 | | Journal (article/letter/editorial) | | Anisotropic Pyrope Garnet That Contains Two Cubic Phases Sytle M. Antao Department of Geoscience, University...crystal structure of two different samples of pyrope garnet, ideally Mg3Al2Si3O12, from South Africa was refined...refined using the Rietveld method, space group Ia3d, and monochromatic synchrotron high-resolution powder...diffraction (HRPXRD) data. Sample 1 from Wesselton Mine is a single cubic phase and is optically isotropic... and Si-O = 1.6343(3) Å. Sample 2 from De Beers Diamond Mine has an average composition {Mg2.33Fe2+ 0 |  | | Journal (article/letter/editorial) | | intergrown in a birefringent andradite-grossular garnet and their implications Sytle M. Antao Received:...2013 Abstract The crystal chemistry across the garnet series is examined, and several systematic trends...was and refined by the Rietveld method, space group Ia3d; monochromatic synchrotron high-resolution...isotropic, single-phase, grossular– S. M. Antao (&) Department of Geoscience, University of Calgary, Calgary...1N4, Canada e-mail: antao@ucalgary.ca andradite garnet (Grs76Adr21) are also presented. The strain in |  | | Book | | authoring Boletfn numeros 40 and 41 (Instituto Geol6gico de Mexico, 1922, 1923), has an author been able to provide...It is the hope and wish of the Sociedad Mexicana de Mineralogia, which promotes the study of Mexican...subject. Miguel Romero PhD President Sociedad Mexicana de Mineralogfa Tehucican, Puebla PREFACE This book...arose only after the establishment of the Colegio de Mineria /College of Mining) in Mexico City on January...extracted from them. Fausto de Elhuyar ( 1755-1833), the first director of Colegio de Mineria appointed the | | | Book | | Boletin nuimeros 40 and 41 (Instituto Geoldgico de México, 1922, 1923), has an author been able...It is the hope and wish of the Sociedad Mexicana de Mineralogia, which promotes the study of Mexican...subject. Miguel Romero PhD President Sociedad Mexicana de Mineralogia Tehuacan, Puebla PREFACE This book...arose only after the establishment of the Colegio de Mineria (College of Mining) in México City on January...extracted from them. Fausto de Elhuyar (1755-1833), the first director of Colegio de Mineria appointed the |  | Mulligan, Suzanne R., Stavrou, Elissaios, Chariton, Stella, Tschauner, Oliver, Salamat, Ashkan, Wells, Michael L., Smith, Alexander G., Hoisch, Thomas D., Prakapenka, Vitali (2021) Equation of State for Natural Almandine, Spessartine, Pyrope Garnet: Implications for Quartz-In-Garnet Elastic Geobarometry. Minerals, 11 (5) 458 doi:10.3390/min11050458 | Journal (article/letter/editorial) | | Almandine, Spessartine, Pyrope Garnet: Implications for Quartz-In-Garnet Elastic Geobarometry Suzanne R...Almandine, Spessartine, Pyrope Garnet: Implications for Quartz-In-Garnet Elastic Geobarometry. Minerals...CA 94550, USA; elissaios.stavrou@gtiit.edu.cn Department of Geoscience, University of Nevada, Las Vegas...Technology, 241 Daxue Road, Jinping District, Shantou 515063, China Department of Materials Science and Engineering...edu (S.C.); prakapenka@cars.uchicago.edu (V.P.) Department of Physics and Astronomy, University of Nevada |  | | Journal (article/letter/editorial) | | pseudomorphous, rhombic dodecahedra, probably after garnet. Acrystal of sp. gr. = 3,203 was found to consist...trace 3.14 99.SO 2.54 Staurolite is of a rich garnet-red and perfectly transparent; sp. gr. = 3.80....alteration products of the tysonite. Ce,O,. La group. F. COP I. 42.89 39.31 28.71 0.53 11. 37.71 36...appears t o be thoria. The metals of the lanthanum group have the at, wt. = 139.7 (anal. I ) and 141 (anal...