eitler collection; Joe Budd photo.... Kunzite spodumene, 11 cm, Urucum mine, Minas Gerais, Brazil. Ex Steve SmaJe collection. Joe Budd photo...albite, 12 cm, Telirio mine near Linopolis, Minas Gerais, Brazil. Joe Budd photo. Gold, 8 cm, St. Johns,...cm, Pederneira mine, Sao Jose da Safira, Minas Gerais, Brazil. Joe Budd photo. Pyromorphite, 12 cm, Daoping...mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil. Joe Budd photo. 12 Supplement to The |  | | Report (issue) | | No. 14: Topaz Perfect Cleavage ISBN 978-0-9790998-9-2 Publisher Lithographie, LLC Denver, Colorado...Photo Credits Cover: Topaz, 3.5 cm tall Capao Mine, Ouro Preto, Minas Gerais, Brazil Max and Jon Sigerman...Sigerman collection Robert Weldon photo Above: Topaz, 5.5 cm tall El Chalten, Santa Cruz, Argentina Scott Rudolph...brooch/pendant is set with topaz from three different localities. Two Brazilian "Imperial" topaz gems make up the...the wings, totaling 19.59 carats, are light blue topaz. The wing tips are set with melee diamonds. The |  | | Journal (article/letter/editorial) | | JanuarylFebruary: Tourmaline on quartz, Cruzeiro mine, Minas Gerais, Brazil. Los Angeles County Museum of Natural History...Colorado, 337, 382 Actinolite, Bahia, Brazil, 36 Agardite-(Y), Bahia, Brazil, 38 Agate, 259-67 Aikinite, Colorado...Albite. Maine, 4 12 Alexandrite, Hematitia, Minas Gerais, Brazil, 23 Almandine, Maine, 412 Alunite, Utah...225 Anatase, Bahia, Brazil, 3.5 Andalusite, Michigan, 96 Anhydrite, Bahia, Brazil, 39; Colorado, 397;...Bahia, Brazil, 38; Madagascar, 256; Michigan, 96; Ohio, 255 Aquamarine, Minas Gerais, Brazil, 19, 25 |  | | Report (issue) | | GEOLOGICAL SURVEY Revised heat capacity values for topaz and stauroliti based upon a better analysis of the...presented for topaz, staurolite and annite. New heat capacity measurements are reported for topaz for the temperature...capacities of topaz above about 800 K were resolved. The specific heat (J-g'^K" 1 ) of topaz in the temperature...Calculated thermodynamic properties of staurolite and topaz are dependent upon accurate information regarding...of the samples measured. For a recent study of topaz (Kirby et al., 1990), it was noted that a recent |  | | Journal (issue) | | 3 FEATURE ARTICLES Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Araquai Districts...NOTES * AND NEW TECHNIQUES Altering the Color of Topaz Kurt Nassau 35 A Preliminary Report on the New...tourlnaline thon anywhere else in the world-Minos Gerais, Brazil; the other with (I new locality for red tourmaline-Zcrmbia...thousand miles south, to the "Gem Pegmatites of Minas Gerais." THe first in a series (which Cdntinues in...important producers of fine aquamarine, tourmaline, and topaz in the world today. With the award for third place |  | | 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...of the aquamarine and most of the tourmaW l ine, topaz, kunzite, morganite, and many other gem materials...gem pegmatite regions of the 20th century: Minas Gerais, Brazil. With these articles, we hope to take you |  | | Report (issue) | | Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-B...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil By ROBERT F. JOHNSON GEOLOGY AND MINERAL...MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-B Prepared...the Departamento National da Producao Mineral of Brazil under the auspices of the International Cooperation |  | | Report (issue) | | (AOO) TIN RESOURCES OP BRAZIL by Max G. White CONTENTS Page ABSTRACT .......................................... 8 Principal producers of tin in Brazil. .......... 8 Exports, imports and consumption...reserves, and resources potential. ... 14 Minaa Gerais. ....................... 