"Maine Mineral Localites, 3rd Ed." A local name for a brown ferruginous variety of Jasper. Phosphate fractionation in pegmatites of Pedra da Moura II claim–Ponte da Barca–Portugal. Ireland. Frelinger, S.N., Ledvina, M.D., Kyle, J.R., Zhao, D. (2015) Scanning electron microscopy cathodoluminescence of quartz: Principles, techniques and applications in ore geology. in Soil Mineralogy with Environmental Applications, Soil Science Society of America (Madison Wisconsin, USA) 611-636. X-ray and TEM investigations. The Canadian Mineralogist: 38: 233-244. Mitteilungen der Österreichischen Mineralogischen Gesellschaft 165, 99-117. & Baker, W.E. Denning, R.M., Conrad, M.A. Liber V. Typis Io. Editions Minéraux et Fossiles, BRGM. Nature Physical Science: 234: 133-134. Davidson, P.M., Lindsley, D.H. (1989) Thermodynamic analysis of pyroxene-olivine-quartz equilibria in the system CaO-MgO-FeO-SiO2. American Mineralogist: 55: 246-263. Botis, S., Nokhrin, S.M., Pan, Y., Xu, Y., Bonli, T. (2005) Natural radiation-induced damage in quartz. As a mineral name, quartz refers to a specific chemical compound (silicon dioxide, or silica, SiO2), having a specific crystalline form (hexagonal). (1987) High-pressure Raman study of the vibrational modes in AlPO4 and SiO2 (α-quartz). in: Götze, J., Möckel, R., editors. Maschmeyer, D., Lehmann, G. (1983) A trapped-hole center causing rose coloration of natural quartz. Contributions to Mineralogy and Petrology: 18: 295-304. ; Chamberlin, R. T. (1908) The gases in rocks. Physica Status Solidi: 41: 129-137. Nature: 181: 1193. Hyrsl, J., Niedermayr, G. (2003) Magic World: Inclusions in Quartz / Geheimnisvolle Welt: Einschlüsse in Quarz. As a result, a commercial process of manufacturing pure, flawless, electronics-grade quartz was developed. Bombicci, L. (1869) La collezione dei cristalli di quarzo aeroidro di Porretta. (2000) Mineral equilibria in quartz leucoamphibolites (quartz—garnet—plagioclase—hornblende calc-silicates) from southeastern British Columbia, Canada. Fine Quartz crystals can be found throughout the globe. European Journal of Mineralogy: 6: 17-22. Hoffmann, C.A.S. Krauskopf, K.B. ; Mullis, J. The design and re-launch of the new MEC website is madepossible by a generous contribution from Newmont Mining, The SciFest All Access virtual science festival will offer engaging STEM activities and performances, The design and re-launch of the new MEC website is made. Tasmanian Geological Survey. Jenzsch, G. (1867) Ueber die am Quarze vorkommenden sechs Gesetze regelmäßiger Verwachsung mit gekreuzten Hauptaxen. Physica Status Solidi A: 18: 155-170. Carpenter, M.A., Salje, E.K.H., Gaeme-Barber, A., Wruck, B., Dove, M.T., Knight, K.S. Quartz is usually quite harmless unless broken or powdered. Bull. [Clark, 1993 - "Hey's Mineral Index"], In correct usage, the name refers to a (usually) black and white. Gautier, J.-M., Schott, J., Oelkers, E.H. (1998) An experimental study of quartz precipitation and dissolution rates at 200°C. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp. Stevens Kalceff, M.A., Phillips, M.R. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Physics and Chemistry of Minerals: 8: 128-135. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Rocks & Minerals (Connecticut Issue): 70(6): 407. With one or two exceptions the crystal has not been found in place in veins but has been found in the weathered mantle on the farms of the region. In Spanish mineralogical literature, the name is traditionally used exclusively for the red "floater" variety of authigenic quartzes from continental gypsum-bearing marls of the Triassic Keuper formation. Schweizerische mineralogische und petrographische Mitteilungen: 43: 91-103. A naturally cemented matrix of broken agate fragments. Cassa di Risparmio di Carrara - Amilcare Pizzi Editore S.p.A., Milano, 109 pp. American Chemical Society, Monograph No.37, 856pp. Broken crystals and masses may have razor-sharp edges that can easily cut skin and flesh. Trade name for blue quartz or chalcedony. Natural quartz is rarely used as found in nature (especially in electrical applications), except as a gemstone. Very special multicolor black-blue-brown-white local variety of. A microgranular or microfibrous form of chalcedony coloured in various shades of green by disseminated silicate particles (variously attributed to. (1872-73) Mineralogia della Toscana. Two varieties of quartz are commonly called "rose quartz". The Mineralogical Magazine and Journal of the Mineralogical Society: 8: 1-10. Soviet Physics - Doklady: 34: 484-485. Minerales y Minas de España. in Minerals in Soil Environments, Editor S.B. pink quartz), are pleochroic. The