 | Simmons, W. B., Pezzotta, F., Falster, A. U., Webber, K. L. (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. The Canadian Mineralogist, 39 (3) 747-755 doi:10.2113/gscanmin.39.3.747 | Journal (article/letter/editorial) | | ANALOGUE OF RHODIZITE FROM THE ANTANDROKOMBY GRANITIC PEGMATITE, MADAGASCAR WILLIAM B. SIMMONS§ Department...with rhodizite at Antandrokomby, a dike of granitic pegmatite in the Manandona valley, Antsirabe region...in the Betafo region south of Mahaiza, all in Madagascar. Londonite occurs in the inner zones and in miarolitic...tourmaline. Associated minerals include microcline, quartz, albite, tourmaline (elbaite – liddicoatite – schorl...calculated from an average of five analyses from Antandrokomby is: (Cs0.48K0.38Rb0.09Na0.03Ca0.02Mn0.01)⌺1 |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...watercolor by Valter Fogato Title Page Photos Quartz crystal with hematite from Mangatobangy, IO cm |  | | Report (issue) | | 13.769(9) Z=2 X-ray Powder Pattern: Antandrokomby, Madagascar. 6.92 (100), 3.447 (80), 2.376 (35), 4...97 0.48 0.20 14.10 100.22 5.84 (1) Antandrokomby, Madagascar. (2) Do.; combined wet chemical analysis...di®erentiated quartz-microclinetourmaline-bearing pegmatites. Association: Elbaite, quartz, microcline...Distribution: Madagascar. Name: At the Antandrokomby pegmatite, on the Manandona River, Sahatany Valley, For...For the Manandona River, nearby the type locality in Madagascar. Type Material: n.d. References: (1) |  | Biagioni, Cristian, Meisser, Nicolas, Nestola, Fabrizio, Pasero, Marco, Robyr, Martin, Roth, Philippe, Schnyder, Cédric, Gieré, Reto (2018) Hydrokenopyrochlore, (□,#)2Nb2O6·H2O, a new species of the pyrochlore supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar. European Journal of Mineralogy, 30 (4) 869-876 doi:10.1127/ejm/2018/0030-2761 | Journal (article/letter/editorial) | | supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar Article in European Journal...supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar CRISTIAN BIAGIONI1,*, NICOLAS...discovered in the Antandrokomby pegmatite, Sahatany Pegmatite Field, Antananarivo Province, Madagascar. It occurs...in size, with a resinous luster, associated with quartz, tourmaline, orthoclase, Li-bearing mica, hübnerite...portions of the pegmatitic dikes in the Sahatany Pegmatite Field. Key-words: hydrokenopyrochlore; new mineral |  | | Journal (article/letter/editorial) | | up to four forms of ferroan dolomite followed by quartz and barite and rarely whewellite. Most of the apatite...bones. ..- RECENT MINING AT THE ANTANDROKOMBY PEGMATITE, MADAGASCAR J. W Nizamofl’ A. U.FalsteG’ F. Pezzotu...Earth Science Dept., Adrian, MI 49221. The Antandrokomby pegmatite is a steeply dipping dike located about...kilometers south of Antsirabe, in the Manandona Valley, Madagascar. The dike strikes approximately northeast...observed dimensions of the pegmatite are 350 x 1.2 meters. Geochemically, the pegmatite is classified within |  | | Report (issue) | | Diffraction Pattern: Sahatany Pegmatite Field, Antananarivo Province, Madagascar. 