 | | Journal (issue) | | Acting Editor: Dr R. R. Harding Assistant Editor: M. J. O’Donoghue Associate Editors: Dr A. J. Allnutt...(Chislehurst), Dr C. E. S. Arps (Leiden), Prof. A. T. Collins (London), J. Finlayson (Stoke-on-Trent), Dr J. W...Jobbins (Caterham), Dr J. M. Ogden (London), Prof. A. H. Rankin (Kingston upon Thames), Dr K. Schmetzer (Petershausen)...(Petershausen), Dr J. E. Shigley (Carlsbad), Prof. D. C. Smith (Paris), E. Stern (London), Prof. I. Sunagawa...Sunagawa (Tokyo), Dr M. Superchi (Milan) Production Editor: M. A Burland The Editor is glad to consider |  | | Journal (issue) | | sulfide Kambove mine, Katanga, Republic of the Congo (now Zaire) loose crystals, a very difficult mineral...Oklahoma City (Rocky Mtn. Fed.). Hansen’s Minerals, Inc. Dr. Gary R. and Matlrine Hansen. Ph. (314) 432-2882...inor dam age to one crystal. 3 x 2 in., $60.00. QUARTZ w. Chlorite Inclusions. A.) K rem nitz, Hungary...fine, rare m in iature. $85.00. W O LFRA M ITE w. Quartz. T ong Wha, K orea. A 1.7 x 0.8 in. crystal of...attached to the base of a 2.8 x 1.0 in. crystal of quartz at a 3 0 ° angle. Both crystals are term inated |  | | Book | | a Mineral? 12 Streak 27 Composition 13 Occurrence and Localities 29 Characteristics IS Identification...Andradite 154 Quartz/Rock Crystal 174 Phenakite 155 Red Phantom Quartz 176 Rose Quartz 177 Smoky...Smoky Quartz 178 Amethyst 180 Agate 182 Chalcedony 184 Chrysoprase 185 Jasper 186 Contents ...gravity, luster, streak, and occurrence—are discussed in detail below. Quartz and Vyrite. IS Introduction...are usually referred to as “trace impurities.” Quartz is a good example of a mineral that can be transformed |  | | Book | | possessors. The nature of crystals Observation of quartz crystals, which are mainly of hexagonal, prismatic...of pyrite (cubic system); 2. crystals of smoky quartz (trigonal system); 3. prismatic crystal of phosgenite...faces (anhedral crystals). In the photo: Twinned quartz. Some stones are twinned, i.e. with two or more...subjecting a spherical piece of glass and another of quartz, to two simple experiments. The first, a chemical...The glass of quartz (b) subjected to a test of chemical solubility. the assumes one quartz the while shape |  | | Book (volume) | | book by K. V. Zinserling, Artificial Twinning of Quartz, published by the Academy of Sciences of the USSR...Historically, interest in the descriptive morphology of quartz, although long continued, was predominant in the...structural and crystallochemical properties of quartz and of the other polymorphs of silica are now the...the selection of colorless, limpid crystals of quartz and of other minerals as standards for the measurement...variations apparently always present in natural quartz. After a century of extremely precise and laborious |  | Derez, Tine, Van Der Donck, Tom, Plümper, Oliver, Muchez, Philippe, Pennock, Gill, Drury, Martyn R., Sintubin, Manuel (2017) Mechanisms of fine extinction band development in vein quartz: new insights from correlative light and electron microscopy. Contributions to Mineralogy and Petrology, 172 (7) doi:10.1007/s00410-017-1374-9 | Journal (article/letter/editorial) | | Mechanisms of fine extinction band development in vein quartz: new insights from correlative light and electron...lamellae) visible with polarized light microscopy in quartz consist of a range of nanostructures, inferring...that most FEB nanostructures in naturally deformed quartz are elongated subgrains formed by recovery of dislocation...nanostructure occur in naturally deformed vein quartz from the low-grade metamorphic High-Ardenne slate...associated with the primary growth banding of the vein quartz grain. The nanometre-scale fluid inclusions are |  | | Book | | the text. In addition, the authors wish to thank Dr. Clifford Frondel for reviewing the entire manuscript...mixtures. Some minerals, such as quartz and feldspar, are widespread in occurrence. Others, such as platinum...is an important aid to understanding mineral occurrence. Examples of such groupings are copper, lead...platinum metals, tantalum, industrial diamonds, quartz crystals, and strategic mica. With the possible...possible exception of industrial diamonds, quartz crystals, and mica, which are now in part produced synthetically |  | | Journal (article/letter/editorial) | | and minute balls of GOETHITE. earthy hematite, quartz (Broadhead 1873b, 1877). Audrain County Mexico...Columbia, in quartz-chalcedony geodes: DICKITE. In Pennsylvanian-age fossil wood: quartz as colorless...yellow scalenohedra, DOLOMITE, goethite (limonite), QUARTZ. Callaway County Knight bank (38-45-13N 093-03-44W)...line, south of Farmington, Iowa: GALENA, pyrite, QUARTZ (smoky) (Skeens 1951; Smith 