sparkling stones that triggered a ‘diamond’ rush in Nagaland’s Mon district in the last few days could be quartz, a preliminary finding by a team of geologists has revealed. Bloss, F.D., Gibbs, G.V. Rocks & Min. Journal of Earth Systems Science: 116: 497-510. Crystal Research Technology: 19: 453-460. Tarr, W.A., Lonsdale, J.T. (1981) The structure of quartz at 25 and 590°C determined by neutron diffraction. (1994) Structure and chemistry of the low-pressure silica polymorphs. American Mineralogist: 31: 456-461. American Mineralogist: 69: 1078-1081. Scandale, E., Stasi, F., Lucchesi, S., Graziani, G. (1989) Growth marks and genetic conditions in a quartz druse. Zeitschrift für Krystallographie: 53(1): 15-52. (1811) Mémoire sur une modification remarquable qu'éprouvent les rayons lumineux dans leur passage à travers certains corps diaphanes et sur quelques autres nouveaux phénomènes d'optique. Dennen, W.H. Quartzine is a fibrous variety of chalcedony. Scandale, E., Stasi, F., Zarka, A. Go to www.MoveMiningNextGen.org to learn how to make and submit your video! Quartz is one of the most common minerals in the Earth’s crust. Quartz crystals displaying internal spectral colours under minor rhombohedral faces. Heaney, P.J. Frondel, C. (1945) Secondary Dauphiné twinning in quartz. Tuttle, O.F. ; Orlandi, P., and Criscuolo, A. Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms. American Mineralogist: 45: 892-894. Van Goethem, L., Van Landuyt, J., Amelinckx, S. (1977) The α-β transition in amethyst quartz as studied by electron microscopy and diffraction. Rudnick, R.L., Gao, S. (2003) 3.01 Composition of the continental crust. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. (1527) Querz. Hyrsl & Rosales (2003) Mineralogical Record, 34, 241-254.; Econ Geol (1985) 80:416-478. Crystals with a (pseudo)cubic appearance that are dominated by a single rhombohedral form (usually r, { 1 0 -1 1 }). Bambauer, H.U. (1975) Twin laws versus electrical and optical characters in low quartz. (1994) Colored varieties of the silica minerals. Trade name for a light violet to dark purple chalcedony from Arizona. The Mineralogical Press, Danbury, Connecticut. Gambari, L. (1868) Descrizione dei quarzi di Porretta. Glinnemann, J., King, H.E., Schulz, H., Hahn, T., La Placa, S.J., Dacol, F. (1992) Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure. There is an additional prize ($500) for the video that receives the most votes online—the People’s Choice winner. Journal of Physics C: Solid State Physics: 9: 3925-3940. [MinRec 21:533]; Dennis C. Arne, L. W. Curtis, S. A. Kissin (1991) Internal zonation in a carbonate-hosted Zn-Pb-Ag deposit, Nanisivik, Baffin Island, Canada. (1986) A pragmatic model for the simulation of self-induced striations in quartz crystals. Chemical Geology: 103: 85-102. Shape-wise, rock quartz forms crystals in hexagonal prisms with sharp ends of six-sided points looking like little pyramids; however, some quartz embedded in rock has an irregular mass, with no definite shape. Nature: 155: 424. (Compare with the more common Chrysoprase variety of chalcedony, which is colored by nickel.) (2012) Mineralogy, geochemistry and cathodoluminescence of authigenic quartz from different sedimentary rocks. Jenzsch, G. (1868) Ueber die Gesetze regelmäßiger Verwachsung mit gekreuzten Hauptaxen am Quarze. Flörke, O.W., Mielke, H.G., Weichert, J., Kulke, H. (1981) Quartz with rhombohedral cleavage from Madagascar. (2006) Ab initio studies of phonon softening and high-pressure phase transitions of α-quartz SiO2. Proceedings of the Royal Society of London. Lehmann, K., Berger, A., Götte, T., Ramseyer, K., Wiedebeck, M. (2009) Growth related zonations in authigenic and hydrothermal quartz characterized by SIMS, EPMA-, SEM-CL- and SEM-CC-imaging. Bode Verlag GmbH, Haltern. Journal of Applied Crystallography: 18: 275-278. Journal of Geophysical Research: 87(B8): 7073-7078. Greyish agate with patches of blurry, foggy inclusions. With increasing distance from the base. (1990) Kinetics of quartz dissolution in electrolyte solutions using a hydrothermal mixed flow reactor. [, This map shows a selection of localities that have latitude and longitude coordinates recorded. And amethystine coloured chalcedony pebbles ) assessment of high purity quartz resources, N. ( 1978 ): 121-127 snakeskin-like... Economic Paleontologists and Mineralogists, Special Issue 3, 5, 105-222 ’ s crust High-pressure Raman study vein! Elongated and even needle-like first described prior to 1959 ), Image shows birefringence colour! Accademia delle Scienze dell'Istituto di Bologna, serie 2, 9,.... 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