 | | Journal (article/letter/editorial) | | net Rose (Pink) Quartz Lavra da Pitorra, Laranjeiras, Galiléia Minas Gerais, Brazil T here can be...be multiple reasons for including rose quartz crystals in your collection. One that immediately comes to...remarkable number of specimens “wear” their rose quartz crystals as halos, crowns, overgrowths, sashes...found on larger crystals or masses of smoky, milky, or colorless quartz, some exceeding 30 cm in size. This...intriguing and decidedly unique. Although the rose quartz crystals themselves scarcely reach 3 cm in size |  | Morales, Milton J., Figueiredo e Silva, Rosaline C., Lobato, Lydia M., Gomes, Sylvio D., Gomes, Caio C.C.O., Banks, David A. (2016) Metal source and fluid–rock interaction in the Archean BIF-hosted Lamego gold mineralization: Microthermometric and LA-ICP-MS analyses of fluid inclusions in quartz veins, Rio das Velhas greenstone belt, Brazil. Ore Geology Reviews, 72. 510-531 doi:10.1016/j.oregeorev.2015.08.009 | Journal (article/letter/editorial) | | analyses of fluid inclusions in quartz veins, Rio das Velhas greenstone belt, Brazil Milton J. Morales a,⁎, Rosaline...David A. Banks c a b c Universidade Federal de Minas Gerais, CPMTC-Instituto de Geociências, Av. Presidente...Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG, Brazil AngloGold Ashanti Córrego do Sítio Mineração S/A...S/A, Lamego Mine, Rua Mestre Caetano, Sabará, MG, Brazil School of Earth and Environment, University of...Fluid inclusions LA-ICP-MS Hydrothermal alteration Quartz veins Metamorphic fluids a b s t r a c t The Lamego |  | de Souza Martins, Breno, Lobato, Lydia Maria, Rosière, Carlos Alberto, Hagemann, Steffen G., Santos, João Orestes Schneider, Villanova, Fernando Lucas dos Santos Peixoto, Figueiredo e Silva, Rosaline Cristina, de Ávila Lemos, Lucas Henrique (2016) The Archean BIF-hosted Lamego gold deposit, Rio das Velhas greenstone belt, Quadrilátero Ferrífero: Evidence for Cambrian structural modification of an Archean orogenic gold deposit. Ore Geology Reviews, 72. 963-988 doi:10.1016/j.oregeorev.2015.08.025 | Journal (article/letter/editorial) | | de Minas Gerais, Avenida Antônio Carlos, n.° 6627, Bairro Pampulha, Belo Horizonte, Minas Gerais, CEP...CEP 31270-901, Brazil School of Earth and Environment, The University of Western Australia, 35, Stirling...Sítio Mineração S/A, Mina do Lamego, Sabará, Minas Gerais, Brazil a r t i c l e i n f o Article history:...Cuiabá–Lamego trend, Quadrilátero Ferrífero region, Brazil. Both Archean orogenic gold deposits are situated...controlled by pinch and swell, and locally expressed quartz boudins developed during D1–D2. They have two orthogonal |  | | Book | | ltatiaia, Conseilheiro Pena, Governador Valadares, Brazil (Roger Titeux collection, France) 4 inches. Above:...collection) 6 inches. Right: Rutile in quartz, lbitiara, Bahia, Brazil (Yves Gillet collection, France) 1...2 inches. Preceding pages: A Tourmaline, Minas Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San...case of rhodochrosite. 10 Amazonstone and smoky quartz, Lake George, Park Co., Colorado (Coil family-...levels of artistry with much harder minerals such as quartz, carnelian, lapis-lazuli, etc. Phenicians, Cretans |  | | Journal (issue) | | Spann collection; Tom Spann photo. Fluorite with quartz, 11 cm, from Fujian Province, China. Keith & Diane...Kevorkian collection; Jordan Root photo. Fluorite on quartz, 13 cm, from the Yaogangxian mine, Chenzhou Prefecture...kunzite), 9 cm, from the Urucum mine, Galiléia, Minas Gerais, Brazil. Gus & Jane Eifler collection; Holly Smith...what I found was chert with occasional well-formed