 | | Journal (article/letter/editorial) | | AM., VOL. 57 FIGURE 1. BATATEIRAS, BAHIA Wall rock is sandstone. Note sandstone inclusion in vein....MINAS GERAIS Wall rock is decomposed Bambui shale. FIGURE 2. BATATEIRAS, BAHIA Wall rock is sandstone. ... FIGURE 4. SAO PEDRO MINE, CRISTALINA, GOIAZ Wall rock is sandstone. Photo by E. II. Payne. Fir.uHi-:...MINE, BAIIIA Outcrop Map of Onca-Pacu Crystal Mines Area, Sete Lag6aa, Minaa By H.K-5hearerfQeoloqt3t-...by quartz with terminations of inwardly growing crystal intergrown with those which grow from the opposite |  | | Journal (article/letter/editorial) | | Mineral Society’s 2018 show theme, Crystals and Crystal Forms, we have selected Muzo-habit quartz from...that occurs as colorless anhedral grains in many rock types. Quartz has a Mohs hardness of 7 and is very...trigonal crystal system (or rhombohedral subsystem of the hexagonal crystal system). This crystal class...crystal’s habit—its overall shape—depends on which crystal forms are present and the relative degree of their...that quartz crystals display only three major crystal forms: the hexagonal prism m{100} and the two terminal |  | | 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,...Collins, King’s College London; John L. Emmett, Crystal Chemistry, Brush Prairie, Washington, USA; Emmanuel...as desirable for cutting gemstones, some fine crystal specimens were produced. Some of the Masisi tourmaline...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in |  | | 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 |  | | Journal (issue) | | J a c o b diamond, a treasure of 150 carats, the rock-bottom price of which was about Rs. 150 lakhs. ...the girdle from the crystal growth marks on the side of the " p u l l e d " crystal. R.W. 80 CROWNINGSHIELD...Gemology, 1969, X I I I , 1, 15-21, 16illus. Reports a rock mixture, consisting mostly of opal and grunerite...imitation consisting of a hollow-backed cabochon of rock crystal filled with opal chips which were bonded in...faces. E.S. M A L E S (P. A.). Opal in volcanic rock. Australian Gemmologist, 1968, X , 4, 9-11. T h |  | | Catalog/List | | Micromount and Fluorescent columns . PETROLOGIC (ROCK) SPECIMENS ....... MINERAL DETERMINATION SUPPLIES...SUPPLIES including Blowpipe Testing.......... . xl - crystal xlled - crystalled xlline - crystalline xllized...County, Arizona. Sharp hexagonal barrel-shaped crystal druse. Many of the crystals exhibit a cavernous·...mina Ojuela. White-to-pale yellow sheave-like crystal FI. 1. 00 groups on limonite ................ Mexico...of Huesca, Estopinian. �ue mass in ancient trap rock, rare ...... AFWILLITE Hydrous calcium hydroxy-silicate |  | | Journal (issue) | | barbosalite from Lavra do Criminoso, Minas Gerais, Brazil ..............................................147...mine near Magdalena, Sonora, Mexico. The large crystal is 28 mm across. Collection of Gerhard Becker;...Mineral Society for making the hall avail able to us; Rock Currier for his interesting lecture which led off...Mineral Co. (Casa Grande, AZ) Tony Jones, Calif. Rock and Mineral (Temple City, CA) Joseph Kielbaso (Tipp...Enchanted Mesa Minerals (Belen, NM) Paul Otto, Crystal Showcase (Albuquerque, NM) Pala Properties International |  | | Book | | several tons each are known from pegmatites in Brazil and Madagascar as weil as from Alpine type veins...in crystallised quartz varieties such as reck crystaL smoky quartz, amethyst, etc. beim Erkennen und...dispersed on our planet and particularly deposits in Brazil and Madagascar are famous and researched in detail;...thus quartz with characteristic inclusions. l n Brazil quartz veins and Alpine type veins are particularly...cm. Above. Unknown white fibres in quartz from Brazil. Height 4.5 cm. Oben links. Arsenopyrit im Quarz |  | | Journal (issue) | | VOLUME 22 NUMBER SIX APRIL 1991 Cover Picture A crystal of emerald on calcite from Muzo, Colombia, from...Dr Campbell Smith on curatorial duties with the rock collections and continued his studies of Scottish...discovery of another new mineral, painite, found as a crystal by A.CD. Pain at Mogok in Burma and named in his...6 1991,22, 6 334 Gem thaumasite from the Black Rock Mine, South South Mrica Africa Ulrich Henn, Markus...growth-zoning growth-zoning in in a Black Black Rock Rock thaumasite. xlO. Fig. 3. 