(anal. I I ) ; traces of oxides of the yttrium group may also be present. These analyses establish the formulz |  | Fan, Dawei, Kuang, Yunqian, Xu, Jingui, Li, Bo, Zhou, Wenge, Xie, Hongsen (2017) Thermoelastic properties of grossular–andradite solid solution at high pressures and temperatures. Physics and Chemistry of Minerals, 44 (2) 137-147 doi:10.1007/s00269-016-0843-4 | Journal (article/letter/editorial) | | grossular (Grs)–andradite (And) solid-solution garnet sample have been measured at high temperature up...bulk modulus and Grs mole fraction (XGrs) in this garnet join is derived to be K0 (GPa) = (163.7 ± 0.7)...Sciences, Beijing 100049, China Introduction Silicate garnet is one of the important silicate mineral groups...igneous rocks, as well as in the upper mantle in garnet peridotites and eclogites (e.g., Akaogi and Akimoto...Stixrude 1992; Dymshits et al. 2014). Silicate garnet is also an important component of subducted oceanic |  | | Book | | 22:65-69 [Abstracts of the] FM-TGMS-MSA Symposium on Garnet (chairman: K. J. Wenrich) 24:61-68 Abstracts of...On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE...Allgood, C. Williams: Ramsdellite from the Mistake mine [Arizona] 14:333-335 ALLGOOD, ROBERT W. -with G |  | | Book (edition) | | along with some new varieties, such as malaya garnet. Previously unknown localities have yielded large...text most used by an increasingly large and active group of gemstone collectors who are fascinated by the...certain colors of garnet are currently selling at prices over $1 ,000 per carat. Garnet has always been... CRYSTAL STRUCTURES AND PROPERTIES types. A group of atoms held together by bonds in such a way form...sodium may amounts! In such cases it member of a group of about eight minerals with essentially the same |  | Grew, E. S., Locock, A. J., Mills, S. J., Galuskina, I. O., Galuskin, E. V., Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist, 98 (4) 785-811 doi:10.2138/am.2013.4201 | Journal (article/letter/editorial) | | 785–811, 2013 IMA Report Nomenclature of the garnet supergroup Edward S. Grew,1,* Andrew J. Locock...University of Maine, Orono, Maine 04469, U.S.A. Department of Earth and Atmospheric Sciences, University...Victoria, Australia 4 Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography,...History, Department of Mineralogy, P.O. Box 50 007, 104 05 Stockholm, Sweden 2 Abstract The garnet supergroup...supergroup includes all minerals isostructural with garnet regardless of what elements occupy the four atomic |  | | Journal (issue) | | 187 Peñas Blancas: An historic Colombian emerald mine R. Ringsrud and E. Boehm 251 Book review 254...Cover Picture: A pair of ancient cameo carvings in garnet. The Hellenistic pyrope-almandine carving on the...the earliest dated extant cameo carvings in gem garnet. On the right is a pyrope cameo of the head of...(Brush Prairie), Dr E. Fritsch (Nantes), R. Galopim de Carvalho (Lisbon), Prof. L.A. Groat (Vancouver),...Colombian emerald mine Ron Ringsrud and Edward Boehm Abstract: The Peñas Blancas emerald mine is part of Colombia’s |  | | Journal (article/letter/editorial) | | Naustdal, Sogn og Fjordane, Norway by R. A. BINNS Department of Geology, University of New England, Armidale...hornblende, formed in equilibrium with the omphacite, garnet, rutile, and apatite, but petrofabric evidence...unaltered eclogites; some are almost monomineralic in garnet, others in omphacite. Most contain less rutile...hornblende with Y = bright green, Z = blue green. Garnet resists alteration until a very advanced stage...foliation. In thin section, euhedral to subhedral garnet grains show dodecahedral faces against other minerals |  | Milani, S., Nestola, F., Alvaro, M., Pasqual, D., Mazzucchelli, M.L., Domeneghetti, M.C., Geiger, C.A. (2015) Diamond–garnet geobarometry: The role of garnet compressibility and expansivity. Lithos, 227. 