quartz crystals. I had an insatiable curiosity to know...my journey through the mineral world collecting quartz in Arkansas. At the same time I collected fluorescent |  | | Catalog/List | | ‘normal’ habit, often in conjunction with euhedral Quartz crystals. The potential for new discoveries and...sideways as well as up. This form is sometimes seen in Quartz, but very rarely in Tourmaline. The rough exterior...matrix and is accompanied by a partially euhedral Smoky Quartz crystal. The Phenakite, measuring 0.9 inches...sub-parallel prisms of a uniform pink with minor smoky coloration on exterior surfaces and terminations...amounts of light pink at the base that picks up a smoky cast and later a few pale green areas at the pyramidal |  | | Journal (issue) | | Top right: Topaz, 8.4 cm, from Ouro Preto, Minas Gerais, Brazil. Lower left: Phosphophyllite, 2 cm, from...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 |  | | Journal (article/letter/editorial) | | SEPTEMBER 1 9 7 7 Smoky, blue, greenish yellow, and other irradiation-related colors in quartz K. NASSAU AND... Almost 4oo specimens of natural and synthetic quartz were ~,-irradiated and then heated. Polarized absorption...usually considered to be the cause of the color in smoky quartz does not correlate with A t and Az, but with...instances) in many specimens of natural and synthetic quartz; the color originates from the tail of a strong...natural and irradiated smoky quartz can be explained by combinations of the smoky (As), blue (A t and Az) |  | | Journal (issue) | | Calcite-Kevin & Mark Brown collection, page 52; Smoky quartz gwindel-Brent Lockhart collection, page 175;...unearthing many fine specimens of gadolinite, smoky quartz, fluorite, feldspar in crystals to five feet...Streeter, R. L. Parker found a piece of "heavy quartz" in a stream bed. lt proved to be topaz from a...medium-violet arnethyst crystal specimens from quartz veins. And textbook-sharp, colorless and transparent...minerals found in Texas. Top row (from left): Smoky quartz, 5.5 cm, from Llano County; Bill Morgenstern |  | | Journal (issue) | | left) Elbaite, 4.5 cm, Sapo mine, Goiabeira, Minas Gerais, Brazil; Gus Eitler collection; Joe Budd photo....photo. (lower left) Amazonite microcline with smoky quartz, 8.5 cm, Tree Root pocket, Two Point claim,... Kunzite spodumene, 11 cm, Urucum mine, Minas Gerais, Brazil. Ex Steve SmaJe collection. Joe Budd photo...2009 7 RICHARDSON BEARD COLLECTION Pyrite on quartz, 11 cm, Spruce Ridge, King County, Washington....Bruce Oreck collection. Joe Budd photo. Pyrite on quartz and siderite, 8 cm, Simplon Tunnel, near Brig, |  | | Book (volume) | | Claim, Wah Wah Mountains, Utah, 4 Bournonite (on Quartz) Yaoganxian Mine, Chen Zhou, Hunan Prov., China... Daye, Hubei Prov., China, 13 Chalcopyrite (on Quartz) Yaoganxian Mine, Chen Zhou, Hunan Prov., China...Carbonia-Iglesias Prov., Sardinia, Italy, 67 (on Quartz) Piaotang Mine, Xihuashan Ore Field, Dayu Co.,... Ganzhou Pref., Jianxi Prov., China, 9 (on Quartz) Shangbao Mine, Leiyang Co., Hunan, China, 6 Garnet...Potash Mine, Carlsbad, New Mexico, 8 Helvite (on Quartz) Huanggang Mine, Keshiketeng Co., Chifeng Prefecture |  | | Journal (issue) | | Magdalensburg (Carinthia, Austria), where a series of quartz crystals were found at a settlement that can be...