 | Lira, R., Galliski, M. A., Bernard, F., Roquet, M. B. (2012) The Intragranitic Potrerillos NYF Pegmatites and Their a-Type Host Granites of the las Chacras - Potrerillos Batholith, Sierra de San Luis, Argentina. The Canadian Mineralogist, 50 (6) 1729-1750 doi:10.3749/canmin.50.6.1729 | Journal (article/letter/editorial) | | granitic pegmatites, in the Sierras Pampeanas Orientales of San Luis Province, Argentina, consist of mediumsized...K-feldspar and, locally, pods of primary fluorite. The pegmatite-forming minerals are quartz, microcline and albite...goethite, Mn oxides, clinobisvanite, bismuthite, and opal. The pegmatites are ascribed to the allanite–monazite...granodiorite or tonalite composition in the minimum melt field of Opx + Cpx + Grt ± Qtz, triggered by mantle-derived...canadian mineralogist Introduction The Conlara pegmatite district (Galliski 1994a, 1999) is located in |  | | Report (edition) | | expanded to include additional occurrences of emerald, opal, agate, chalcedony, organic gems, tiger eye jasper...................... 76 vi Chapter 8 Minor pegmatite gemstones 77 Lepidolite................................................. 107 Chapter 10 Opal 109 Opal properties.............................................................................. 109 Opal terminology......................................................................... 110 Precious opal in Western Australia........................... |  | Franz, Gerhard, Khomenko, Vladimir, Vishnyevskyy, Aleksei, Wirth, Richard, Struck, Ulrich, Nissen, Jörg, Gernert, Ulrich, Rocholl, Alexander (2017) Biologically mediated crystallization of buddingtonite in the Paleoproterozoic: Organic-igneous interactions from the Volyn pegmatite, Ukraine. American Mineralogist, 102 (10) 2119-2135 doi:10.2138/am-2017-6055 | Journal (article/letter/editorial) | | Paleoproterozoic: Organic-igneous interactions from the Volyn pegmatite, Ukraine Gerhard Franz1,*, Vladimir Khomenko2...late-stage evolution is characterized by the formation of opal-cemented breccia. A polymineralic pseudomorph after...component) + buddingtonite + organic matter (OM) + opal (+ traces of K-feldspar, albite, columbite, FeS2...C-N-content due to degassing; the OM contains the high field strength elements Zr (≤7 at%), Y (≤3 at%), Sc (≤0...nanometer-sized areas and at the transition from OM to opal in nanometer-sized platy Zr-Si-O crystals. C-rich |  | Cerny, P., Galliski, M. A., Oyarzabal, J. C., Teertstra, D. K., Chapman, R., MacBride, L., Ferreira, K. (2003) STRANDED AND EQUILIBRATED ASSEMBLAGES OF LATE FELDSPARS IN TWO GRANITIC PEGMATITES IN THE PAMPEAN RANGES, ARGENTINA. The Canadian Mineralogist, 41 (4) 1013-1026 doi:10.2113/gscanmin.41.4.1013 | Journal (article/letter/editorial) | | K-feldspar in two granitic pegmatites from the Pampean pegmatite province in Argentina shows similar patterns of...beryl – columbite – phosphate pegmatite in the Punilla pegmatite field, a single miarolitic cavity in...(ii) In San Luis II, a spodumene pegmatite in El Totoral pegmatite field, crystals of coarsely perthitic...microcrystalline secondary quartz, “chalcedony”, opal and goethite. Different subsolidus histories of...their cavity-lining K-feldspar. In El Criollo pegmatite, the cavity probably quickly lost residual aqueous |  | | Book | | Kuranakh River Ryabinovyi massif Rangkul' pegmatite field Rangkul' Khibiny Karaminskii Range Central...Udachnaya Zapadnaya pipe Khachakchan Rangkul'skoye pegmatite field Zorburulyuk River Ploskaya Mt. Vyuntspakhk...Sudak Selbur Karlukskaya cave Altyn-Topkan ore field Kandzhol Kandzhol deposit Kansai deposit Kandzhol...Russia Aldan shield, Siberia, Russia Almalyskoye ore field, Uzbekistan Azerbaijan Baikal Lake Central Kazakhstan...Sargardon Nikitovka Kalbinskii Range Mika Mika pegmatite Aldan Eastern Transbaikal Kola Peninsula Transbaikal |  | | Journal (issue) | | CONTENTS Page Feature Articles: The Coolgardie pegmatite field, Western Australia Mark I. Jacobson .........European correspondent. Pierre-Nicolas is weU known in France as a writer on mineralogical topics and is the...Mineralogy Vol 3, No 2, December 1997 %e Coo(gardie Pegmatite :fie[� 'Western .9Lustrafia Mark I. Jacobson Chevron...70593 California, USA This n otable Australian pegmatite locality has produced a range of lithium minerals...the Western Australian outback, an abundance of pegmatite fields stretch from the fiercely hot and arid |  | | Journal (issue) | | STATE GEOLOGICAL MUSEUM Rock crystal. Dauphine, France. 