140-147 doi:10.1016/j.lithos.2015.03.017 | Journal (article/letter/editorial) | | elsevier.com/locate/lithos Diamond–garnet geobarometry: The role of garnet compressibility and expansivity...calculate the entrapment pressures, Pe, for natural garnet inclusions in diamonds at mantle temperatures....present in the same inclusion [e.g. orthopyroxene and garnet (Nickel and Green, 1985), clinopyroxene (Nimis...alternative method has been developed (e.g. Angel et al., 2014a; Angel et al., 2014b; Rosenfeld and Chase, 1961;...inclusion at the conditions of formation and here garnet and olivine are the most abundant occurring inclusion |  | | Journal (article/letter/editorial) | | A Garnet-Hornblende-Pyroxene Rock from Glenelg, Inverness-shire By M. J. O'HARA ABSTRACT A garnet-hornblende-two...that of a picrite-basalt. Comparison with other garnet-pyroxene assemblages suggests that there are no...with a flinty pyritous type of eclogite, in which garnet is scarce, but occurs as relatively large patches...Eskola, 1921, p. 49). No further boulders of the garnet-hornblende pyroxenite have been found on this hillside...—Clinopyroxene, 31 per cent; orthopyroxene, 25 per cent; garnet, 22 per cent; amphibole, 17 per cent; ores, 4 per |  | | Report (issue) | | OFFICE, WASHINGTON 'S : 1974 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary...Marin Peninsula ................................ 25 Angel and Alcatraz Islands and........ 26 Tiburon Peninsula...Francisco ...................................... 34 Angel Island and vicinity.......................35 Origin...Marin Peninsula .................. ............. 49 Angel Island and vicinity ................... 49 San Francisco......................... 2-5. Photographs of: 2. Angel Island, Raccoon Strait, and Tiburon Peninsula.. |  | Milani, Sula, Angel, Ross J., Scandolo, Lorenzo, Mazzucchelli, Mattia L., Ballaran, Tiziana Boffa, Klemme, Stephan, Domeneghetti, Maria C., Miletich, Ronald, Scheidl, Katharina S., Derzsi, Mariana, Tokár, Kamil, Prencipe, Mauro, Alvaro, Matteo, Nestola, Fabrizio (2017) Thermo-elastic behavior of grossular garnet at high pressures and temperatures. American Mineralogist, 102 (4) 851-859 doi:10.2138/am-2017-5855 | Journal (article/letter/editorial) | | 851–859, 2017 Thermo-elastic behavior of grossular garnet at high pressures and temperatures Sula Milani1...Prencipe8, Matteo Alvaro2, and Fabrizio Nestola1 1 Department of Geosciences, University of Padova, Via Gradenigo...Gradenigo, 6, I-35131 Padova, Italy Department of Earth and Environmental Sciences, University of Pavia...Dúbravská cesta 9, 84511 Bratislava, Slovakia 8 Department of Earth Sciences, Via Valperga Caluso 35, I-10125...behavior of synthetic single crystals of grossular garnet (Ca3Al2Si3O12) has been studied in situ as a function |  | | Journal (issue) | | classification system. Jewelry courtesy of Ebert-Richter, Los Angeles, C A , and G. R. Hansen, St. Louis, M O ...-Photographers, Los Angeles, C A . Typesetting for Gems & Gemology i s b y Scientific Composition, Los Angeles...EDITORIAL STAFF Anthony R. Kampf Los Angeles, C A Robert E. Kane Los Angeles, C A John Kolvula Santa Monica...Koivula Kurt Nassau Bernardsville, N/ Glenn Nord Los Angeles, C A Ray Page Santa Monica, C A George Rossman...was shocked to learn that a number of jewelers in Los Angeles had been buying zircons represented as diamonds; |  | | Book (edition) | | ee 496 « eeumeans Witiiitiee. oes. = 498 ee tee de. betcae. tert 499 hee: the tales Beck helaee cs...Corporation Dorothy McGarry University of California, Los Angeles Ann Coppin Chevron Oil Field Research Company...(produced by the Bureau de Recherches Géologiques et Miniéres and the Centre National de la Recherche Scientifique... a. Geographic Coordinates peridot BA olivine group nesosilicates orthosilicates silicates BT minerals...(BT-NT) relationship is that of a group to an individual in the group, e.g., BT minerals to NT silicates |  | Rieck, B., Pristacz, H., Giester, G. (2015) Colinowensite, BaCuSi2O6, a new mineral from the Kalahari Manganese Field, South Africa and new data on wesselsite, SrCuSi4O10. Mineralogical Magazine, 79 (7) 1769-1778 doi:10.1180/minmag.2015.079.7.04 | Journal (article/letter/editorial) | | colinowensite, BaCuSi2O6, has been found in the Wessels mine, Kalahari Manganese Field, South Africa. It is associated...quartz, aegirine, richterite, minerals of the garnet group and a number of different manganese and iron...BaCuSi2O6. The new mineral is