(Lombardy, northem Italy), a transparent and perfect quartz crystaldoubly terminated and about 2.5 cm in diameter-was...foothills of the Lombardy Alps (Pezzotta, 1999), where quartz occurs in a deposit very similar to that of the...the Sicilian sulfur deposits; so-called "fenster quartz" of Porretta Terme; gypsum and other minerals of...Valley and the Siusi Alp; druses of orthoclase and quartz with associated minerals from the pegmatite geodes |  | | Book | | Einschlüsse im Quarz Magie World: lnclusions in Quartz Vorwort Foreword Einführung 7 8 1ntrod...Sulfates, Wolframates Carbonates Silicates Synthetic quartz Final comments Acknowledgements References Photo...only represent a small and limited selection of quartz inclusions and should encourage the readers to...venture on their own journey into the magic world of quartz inclusions, maybe discovering a new, fantastic...aber auch wunderschöne crystals in pegmatites, quartz Kristalle in Pegmatiten, Quarzveins, ore deposits |  | | Journal (article/letter/editorial) | | vein. FIGURE 3. GARGAS MINE, NEAR COKINTO, MINAS GERAIS Wall rock is decomposed Bambui shale. FIGURE...Payne. Fir.uHi-: 5. Juiz MINE, FAZHNDA CAPAO, MINAS GERAIS Pile of well-formed, but milky, crystals from...VOL. 57 JOHNSTON AND BUTLER, PL, 2 FIGURE 1. QUARTZ MASS WITHIN PIPE Note comb structures in pillar...pillar between workmen. iUitE 2. POCKET OF COMB QUARTZ In sandstone at edge of pipe. ALF.GKK MINE, BAIIIA...map of the On^a-Pacti area, Sete Lagdas, Minos Gerais After H. K. Shearer. 617 TYPES OF DEPOSITS |  | | 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 |  | | Journal (article/letter/editorial) | | apatite, albite, muscovite, potassic feldspar, and quartz in the former, and bixbyite, topaz, sanidine, and...massive spessartine and relatively small crystals in quartz matrix occur at Jail Hill near Haddam, Connecticut...single spessartine crystal from Del Norte, Paraíba, Brazil. Bill Larson specimen. Jeff Scovil photo. Manganese...occurs just east of the main cut at the Scott Rose Quartz mine southeast of Custer. Roberts and Rapp (1965)...attractive 3-cm spessartine crystal from Minas Gerais, Brazil. Andy Seibel specimen, Jeff Scovil photo |  | | Report (issue) | | Topaz, 3.5 cm tall Capao Mine, Ouro Preto, Minas Gerais, Brazil Max and Jon Sigerman collection Robert Weldon...Zimbabwe Blue Topaz: St. Anne's Mine JAN KANIS 60. Brazil: The Land of Topaz DIETMAR SCHWARZ 68. Topaz from...locality in Brazil (Sinkankas, 1981). Two gemmy crystals from the Te6filo Ot6ni region in Minas Gerais, Brazil...the term "topaz" in reference to the olivines, quartz, and other Topaz crystals can be extraordinarily...three huge specimens from Te6filo Ot6ni, Minas Gerais, Brazil, that are housed at the Smithsonian Institution |  | | Journal (article/letter/editorial) | | Pennsylvania 17363 john@jwkustos.com Figure 1. Smoky quartz gwindel, 12.2 cm, from the Mont Blanc massif...are characterized by being flattened, are usually smoky in color, and appear to be twisted about a vertical...reason they are commonly referred to as twisted quartz. The name gwindel is an obscure German word for...but it is lacking in the stouter and far tougher quartz crystal. Figure 4. Schorl crystal, 6.5 cm long...specimen and photo. Of particular interest to me are quartz crystals that are bent. My interest in these came |  | | Journal (article/letter/editorial) | | curators share their tales of obtaining specimens in Brazil. *7CLh Downloaded by ["Queen's University Libraries...this field was Allan Caplan, who first went to Brazil by boat in 1938. His experiences there and the... Jack Lowell. 