3. Distinct Distinct |  | | Book | | take the collector or fossicker to the sites of crystal occurrences. Such detailed guidance is not possible...Occurrence: The Americas 63 USA 64 Mexico 72 Panama 75 Brazil 75 Canada 80 7 Occurrence: Rest of the world 81...QUARTZ Varieties Habit Pleochroism Occurrence Rock crystal (colourless), amethyst (violet-purple), citrine...quartzite (a whitish rock, fine-grained, opaque). Single crystal specimens of rock crystal, amethyst, citrine...in amethyst (blue, reddish-violet). In almost all rock types and in most countries. CHALCEDONY Agate (light |  | | Catalog/List | | Micromount and Fluorescent columns. PETROLOGIC (ROCK) SPECIMENS .... MINERAL DETERMINATION SUPPLIES including...PHOTOGRAPH: 67 69 70 l\ilICROMOUNT SUPPLIES . xl - crystal xlled - crystalled xlline - crystalline xllized...ATLASES ...... . 79 Sharp hexagonal barrel-shaped crystal druse. Many oi the crystals exhibit a cavernous...mina Ojuela. White-to-pale yellow sheave-like crystal groups on limonite . .. . .. ... .. ... . lVlexico...of Huesca, Estopinian. �ue mass in ancient trap rock; resembles lapis, rare ... ......... ....... 3 |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...EDITING Courtesy of Ian McReath Spine photograph: Crystal of multicolored tourmaline (84 x 26 mm), Lavra...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 | | t::_: •.·'':{}j;,·}~t' MM - T 'N Fl. P. R. - crystal crystalled crystalline crystallized micromount...Mountains, Marysvale ----i'>ink crystalline mass, some crystal vugs ALTAITE Lead telluride Colorado Saguache County... AMBLYGONITE Sodium lithium aluminum phosphate Brazil Minas Gerais, Governador Valaderas Single pale... Norway Kragerp Pure dark green cleavages and crystal sections .. Norway Kragerp ~JJ laq? lustrous dark...Island of Linosa --Lustrous black rectangular crystal sections : 'I to ~II $, 25, 5/ $1. 00, • • • • |  | | Journal (issue) | | OCTOBER 1991 Cover Picture Cross section of ruby crystal with massive rutile inclusion. (Plate 5, 'The growth...phenomena. Were it not for fine, parallel acicular crystal inclusions in chrysoberyl, there would be no cat's-eye... the stone could have been a large tourmaline crystal, possibly red in colour and from Burma where in...Swedish like English. "Purple-coloured Mountain Crystal." Robals: rauwa, rawa; granater. "Small transparent...it as 'gröngul', i.e., 'greenish-yellow'. White Crystal: wille palingu, sudu palingu; hvit crystall "Transparent |  | | Report (issue) | | adverb Argentina Arizona Baja California Bolivia Brazil California Central America Chile chemistry Colombia...varies according to country: Argentina Bolivia Brazil Chile Colombia Costa Rica Cuba Curacao Ecuador...Mexico a braza de piedra is defined as a block of rock 2 by 4 by 1 varas in dimensions equivalent to 4.../ifcra varies from country to country: Argentina Brazil Central America Chile Colombia Costa Rica Cuba...3036p. Munoz, Nicholas G., 1988, Dunham's carbonate rock classification: a Spanish terminology: Carbonates | | | Journal (issue) | | barbosalite from Lavra do Criminoso, MinasGerais, Brazil ........................... 147 by P. J. Dunn,...mine near Magdalena, Sonora, Mexico. The large crystal is 28 mm across. Collection of Gerhard Becker;...Mineral Society for making the hall avail able to us; Rock Currier for his interesting lecture which led off...Mineral Co. (Casa Grande, AZ) Tony Jones, Calif. Rock and Mineral (Temple City, CA) Joseph Kielbaso (Tipp...Enchanted Mesa Minerals (Belen, NM) Paul Otto, Crystal Showcase (Albuquerque, NM) Pala Properties International |  | | Journal (issue) | | intrusions, and has been retained within the parent rock beneath an impermeable cover of roof rocks. low...crystals have been found in the eluvial deposits. hard rock mining, but the irregular pattern and distribution...of colour and degree of rounding. The largest crystal in the picture is 19 mm long. nanometres 700 1... They were probably derived from a deep crustal rock that was invaded and shattered by upward-moving...bi-colour sapphires