16 Location of deposits...tin resources of Brazil ....... in back Location of tin district in central Bahia, Brazil .* . 21-a TABLES...Resources of Brazil By Max G. White U.S. Geological Survey ABSTRACT c Annual tin production in Brazil, most |  | | Journal (article/letter/editorial) | | Laboratory, Carlsbad, California BRAZIL IMPRESSIONS: I have only been to Brazil twice, but 1 did see a lot...most expensive real estate. While on a tour in Brazil in the early 198Os, our bus was stopped by the...begging everyone’s forgiveness. My second trip to Brazil was in 1987 as a member of the International Gemological...Conference group. I had a wonderful time on both trips. Brazil is a beautiful country, one full of contrasts....Fallbrook, California FIRST TRIP TO BRAZIL: I have a number of memories of Brazil, but perhaps the most vivid |  | | Journal (issue) | | much from Sri Lanka, Australia and Colombia and Brazil, but what impressed me most was the extent of the...the A ir-Boundary Refractometer r oems Amethyst Topaz Chrysoberyl Synthetic ruby YAG Zircon Cubic zirconia...reminiscence of a specific find of gem crystals in Minas Gerais in 1947 and their subsequent use in part by...Gemmologist, 13,8,285-7,1978. This is the 'slippery topaz' of Church brought up to date. Diamond is said to...some spinel, sphene and titanite, but not much. Topaz is found in its colourless and yellow variety. Tremolite |  | | Journal (issue) | | collection, page 105; Brown Topaz- Barry and Beth Kitt collection, page 150; Blue Topaz-Lyda Hili collection...in cavities in the limestone of the creek bed. Topaz In 1904, between the small central Texas towns of..."heavy quartz" in a stream bed. lt proved to be topaz from a Precambrian pegmatite cutting coarse-grained...thereabouts, known geologically as the Llano Uplift. Fine topaz crystals continued to come from the area for most...many from fee-collecting arrangements in surficial topaz "fields"; the crystals Supplement to The Mineralogical |  | | Journal (issue) | | China. Wally Mann collection; Joe Budd photo. Topaz, 2.6 cm, from Katlang, Mardan Dist., Khyber Pakhtunkhwa...kunzite), 9 cm, from the Urucum mine, Galiléia, Minas Gerais, Brazil. Gus & Jane Eifler collection; Holly Smith...Record, November–December, 2020 Kevin Brown Topaz with feldspar on smoky quartz, 10.1 cm, from the...& Diane Brownlee Topaz, 15 cm, from Hematita, Antonio Dias, Minas Gerais, Brazil. Tom Spann photo. ...Aquamarine, 9 cm, from Corrego São Francisco, Minas Gerais, Brazil. Tom Spann photo. Rhodochrosite on manganite |  | | Journal (article/letter/editorial) | | mystical source of exceptionul specitiiens-Minus Gerais. So muny ditverenl things hud coiiie from this...then I huve hud the opportunity to visit Minus Gerais six times und ulso the greut pleusure of yetting...1986: Maklng Connections Hyman had already been to Brazil three times and had made several good contacts...the third largest city in Brazil and the capital of the state of Minas Gerais. In Belo we were happy to...from the San Diego area who made frequent trips to Brazil. He knew the dealers, he knew the gems, and he |  | | Journal (issue) | | 86 Chips from the Quarry Connoisseur's Choice: Topaz from Granite Pegmatites, Limoeiro Mine, Virgem da...da Lapa, Ara~uaf Pegmatite District, . Minas Gerais, Brazil, Michael A. Menzies Signature Specimen: Elbaite...Elbaite from the Cruzeiro Pegmatite, Minas Gerais, Brazil: At the Natural History Museum of Los Angeles...99 Coming Events Topaz, p. 36 Signature specimen, p. 86 ABOUT THE COVER: Topaz with lepidolite, a/bite...mine, Virgem da Lapa, Ara<;uar district, Minas Gerais, Brazil; private collection, Jeff Scovil photo. |
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Ouro Preto, Minas Gerais, Brazil