Ries, G., Menckhoff, K. (2008) Lösung und Neuwachstum auf Quarzkörnern eiszeitlicher Sande aus dem Hamburger Raum. 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. Rykart, R. (1995) Quarz-Monographie - Die Eigenheiten von Bergkristall, Rauchquarz, Amethyst, Chalcedon, Achat, Opal und anderen Varietäten. A microgranular or microfibrous form of chalcedony coloured in various shades of green by disseminated silicate particles (variously attributed to. Journal of Physics and Chemistry of Solids: 31: 575-596. The twist reflects the handedness of the quartz crystals. A translucent, moss green variety of chalcedony. (1984) Thermal release of water from natural quartz. Bates, J.B., Quist, A.S. (1972) Polarized Raman spectra of β-quartz. Firket, A. Van Praagh, G., Willis, B.T.M. With increasing distance from the base. (1982) The investigation of defects in shock-metamorphosed quartz. Soviet Physics - Doklady: 34: 484-485. Ballman, A.A. (1961) Growth and properties of colored quartz. Lin, X., Heaney, P.J. [Clark, 1993 - "Hey's Mineral Index"], In correct usage, the name refers to a (usually) black and white. Université de Nancy. The Canadian Mineralogist 11, 263-271. Escuela Técnica Superior de Ingenieros de Minas de Madrid. (editor) Silica in Sediments. Crystal-like stones found in Mon district likely to be Quartz: DC. Gems & Gemology: 53: 68-81. : 62: 443; King, V. and Foord, E., 1994, Mineralogy of Maine. Calvo, M. (2016). Special Report Series. Scepter quartzes are crystals in which a second generation crystal tip grew on top of another quartz crystal. Plötze, M., Wolf, D., Krbetschek, M.R. Thomas, L.A. (1945) Terminology of interpenetrating twins in α-quartz. Greyish agate with patches of blurry, foggy inclusions. Enami, M., Nishiyama, T., Mouri, T. (2007) Laser Raman microspectrometry of metamorphic quartz: a simple method for comparison of metamorphic pressures. Memorie della R. Accademia delle Scienze dell'Istituto di Bologna, serie 3, 5, 105-222; De Michele, V. (1974) Guida mineralogica d'Italia. 45, 443-447. ; Garabedian, James A. 3d models and HTML5 code kindly provided by. Geochemical Journal: 48(2): 189-205. Geochimica et Cosmochimica Acta: 10: 1-26. de Vries, A. in: Heaney, P.J., Gibbs, G.V., editors. Agate with sharp-angled bands which resemble the outlines of fortifications of a castle. Mineralien-Welt, 17, 2, 58-66. California Division of Mines and Geology Mineral Information Service: 22: 35-38. Ramseyer, K., Baumann, J., Matter, A., Mullis, J. Springer Verlag, 71-118. Taddei, C. (1937) Dalle Lepontine al Ceneri. Stevens Kalceff, M.A., Phillips, M.R. Physics and Chemistry of Minerals: 8(3): 121-127. (2004) Formation of quartz veins by local dissolution and transport of silica. Baker, G. (1946) Microscopic quartz crystals in brown coal, Victoria. Paragenesi alpine nelle Alpi Apuane: I minerali delle vene di quarzo della Valle dell'Acqua Bianca, Gorfigliano (LU) Riv. Drees, L.R., Wilding, L.P., Smeck, N.E., Senkayi, A.L. Mineralogical Record 28, No. Quartz crystal is found in many countries and many geologic environments. 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. Annalen der Physik und Chemie: 112: 177-192. Similar to Tiger's Eye. Leydolt, F. (1855) Über eine neue Methode, die Structur und Zusammensetzung der Krystalle zu untersuchen, mit besonderer Berücksichtigung der Varietäten des rhomboedrischen Quarzes. Journal of Applied Crystallography 51, 915-918. Journal of Earth Systems Science: 116: 497-510. Seifert, H. (1955) Über orientierte Abscheidungen von Aminosäuren auf Quarz. Memorie della R. Accademia delle Scienze dell'Istituto di Bologna, serie 5, 2, 722-729; Bombicci, L. (1892 b) Sulle modificazioni degli spigoli verticali nei cristalli di quarzo di Carrara e su quelle che strutturalmente vi corrispondono nei cristalli di altre specie minerali. Januzzi, Ronald E. and David Seaman. Baptistae Ferronii, Bononia, page 943; Targioni Tazzetti, G. (1779) Relazioni d'alcuni viaggi fatti in diverse parti della Toscana per osservare le produzioni naturali, e