13 x 7 cm. VSGM, Is§20980, Photo: M, Leybov. ...cassiterite after orthoclase (Cornwall), precious opal after gypsum rose (Australia), and many others....others. Large fluorite druses from England, precious opal from Slovakia, agate from Germany, labrador from...collected by museum staff members during their field trips. In addition to minerals from the abovementioned...hall. A systematic division and the display "The Pegmatite Minerals" are located in the second hall. Expositions |  | | Journal (issue) | | black dravite specimens. Keywords: Tourmaline, pegmatite, eluvial deposits, gem mining, Brazil © Gemmological...place in the sequence of deposition within the pegmatite. Thus this property cannot be used to determine...in the fine morganite crystals from the Urucum pegmatite (Cassedanne, 1986); various micas, as needles...(Araçuaî area) or very thin large plates (Boa Vista pegmatite near Galiléia, Minas Gerais); apatite (Linöpolis...area, Minas Gerais); fluorite (Pedra Redonda pegmatite near Mantena, Minas Gerais); loellingite, as dark |  | | Journal (issue) | | deposits, and consequently with such severely limited field collecting opportunities, should foster a hot-bed...locations and contemporary deposits developed by field collectors. Size is not the main focus, as quality...Roberts, and subsequently discovered several new pegmatite minerals in the Black Hills of South Dakota; Bill...Almandine-spessartine on albite, 4.9 mm, Poaia pegmatite, Minas Gerais, Brazil. Beth Van Allen photo. ...(tiny pink spheres), 5-mm view, from the Tip Top pegmatite, Fourmile, Custer County, South Dakota. Thomas |  | | Journal (issue) | | SWEDEN 5 Cover 1. Hambeigite. Ranglad 'skoye pegmatite field, E. Pamirs. 8x 4 cm. Specimen:A.M. Skrigitil'...probably, by the geologists' lack of knowledge in the field of jewelry stones. On the basis of the materials...concentrate thus obtained is subjected to so-called field enrichment. This process consists in the extraction...most interesting pegmatites of the Rangkul' pegmatite field are distributed over the area of the Muzkol-Rangkul'...gemstones are distinguished in the Rangkul' pegmatite field. The first type comprises miarolitic pegmatites |  | | Journal (issue) | | INVERELL BLUE By Antoinette Rahn REGULAR COLUMNS Field Notes ........................... 6 Earth Science...the Congo, courtesy Heritage Auctions, www.ha.com; opal specimen, courtesy of The Arkenstone Gallery of...RandG_official rockngem.com 4 ROCKNGEM.COM FIELD NOTES This is the usual, but never boring, view...important. Additionally, as I mentioned in the Field Notes section of the July edition of Rock & Gem...www.covington-engineering.com 877.793.6636 NEW OPAL SHIPMENT IN FROM ETHIOPIA THIS MAY BE THE BRIGHTEST |  | | Journal (issue) | | terrain throughout much of the Pacific Northwest made field collecting more difficult than in areas to the south...community and dealers to serve them gradually evolved. Field collecting has flourished throughout the Northwest...December 1932, offering specimens from Washington and opal from Nevada, from his home address in Spokane. In...article with Henry Dake in Rocks & Minerals entitled “Opal from the Columbia Plateau.” He was President of...1923, at the age of 27, and became an enthusiastic field collector along with his first wife Hilda. It was |  | | Book | | MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for...AFRICA SoumAFRicA N'Chwaning II mine, Kalahari field, Northern Cape [Cape] Province. Although not quite...mcdougallminerals.com, 2015). Wessels mine, Kalahari field, Northern Cape [Cape] Province. Mining began in...Swanson quarry, East Haddam, Middlesex County. The pegmatite of the Swanson quarry is locally famous for its...2002). AFRICA MOZAMBIQUE Nanro [Naquissupa] pegmatite, Alto Ligonha district, Zambezia Province. In |  | | Book (edition) | | polished, 70 mm, Anjanabonoina, Madagaskar, G Page 5: Opal - fire, polished, 50 mm, Mezezo, Ethiopia, G Page...authors and a stud) of recent literature in the field of mineralogy. Current encyclopedic books mostly...Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite Sn2 /•O6'OH) 14Cl 1,, (3.D). Trigona]...celestine, fluorite, and jarlite in cryolite pegmatite at Ivigtut, Greenland. MR 24, 36, 1993. Adamite...dolerite at St.-Pandelon, near Dax, Landes dept., France, also at Karakat, Karamazar Mts., Tajikistan. BM |  | | Journal (issue) | | G., 1983. Vibrational spectra and valence force field of crystalline V 2 0 5 . Spectrochimica Acta, 39A(7)...Contributions, Symposium Universite de Toulouse, France, Mai 1989, 8 Dele-Dubois, M.-L., Poirot, J.-P,...with little oil, Raman, resin, interference in pegmatite dykes and pneumatolytic druses, most emeralds...necessary lighting includes reflected light, dark field a n d / o r fibre optic illumination. The latter...fields in single crystals of beryl from four pegmatite localities have been investigated by means of |  | | Journal (issue) | | Azurite & malachite breccia. Morenci, Arizona, USA. Field - 10 cm. Phelps Dodge Morenci Collection. Photo:...Exceptional Azurite and Cuprite specimens from Chessy, France. Ken HoHmann, P.O. Box 134, Center Rutland, Vermont...Montabone 872 Avenue du Pont des Dames 62 400 Bethune, FRANCE • v i i nsiweiбеr8 "rWoя« of39toпе8"canOut a....deposits. For example, the placers of the Svetlinskoye Field in the Southern Urals, contain several minerals...large masses of slime t o reveal the rubies. Our field crew worked in this region in 1986 and suggested |  | | Journal (issue) | | gem deposit in Mogok, Myanmar|Pink play-of-colour opal from Idaho|Dumortierite inclusions in quartz from...Washington, USA; Emmanuel Fritsch, University of Nantes, France; Rui Galopim de Carvalho, Portugal Gemas, Lisbon...emeralds with repaired (glued) fractures, a dendritic opal showing play-of-colour, an emerald parcel with imitations...magnetism, inclusions, physical and optical properties, opal mining, and a new section titled GEMFACTS that gives...almost 30 kg. It was mined in 1998 from the Urucum pegmatite in Brazil. Photo by B. M. Laurs. (1962, p. 287) |  | | Journal (issue) | | displays bluish-green / light yellow pleochroism. Field of view 4.25 mm. Plane polarized light. Hte long...ofchromerich jadeite in hte long sein jadeite jade. Field of view 4.26 mm across. Cross polarized light. ...residual crystal in hte long sein jadeite jade. Field of view 4.8 mm across. Plane polarized light. 323...most economically important gems are blue and pink opal, chrysocolla and silicified chrysocolla. Properties...also described. Keywords: blue opal, chrysocolla, gemstones, Peru, pink opal Introduction A 323 lthough |  | Černý, P., Chapman, R., Chackowsky, L. E., Ercit, T. S. (1989) A ferrotantalite-ferrotapiolite intergrowth from Spittal a.d. Drau, Carinthia, Austria. Mineralogy and Petrology, 41 (1) 53-63 doi:10.1007/bf01164810 | Journal (article/letter/editorial) | | ferrotantalite and ferrotapiolite occur in a pegmatite in Spittal a.d. Drau, Carinthia. They are associated...Ostalpen in general, and specifically of the Spittal pegmatite, is probably responsible for the recrystallization...tantalite, tapiolite, mineralogy, geochemistry, pegmatite, Ostalpen, Austria. Zusammenfassung Eine Ferr...Mineralparagenese angenornmen werden. Introduction The pegmatite exposed in a feldspar quarry at Spittal a.d. Drau...numerous paragenetic and textural observations. The pegmatite body northeast of Spittal a.d. Drau is the most |  | Popov, Daniil V., Spikings, Richard A., Scaillet, Stéphane, O'Sullivan, Gary, Chew, David, Badenszki, Eszter, Daly, J. Stephen, Razakamanana, Théodore, Davies, Joshua H.F.L. (2020) Diffusion and fluid interaction in Itrongay pegmatite (Madagascar): Evidence from in situ 40Ar/39Ar dating of gem-quality alkali feldspar and U Pb dating of protogenetic apatite inclusions. Chemical Geology, 556. 