1951). Warsaw geodes...KAOLINITE, malachite, MARCASITE, PYRITE, pyrolusite, QUARTZ, smithsonite, siderite, SPHALERITE (Sinotte 1969) |  | | Book | | second chapter, dealing with the genesis and occurrence of gem minerals, is followed by chapters on the...17 Ions and Chemical Bonding 20 2 Origin and Occurrence of Gemstones ............... . Gems from Solution...Early man undoubtedly discovered by accident that quartz and flint could be broken to produce sharp cutting...minerals have definite compositions; for example, quartz (rock crystal and amethyst) is silicon dioxide...although they are like minerals in chemistry and occurrence. In a rigorous classification such substances |  | | Report (edition) | | displaying folded bands of dark brown hematite, cherty quartz, and golden tiger eye. Bands are up to 10 mm thick...6 Feldspar group 65 Feldspar properties and occurrence................................................3 Siliceous gemstones Chapter 9 Quartz group 91 Gem-quality quartz.............................................................................. 92 Quartz mineral varieties.............................................................. 94 Geological occurrence............................................. |  | | | | Discovery Enterprises Worldwide: eighty publications, Dr. Brobst is a Michela English Senior Fellow of the...its primary mineral constituents, feldspar and quartz, granite is a very hard rock that resists weathering—a... Minerals of various kinds, including calcite, quartz, and iron oxide, cement the layers. LARGE AND...results is composed of a variety of minerals, usually quartz or calcite, but also aragonite, magnetite, barite...ENDLESS CYCLE Amethyst, a purple variety of quartz, some- times lines the cavities of geodes. Calcite |  | | Book | | education. Author of more than eighty publications, Dr._Brobst ~s a Senior Fellow of the Mrneralogical Society...its primary mineral constituents, feldspar and quartz, granite is a very hard rock that resists weathering-... Minerals of various kinds, including calcite, quartz, and iron oxide, cement the layers. LARGE AND SMALL...results is composed of a variety of minerals, usually quartz or calcite, but also aragonite, magnetite, barite... ENDLESS CYCLE Amethyst, a purple variety of quartz, sometimes lines the cavities of geodes. Calcite |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...Discm•t•ries, /960--20/ 5 ONTARIO Bentley Lake Road occurrence, Faraday Township, Hastings County. In fall 1994...site which they called the Bentley Lake Road occurrence, south of Bancroft. Sharp, flattened rhombohedral |  | | Book | | Oxide Z Plate 5 a) Cassiterite b) Tantalite c) Quartz d) Amethyst e) Agate f) Agate and Chalcedony 2:...proportion of them are extremely rare, both in their occurrence and distribution. It is only the specialist who...mineral is quartz, yet the coloured varieties of quartz, such as amethyst (purple) and citrine (yellow)...valuable as semi precious gemstones; pieces of clear quartz crystals (or "rock crystal") are used as oscillator...oscillator plates in the electronics industry; and quartz sands form the raw material for the manufacture |  | | Book | | photographs of museum mineral specimens; special thanks to Dr. Anthony R. Kampf, curator of Minerals and Gems....that glistening "sea glass" really a wave-tossed quartz crystal? Or could it be a piece of a petrified...manufactured arnber. © GIA. A JO-centimetre-long amethyst quartz "scepter" crystal, from Inyo National Forest in...Arnethyst is the purpu-color variety of crystalline quartz. Photo by Robert J%ldon. © GIA. Fossil ammonite...chemically bonded with covalent and/or ionic bonds. Quartz is the most common mineral species in the Earth's |  | | Book (edition) | | graphs gems gemstone's physical chemistry, occurrence, properties, and market potential. And spectacular...MATERIALS 16 16 239 / 18 / 19 / Luminescence Occurrence / Stone Sizes 233 15 / Comments / Journals...and useful. Please address all correspondence to Dr. Joel E. Arem, RO. Box I rections in the 5056,...example of this is the mineral quartz, the most common mineral on Earth. Quartz, in the form we see as component...characteristic of quartz vibrates too rapidly to hold together in the pattern of the quartz structure. An |  | | Journal (issue) | | NOTICE Died, Dr. Miguel Romero Sanchez, 72. The world lost a true gentleman and scholar when Dr. M iguel...died on January 8 , 1997 in Mexico City. Although Dr. Romero had been battling cancer for more than five...initiated two activities. The first is a trophy, “The Dr. Miguel Romero Trophy,” which will be awarded annually...they rem ark on the note worthy and unusual occurrence o f such a rare mineral. However, as