gli antichi monumenti di essa. in: Ein nützlich Bergbüchlin: von allen Metallen / als Golt / Silber / Zcyn / Kupferertz / Eisenstein / Bleyertz / und vom Quecksilber, Loersfelt (Erffurd) 25, 38. Bode Verlag GmbH, Haltern. Springer Verlag, 139-159. ; Harold Moritz field observations. Journal of Metamorphic Geology: 4: 237-260. Maschmeyer, D., Lehmann, G. (1983) A trapped-hole center causing rose coloration of natural quartz. Scholz, R., Chaves, M.L.S.C., Krambrock, K., Pinheiro, M.V.B., Barreto, S.B., de Menezes, M.G. For perhaps more than... A green transparent variety of macrocrystalline quartz. (1989) Silica in soils: quartz and disordered silica polymorphs. Choudhury, N., Chaplot, S.L. Sowa, H. (1988) The oxygen packings of low-quartz and ReO3 under high pressure. (1993) Thermoluminescence spectra of igneous quartz and hydrothermal vein quartz. Götze, J., Plötze, M., Fuchs, H., Habermann, D. (2001) Origin, spectral characteristics and practical applications of the cathodoluminescence (CL) of quartz - a review. in: Heaney, P.J., Gibbs, G.V., editors. A yellow to yellow-orange or yellow-green variety of quartz. A locally applied name to clear, colorless quartz beach pebbles occurring along the Delaware Bay beaches of Cape May County, New Jersey, USA. Trade name for a light violet to dark purple chalcedony from Arizona. Cordier, P., Weil, J.A., Howarth, D.F., Doukhan, J.C. (1994) Influence of the (4H)Si defect on dislocation motion in crystalline quartz. Studi Sup. 3rd Symposion of the Hohe Tauern National Park for Research in Protected Areas, 245-249. (2015) Quartz: a bull’s eye on optical activity. Bernhardt, H.-J., Alter, U. Von Goerne, G., Franz, G., Robert, J.L. Calvert, S.E. (1829) Über die herzförmig genannten Zwillingskrystalle von Kalkspath, und gewisse analoge von Quarz. Scott, S.D., O'Connor, T.P. Le Page, Y., Donnay, G. (1976) Refinement of the crystal structure of low-quartz. Haus, R., Prinz, S., Priess, C. (2012) Assessment of high purity quartz resources. European Journal of Mineralogy: 12: 975-986. Frondel, C. (1945) History of the quartz oscillator-plate industry, 1941-1944. Henn, U., Schultz-Guettler, R. (2012) Review of some current coloured quartz varieties. (2017) Causes of iridescence in natural quartz. Vol. Collections of Alfredo Petrov and Dr. Jaroslav Hyrsl. [Discovery of silicon, quartz being made of silicon and oxygen], Arago, F.J.D. Meyer, T. (1888) Action of hydrofluoric acid on a sphere of quartz. (Compare with the more common Chrysoprase variety of chalcedony, which is colored by nickel.) Mineral Society of Great Britain and Ireland. (1927) The properties of silica. (1988) Rapid subsidence and upthrusting in the Northern Apennines, deduced by fluid inclusion studies in quartz crystals from Poretta Terme. ; Orlandi, P., and Criscuolo, A. How are they used? Springer Verlag, 331-355. Chakraborty, D., Lehmann, G. (1976) Distribution of OH in synthetic and natural quartz crystals. Current server date and time: November 29, 2020 05:02:47 Minerales y Minas de España. Zhang, S., Liu, Y. (1975): Über die Mineralkluft im Amphibolit von Burgegg, Steiermark. (1994) Hydrogen speciation and chemical weakening of quartz. in abstracts of the 22nd IMA Meeting Melbourne p 498; Myles M. Felch, William B. Simmons, Alexander U. Falster, and Karen L. Webber (2016) A large scale boundary layer texture in the Mt. (1940) The α-β transition of quartz. When quartz-bearing rocks become weathered and eroded, the grains of resistant quartz are concentrated in the soil, in rivers, and on beaches. ; pg. Varieties colored by trace elements built into the crystal lattice, as opposed to varieties colored by inclusions, generally show dichroism: smoky quartz, amethyst, citrine, prasiolite, "rose quartz in crystals" (a.k.a. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp. Geochichimica et Cosmochimica Acta: 30: 1235-1241. According to Hey's 3rd Ed. (1963) Undulatory extinction in quartz of igneous and metamorphic rocks and its significance in provenance studies of sedimentary rocks.