tetragonal, space group I41/acd with Z = 16, and a = 9.967(1), c = 22.290...: Colinowensite, BaCuSi2O6, new mineral, Wessels Mine, Kalahari Manganese Field, South Africa, wesselsite..., 2016). Recently, two samples from the Wessels Mine, provided by the mineral collector C.R. Owen, were |  | | Journal (issue) | | Branch: M. P. Gayton, F.G.A. South Yorkshire & District Branch: 1. R. M. Lewis, F.G.A. Examiners: B. W...seeing absorption bands in zircon and almandine garnet. He mentioned the tiny diamonds presumed to have...years held responsible posts in the Mineralogical Department of the British Museum (Natural History). In 1907...Tanzania, consist of solid solution series of the garnet end members pyrope, almandine, and spessartite...belong to a new, naturally occurring phase with garnet structure, which would justify a new mineral name |  | | Journal (issue) | | Arlesheim, Switzerland Harold and Erica Van Pelt Los Angeles, CA Julius Weber Mamaroneck, NY European... Dunn Famous mineral localities: the Gold Hill mine, Tooele County, Utah .............................Kokinos & W. S. Wise The Wagon Wheel Gap fluorspar mine, Mineral County, Colorado ............................33 by B. Cairncross The Jan Coetzee copper mine, Namaqualand, South Africa .......................41 by J.-M . Fourcault FMrTGMS-MSA Symposium on Garnet: Abstracts ....................... 61 Colum ns |  | | Journal (article/letter/editorial) | | carried out with the Rietveld method, cubic space group Ia3d, and monochromatic synchrotron high-resolution...because of the general formula, X3Y2Z3O12, for garnet. Phase 1a is near end-member grossular, ideally...[O4H4]4− replacing [SiO4]4−. The S. M. Antao (*) Department of Geoscience, University of Calgary, Calgary...temperatures (T), and chemical compositions. The garnet structure is flexible and can take up a variety...(ideal or non-ideal) thermodynamic behavior in garnet solid solutions and their petrogenetic significance |  | Antao, Sytle M., Zaman, Mashrur, Gontijo, Vitor L., Camargo, Eric S., Marr, Robert A. (2015) Optical anisotropy, zoning, and coexistence of two cubic phases in andradites from Quebec and New York. Contributions to Mineralogy and Petrology, 169 (2) doi:10.1007/s00410-015-1104-0 | Journal (article/letter/editorial) | | (NY), was refined with the Rietveld method, space group Ia3d, and monochromatic synchrotron high-resolution...· V. L. Gontijo · E. S. Camargo · R. A. Marr Department of Geoscience, University of Calgary, Calgary...1N4, Canada e-mail: antao@ucalgary.ca Keywords Garnet · Andradite · Anisotropy · Zoning · Two-phase intergrowth...properties and compositions over the period of garnet growth. Zoned andradite typically occurs in metasomatic... 1989; Ganguly et al. 1993). For the synthetic garnet, {Mg3}(MgSi)[Si3O12], the split reflections were |  | | Book (edition) | | Houston Dorothy Me Garry University of California, Los Angeles Patricia Sheahan Konsult International Inc...commonly have several variants, such as Great Smoky Group, Great Smoky Conglomerate, Great Smoky Formation...If used on level 1, Term set options are: rock group (carbonate rocks, chemi¬ cally precipitated rocks...was adopted. Broader Term (BT, BX, BA, BZ) - A group of which the Term is a member or an area in which...Term (NT, NX, NA, NZ) - A specific mem¬ ber of a group which is represented by the Term or an area within |  | | Book (edition) | | Classifications 84 85 Value of Gemstones 126 Tourmaline Group Fire Opal 168 . | 85 Description of Gemstones...Tiger’s-Eye 140 Chalcedony 142 142 see 142 oo 120 Garnet Group ie ‘ 176 Zoisite Species Tanzanite 176 Prasiolite...Anyolite 176 : 178 Hematite . 178 Pyrite 180 Feldspar Group Amazonite Moonstone 180 180 Orthoclase 180 Labradorite...jewelry, include amethyst, rock crystal, amber, garnet, jade, jasper, coral, lapis lazuli, pearl, serpentine...Stones, in short CIBJO (Confédération Internationale de la Bijouterie, Joaillerie, Orfevrerie des Diamants |
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