contem porary...Journeys in Arizona (1958). Flagg cited it as an occurrence of slender, pale brown crystals of “endlichite” |  | | Book (edition) | | Spectral XXli xxiii XXV Inclusions Luminescence Occurrence Stone Sizes Comments GEM XXV XXV XXV XXV ...and useful. Please address all correspondence to: Dr. Joel E. Arem, P.O. Box 996, Laytonsville, Md. ...example of this is the mineral quartz, the most common mineral on earth. Quartz, in the form we see as pretty...characteristic of quartz vibrates too rapidly to hold together in the pattern of the quartz structure. An...as quartz (SiO2) but a different structure that is stable at higher temperatures than the quartz structure |  | | Journal (issue) | | Berilo Branco, the original "Sapucaia" rose quartz occurrence, Minas Gerais, B ra zil.....................by J. A. Mandarino COVER: ROSE QUARTZ on pale smoky/citrine quartz, the specimen known as "the Van Allen...(representing the first major discovery of rose quartz crystals) actually came from the Berilo Branco...For information about the Midwest chapter contact: Dr. Henry Barwood, President, Indiana Geological Survey...chapter contact Wes Gannaway, President, 1604 Brookwood Dr., Femdale, WA 98248; 206-384-4209 Pennsylvania Chapter: |  | | Journal (issue) | | 00 PYROMORPHITE, Phoenixville, Pa. Xld. crust on Quartz xis. 4 x 3 x 2 .. 2-.00 WILLEMITE, Franklin, N...EPIOOTE, Alaska. I ½" twin xi. in group w . green Quartz. 3 x 2 ..... . 5.00 ZIRCON, Brazil. Small green.... 3.00 PSITTACINITE, Nageib, S. W . Africa. On Quartz. 3 x I½ x 1 ¾ ..... . 3.00 BERYL, Brazil. Pale...xi. 1" . ..... . 2 .00 WOLFRAMITE, Arizona. In Quartz, polished slab. 3 x 2 ... ..•.. •... 2 .00 TETRAHEDRITE...Reei·es .................... 913 CRYSTALLINE QUARTZ OCCURRENCE NEAR BOULDER CITY, J\ USSOURI. By T. A. Pa11e |  | | Journal (issue) | | Editor: Dr R.R. Harding Assistant Editors: M.J. O'Donoghue, P.G. Read Associate Editors: Dr C.E.S. Arps...T. Collins (London), Dr J.W. Harris (Glasgow), Prof. R.A. Howie (Derbyshire), Dr J.M. Ogden (Hildesheim)...(Hildesheim), Prof. A.H. Rankin (Kingston upon Thames), Dr J.E. Shigley (Carlsbad), Prof. D.C. Smith (Paris),... E. Stern (London), Prof. I. Sunagawa (Tokyo), Dr M. Superchi (Milan), CM. Woodward (London) Production...orientated perpendicular to the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy |  | | Book (volume) | | flint, jasp-agate, jasper, Smoky Quartz 337 Ohio crystals, clear Quartz. From Brownsville, Licking Co...and beds⎯gem flint, translucent chalcedony, drusy quartz. LUCAS COUNTY SYLVANIA, SW, at jct. of Brint St...jasperlike flint, jasp-agate, jasper, Smoky Quartz crystals, clear Quartz.. ZANESVILLE, area mined deposits⎯Hematite...alabaster, agatized and petrified wood, and other quartz family gemstones from regional gravel pits and...ALTUS, area draws, washes, cut banks, gravels⎯Smoky Quartz crystals. JOHNSTON COUNTY MILL CREEK: c area mines⎯Manganese |  | | Book (volume) | | flint, jasp-agate, jasper, Smoky Quartz 337 Ohio crystals, clear Quartz. From Brownsville, Licking Co...and beds⎯gem flint, translucent chalcedony, drusy quartz. LUCAS COUNTY SYLVANIA, SW, at jct. of Brint St...jasperlike flint, jasp-agate, jasper, Smoky Quartz crystals, clear Quartz.. ZANESVILLE, area mined deposits⎯Hematite...alabaster, agatized and petrified wood, and other quartz family gemstones from regional gravel pits and...ALTUS, area draws, washes, cut banks, gravels⎯Smoky Quartz crystals. JOHNSTON COUNTY MILL CREEK: c area mines⎯Manganese |  | | Journal (issue) | | x 1 ½ Olttloch 11. Baveno. Small twin xis. with Quartz on rock. 3 ½ x 2 •• •• Ci■:, ..•. Mt. Avala. Xld...••• • ••• Woffr••ite. Cornwall. Xlline. masses in Quartz. 3 x 2 .....•.••• ••. Unarite, Cumberland. Xld...x 3 ..... . NttaciniN, S.W . Africa. On massive Quartz. 3 x 2 x 1 ½ . .••• •••.. Ull4p ■nll-. Chile. Coating...occasional large crystals of feldspar, masses of milky quartz, and small books of mica. These appear to be residuals...e~itor of this magazine. It was a great tnbute to Dr. Harry Berman whose tragic death occurred in 1944 |  | | Book (volume) | | from 18’ to 27’ long. In addition, gem Garnets, Quartz crystals, Topaz and Tourmaline add to the fascination...Scott Rose Quartz QuarryAmblygonite (large yellow crystals), Aquamarine, Chrysoberyl, Quartz (milky, rose)...pale lavender crystals of Fluorapatite, Kasolite, Quartz crystals, Mica, Tourmaline and Zircon (reddish...17 mi. (near Rte. 79), pegmatite outcropsRose Quartz;  S along US 385 for 32 mi. to Hot Springs in...boundary), on N side of rd. a few yds., outcropRose Quartz. DOUGLAS COUNTY CORSICA, S on US 281 to Armour |
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Quartz occurrence, Luena, Haut-Lomami, DR Congo