50 ROCKB 6 MINERALS arrived in Brazil for a two-month buying hip based in Governador...windshield, which often happens on gravel roads in Minas Gerais. Arthur E. Smith, a consulting editor of Rocks...Morganite, 10.5 cm tall, Cdrrego do Urucum, Minas Gerais. F. John Barlow specimen, Harold and Erica Van |  | | Journal (article/letter/editorial) | | FEATURED MINERAL AT THE 1987 TUCSON SHOW UBIQUITOUS QUARTZ R O B E R T W. J O N E S 3520 N . Rose Circle Drive...prevalence in so many environments, it can be Figure 1: Quartz from Madagascar. Tom McKee specimen; Robert Jones...fine quartz crystals, specimens and gems. Many of the more spectacular specimens will be quartz upon...gold. A n d the lapidary would be lost without quartz, both as a medium for practice while learning and...to show the importance of quartz, look at its impact on science. It was quartz that Nicolaus Steno studied |  | Ribeiro, Yuri, Figueiredo e Silva, Rosaline C., Lobato, Lydia M., Lima, Luiz Claudio, Rios, Francisco J., Hagemann, Steffen G., Cliff, John (2015) Fluid inclusion and sulfur and oxygen isotope studies on quartz-carbonate-sulfide veins of the Carvoaria Velha deposit, Córrego do Sítio gold lineament, Quadrilátero Ferrífero, Minas Gerais, Brazil. Ore Geology Reviews, 67. 11-33 doi:10.1016/j.oregeorev.2014.10.032 | Journal (article/letter/editorial) | | inclusion and sulfur and oxygen isotope studies on quartz-carbonate-sulfide veins of the Carvoaria Velha deposit...gold lineament, Quadrilátero Ferrífero, Minas Gerais, Brazil Yuri Ribeiro a, Rosaline C. Figueiredo e...Hagemann d, John Cliff d a Universidade Federal de Minas Gerais, CPMTC-Instituto de Geociências, Av. Presidente...– MG, Brazil Aurizona Mineração: Avenida dos Holandeses, Ponta do Farol, São Luís – MA, Brazil c Centro...sequence. All these rocks exhibit alteration to quartz, carbonate and sericite, besides sulfides and sulfosalts |  | | Book | | kunzite, spodumenc and citrine. Page 5: Left: Quartz (Variety Amethyst); Hopkinton, Rhode Island; Scepter...aquamarine, morgan ite, chrysoberyl, peridot, smoky quartz, citrine, calcite, rbodochrosite, and fluorite...latter; an example is he1natite on quartz. Hen1alite " with" quartz indicates adjacent crystals of the...the two species. Hematite "in" quartz signifies that the qt1artz encapsulates the hematite crystal or crystals...beginning, and most of the rock-forming n1inerals (quartz, feldspars, pyroxenes) at the end, but ultimately |  | | 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 |  | | Catalog/List | | 8. SMOKY QUARTZ (8cm x 8cm x 2cm) Macaco Mine, Sao Geraldo Do Baixio, Minas Gerai·s, Brazil A highly...highly unusual, tabular smoky quartz crystal forming a 'square' looking crystal aggregate with only very...liroconite crystals to 5mm infilling a gossanous quartz matrix. (Rich Example) £185 10. CASSITERITE AND...ON MUSCOVITE (4cm x 2cm x 4cm) Golconda, Minas Gerais, Brazil A very pretty specimen with lustrous deep...TOURMALINE (5cm x 1cm x 2cm) Pederneiras Mine, Minas Gerais, Brazil An unusual example with two intergrown dark |  | Nunes, E. H., Melo, V., Lameiras, F., Liz, O., Pinheiro, A., Machado, G., Vasconcelos, W. (2009) Determination of the potential for extrinsic color development in natural colorless quartz. American Mineralogist, 94 (7) 935-941 doi:10.2138/am.2009.3043 | Journal (article/letter/editorial) | | extrinsic color development in natural colorless quartz Eduardo HEnriquE nunEs,1 Valéria MElo,1 FErnando...Belo Horizonte, Minas Gerais 31270-901, Brazil 2 Universidade Federal de Minas Gerais, Departamento de...Belo Horizonte, Minas Gerais 30160-030, Brazil 1 abstract Colorless natural quartz can develop many...sodium. The infrared spectrum of colorless natural quartz is correlated to the development of these colors...are caused by displacements of electrons in the quartz lattice and can be bleached by ultraviolet irradiation |
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Minas Gerais, Brazil