3.136 (s), 3.006 (s), 1...11.94 100.00 (1) Sahatany Pegmatite Field, Antananarivo Province, Madagascar; average electron microprobe...From a Li-Cs-Ta-type pegmatite intruded into dolomitic marble. Association: Quartz, orthoclase, Li-rich...the Antandrokomby pegmatite, near Mt. Ibity, southern Sahatany Pegmatite Field, Manandona Valley, Vakinankaratra...Vakinankaratra region, Antananarivo Province, Madagascar. Name: The first prefix, hydro, indicates dominant |  | Pekov, I. V., Yakubovich, O. V., Massa, W., Chukanov, N. V., Kononkova, N. N., Agakhanov, A. A., Karpenko, V. Y. (2010) Londonite from the Urals, and new aspects of the crystal chemistry of the rhodozite-londonite series. The Canadian Mineralogist, 48 (2) 241-254 doi:10.3749/canmin.48.2.241 | Journal (article/letter/editorial) | | (both cotype localities) and Alabashka granitic pegmatite fields, Central Urals, Russia. All are Cs-dominant...structure-type, infrared spectrum, granitic pegmatite, Urals, Russia, Madagascar. Sommaire Ce travail porte sur...sodalite, spectre infrarouge, pegmatite granitique, Ourales, Russie, Madagascar. Introduction Rhodizite and...years of 20th century, rhodizite was found in Madagascar, where it is a relatively common mineral of many...localities in Madagascar. Both K- and Cs-dominant samples have been found in Madagascar pegmatites. Until |  | | Journal (article/letter/editorial) | | 1980). It occurs sparingly with axinite in a pegmatite near Butte, Montana, where it was originally misidentified...crystals to 10 cm across were found in the 527 pegmatite exposed in the Jensen quany, Riverside County...bakerite, calcite, chalcopyrite, sphalerite, and quartz, some of which is citrine in lustrous, pale yellow-tan...adularia, apatite, pericline-twinned albite, and quartz. Danburite has also been collected at the adjacent...Norway. Danburite has been reported from several Madagascar localities. Large yellow crystals have been recovered |  | | Journal (article/letter/editorial) | | Cover Photographs JanuarylFebruary: Tourmaline on quartz, Cruzeiro mine, Minas Gerais, Brazil. Los Angeles...Gonzalo Jara specimen, Jeff Scovil photo. May/June: Quartz (amethyst), near Badger Creek, north of Coaldale...Bunk specimen, Jeff Scovil photo. July/August: Quartz cluster (Herkimer “diamonds’’), Treasure Mountain...Antlerite, Utah, 244 Apatite, Bahia, Brazil, 38; Madagascar, 256; Michigan, 96; Ohio, 255 Aquamarine, Minas... Miguel Arrojado Ribeiro Listoa, 47 Arsenic, Madagascar, 256 Arsenopyrite, Colorado, 337; Maine, 412 |  | | Journal (issue) | | the best anywhere. Handsome specimens of barite, quartz, rhodochrosite, silver, and numerous other species...west. Butte is situated in the Summit Valley, an intermontane valley at an elevation of 1,800 meters (5...Marcosson, 1957). By the winter of 1864 the Summit Valley district (Butte’s original name) had been organized...district and examined some claims on the large black quartz reefs located just below the big butte overlooking...sense, Clark purchased four properties within the quartz-rich zone anyway: the Original, the Colusa, the |  | | Journal (issue) | | for Rocks & Minerals in 1938 about finding smoky quartz in the Crystal Peak area (Hurianek 1938). Jerry...Florissant and Lake George for amazonite and smoky quartz for the past 150 years, but few have had the long...cabinet-size combination of amazonite and smoky quartz, composed of large, well-formed crystals associated...aesthetic small-cabinet cluster of transparent smoky quartz and lustrous amazonite, ca. 13 cm across. tif#l:i...Author's photo. SPECIALIZING IN AMAZONITE & SMOKY QUARTZ SPECIMENS JERRY HURIANEK THELMA HURIANEK CALL |  | | Journal (article/letter/editorial) | | Decomposesin air in a few weeks becauseof hycalcite, quartz (main rock-forming minerals), tremolite, dration...that encrusts carMoschelite* bonate-apatito on quartz in secondaryseamsat the Tip E.R. Krupp, G. Nottes...