also occur here. The average crystal diameter of these gemstones, recovered by very |  | | Book (volume) | | diffraction of x-rays by crystals. The familiar term “‘crystal clear” ultimately derives from the Greek name crystallos...crystallos, applied to transparent rock-crystal. This term, with its connotation of purity, often has...mentioned. The photograph of the synthetic quartz crystal shown in Fig. 77 is published with the kind permission...Crystallography 36 Axial Ratio and Angle Table, 37 Crystal Habit, 49 Form Frequency, 49 Form Development,...Dauphiné Law, 76 Secondary Dauphiné Twinning, 81 Brazil Law, 87 Combined Law, 90 B. Quartz Twins with Inclined |  | | Book | | MINES AND MINERALS IN BRAZIL --= ··--· ··- ·-·=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr·icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Book | | potential deposits of SiO2 raw materials in Argentina, Brazil, Germany and Norway. The third part of the book...collaboration between scientists from Australia, Brazil, Canada, Germany, Norway, Switzerland and the USA...Color-Enhancing of Gemological Crystalline Quartz in Brazil . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . 6.3.3 Quartz Color-Enhancing in Brazil. . . . . . . . . . . . . . . . . . . . . . 139... . . . . . . . . . . . . . . 11.5 Bulk Single Crystal a-SiO2 (Quartz) . . . . . . . . . . . 11.6 Bulk |  | | Book | | vugs of crystalline talc. Easily the best extant crystal, a doubly terminated floater found in a talc vug...Shelley Lambert extracted excellent loose ilmenite crystal clusters from a calcite vein-dike digging site...Chamberlain, 1982; Joyce, 2006a). Some of the ilmenite crystal faces are partly overgrown by a brown coating which...and is by far the largest known single ilmenite crystal from any locality worldwide. The crystals are blue-black...LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized minerals in the unusual rock called |  | | Book (edition) | | Nitrates and Nitrogenous Compounds. Phosphate Rock. By Cuester A. FULTON Rorasi By -HOWARD NL ORTH...BURGESS) aie hor, ener 756 reels ae Quartz Crystal) By ROBERT B.. NI@CORMIGE ge15 cet Refractories...mineral hardness of pure crystal almandite garnet is about 7.5 but if the crystal is crossed by incipient...mineral abrasive for this use might be a mineral or rock between 3 and 5 in hardness occurring in abundance...of South Africa supply most of the remainder. Brazil, which once was an important producer, in 1945 |  | | Book | | and Dolomite; Ill. THE INDUSTRIAL Phosphate Rock; 156 Gypsum; Salt MINERALS 7. Igneous Minerals...Beryl 8. Vein and Replacement Minerals Quartz Crystal; 229 Fluorspar; Barite; Magnesite v 269 vi...given to the uses of limestone, dolomite, phosphate rock, gypsum, and salt. Part III of Bates includes chapters...work of many authors, each writing on an industrial rock or mineral with which he is thoroughly familiar...Keller, clay, Duncan McConnell, clay and phosphate rock; Sieg- fried Muessig, borates; and Thomas D. Murphy |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | on a knowledge of physical properties such as crystal morphology, color, luster, hardness, cleavage,...edition, all of the interfacial angles from the crystal elements were recalculated, the Miller-Bravais...Mineralogy, Natural History Museum, London, England. Rock H. Currier: Jewel Tunnel Imports, Baldwin Park,...Luiz A. D. Menezes: Belo Horizonte, Minas Gerais, Brazil. William C. Metropolis: Mineralogical Museum, Harvard...crystallographic data, including structure crystal crystal and powder diffraction results, the morphology |  | | Book (volume) | | preeminent devoted peripheral the curious other crystal gazing, and culture but which gemstones. are...BRITISH ASSOCIATION FOR THE REPORT FROM THE CEYLON ROCK THE NORTH STAFFORDSHIRE TRANSACTIONS OF THE ORIENTAL...published authors A in RUBENS bibliographical Brazil from published abroad 1983 essay 1504 to before...rare books about Brazil 1900 and works the of Brazilian Independence of Brazil References/ in ... du Cabinet de MtdaiUes... p Paleontology of Brazil , B B Woodward A M & "Second p; Press, 1866 |
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