 | | 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) | | 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 |  | | 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 |  | | 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 |  | | 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 |  | | Journal (issue) | | Anderson (1964) noted that the breakdown of the crystal structure can be clearly followed by the gradual...absorptions at 434, 386, and 318cm 1 represent crystal lattice vibration while those at 980 and 902cm...(Figure 2). This was attributed attributed to crystal lattice effects resulting from enhanced orderabsorption...83.8% probability match for Fig. 4. Distorted crystal of ferrian spinel in highly fractured blue zircon...are quite different in visual appearance in both crystal habit and colour. Type 1 (Figure 3) has an elongated |  | | Book | | information b Book review c Crystal morphology information d Crystal drawing ff Continues on following...ALSTONITE An occurrence of alstonite at Cave-in-Rock, Illinois (by G. R. Rossman & R. L. Squires) 5:266-269...crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto) 22: 183-185 ALTO...Burian goyazite from [Alto Bernardino, Paraiba,] Brazil (by J. S. White, Jr.) 12:379 ALUMOHYDROCALCITE...muscovite from the Ze Pinto prospect, Minas Gerais, Brazil 21:405-408 --with J.P. Cassedanne: Crystallized |  | 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 |
|