119841pp. doi:10.1016/j.chemgeo.2020.119841 | Journal (article/letter/editorial) | | Diffusion and fluid interaction in Itrongay pegmatite (Madagascar): Evidence from in situ 40Ar/39Ar...1A rue de la Férollerie, 45071 Orléans Cedex 2, France Department of Geology, School of Natural Sciences...gem-quality alkali feldspar from the Itrongay pegmatite in Madagascar. Previous studies have suggested...cogenetic feldspar and apatite from the Itrongay pegmatite and comparing them with each other. However, our...derived from the country rocks of the Itrongay pegmatite. These yield older UePb dates than the estimated |  | | Catalog/List | | 72062 Gemstone: Black Opal - 9.95 Cts. Australia This offering is a gorgeous Black Opal from Australia. This...This variety of Opal is one of the most desirable due to its rare black body color and strong play-of-color...nice polish, a low dome, and a rounded girdle. This Opal is a unique offering of the prized variety, which...Estimate: $1,000-up Starting Bid: $500 72063 Gemstone: Opal - 32.65 Cts. Magdalena, Magdalena Municipality Jalisco...unique offering of Opal. This curiosity comes from Mexico and is known as a Matrix Opal, which is play-of-color |  | | Book | | pre-Cambrian shield area, cut by thousands of pegmatite dikes and associated metamorphic rocks, the variety...the mineral assemblage one might expect from pegmatite dikes, Brazil also produces a very significant...who is to gainsay the latter? In this treacherous field, where natural wonders can be duplicated with synthetic...world of gemstones apart from almost any other field is its individualism. Without the individual prospector...Salininha deposit is an east-west lenticular pegmatite, sandwiched between gneiss and carbonated talc |  | | Journal (issue) | | Associate Editors Pierre Bariand Sorbonne Paris, France Bill Birch Museum of Victoria Melbourne, Australia...Schwab Orléans, France Associate Photographers Nelly Bariand Sorbonne Paris, France Dan Behnke Northbrook...artist, mineralogist, bibliophile, bookseller, field collector, lapidarist and gemologist. Born in Paterson...University of California. He also spent much time field collecting in the San Diego County localities. He...Regularly! Alpine Mineral Company Fine Alpine and Gem Pegmatite Minerals www.alpineminerals.com e-mail: kevin@alpineminerals |  | | Book | | crystals on large, well-formed grey graphite crystals, field of view 3 cm - Philip Hitge specimen, Bruce Cairncross...including a pink ruby corundum (back left); green prase opal (back right); blue sapphire corundum; orange spessartine...clear quartz; purple amethyst; orange 'cat's eye' opal; yellow danburite. In the centre are blue tanzanite;...kornerupine Li- lithium B - beryl Chr- chrysoberyl 0-opal Cl- clinohumite R- ruby Cp- chrysoprase S-sapphire...alexandrite and found in biotite schist and associated pegmatite. Later investigations in the same Figure 33 A |  | | Journal (article/letter/editorial) | | ....................................616 Mawi Pegmatite....................................619 Nilaw and...and Korgal Pegmatites.............. 630 Kulam Pegmatite.................................. 631 Paprok Pegmatites.................................. 633 Parun Pegmatite Field ......................... 656 Kunar Province.............................658 Pech Valley Pegmatite Field.................658 Pricing and Marketing Specimens...Afghanistan and surrounding area in 1887. The pegmatite areas north of the Kunar River—red dots—were largely |
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Pegmatite field, Collioure, Céret, Pyrénées-Orientales, Occitanie, France