(HgrJJ: A new mercury mineral from Landsberg- Top pegmatite, Custer, South Dakota. The new name reflectsthe..." :3.64 g/cm3 mineral speciesfrom the Tip Top pegmatite,South Da- wlth Z : 8. Optically biaxial positive...specimen newly collected from the Antandrokomby pegmatite, Madagascar (type locality)gaveSiO, 23.02,8,O37 |  | | Journal (issue) | | Juchem wieder möglich 7-11 Grossular 13-17 Die Pegmatite von alto Ligonha in NordMozambique 18-23 Calcit...N.Y.; apatite-XX in Ohio ; Antandrokomby pegmatite (tourmaline), Madagascar ; tourmaline from pegmatites...271-274 Geologische Wanderungen in Andalusien : pegmatite und hydrothermale Lagerstätte in der zentralen...MINERAUX ET FOSSILES HS # 11, 06.00 Themanummer : Quartz et autres minéraux de la silice * LAPIDARY JOURNAL...shaft) B 3306 Wheal Castle Kenidjack or Nancherrow Valley To St.-Just Wheal Call Arsenic shaft Wheal Drea |  | | Journal (issue) | | Calcite-Kevin & Mark Brown collection, page 52; Smoky quartz gwindel-Brent Lockhart collection, page 175; Aquamarine-Wally...unearthing many fine specimens of gadolinite, smoky quartz, fluorite, feldspar in crystals to five feet across...across, and more. Exploitation of this remarkable pegmatite continued intermittently until 1937, when the...piece of "heavy quartz" in a stream bed. lt proved to be topaz from a Precambrian pegmatite cutting coarse-grained...medium-violet arnethyst crystal specimens from quartz veins. And textbook-sharp, colorless and transparent |  | | Journal (issue) | | Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar Brendan M. Laurs, Federico Pezzotta...Process ratified • Alexandrite from Mananjary, Madagascar • Colorchange apatite from Kazakhstan • New emerald...turquoise) or surface-reaching fractures (such as quartz or corundum), to modify their color appearance...However, there are still a number of gems (such as quartz, tourmaline, and tanzanite [zoisite]), where the...68); and Steve Ulatowski of New Era Gems, Grass Valley, California, for the before-and-after sample of |  | | Journal (issue) | | Museum Toronto, Ontario Steven R. Morehead Green Valley, AZ Donald R. Peacor University of Michigan Ann...certain gem materials including corundum, spodumene, quartz and topaz. Recent tests conducted by the Gemological...However, color changes can take place in fluorite and quartz at dosages around 20 megarads, and possibly lower...Regularly! Alpine Mineral Company Fine Alpine and Gem Pegmatite Minerals www.alpineminerals.com e-mail: kevin@alpineminerals...colored by copper. Cuprian elbaite from the Batalha pegmatite veins, unrecognized until the 1980’s, has become |  | | 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,...major associations of Swiss hematite iron roses are quartz, ortboclase, albite, rutile, and zeolites (especially...as sharp rhombohedral crystals to 8 cm on and in quartz; the ilmenite crystals have uniform orange-yellow |  | | Book (volume) | | yegorovite Na4[Si2O4(OH)2]2·7H2O from the Palitra pegmatite, Lovozero massif, Kola peninsula hydrated proton)...MgB6O7(OH)6·2H2O Locality: Chelkar salt dome, Aksai Valley, Aktobe region, Kazakhstan (type locality). Description:...MgB6O7(OH)6·2H2O Locality: Chelkar salt dome, Aksai Valley, Aktobe region, Kazakhstan (type locality). Description:...Locality: Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune...Vakinankaratra Region, Antananarivo Province, Madagascar. Description: Grey grains from the association |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Especially when the mineral species is common, such as quartz (75.1.3.1), many varieties (jasper, onyx) are known...chemistry and structure are identical to those of quartz. 5D. Polytypes Materials whose basic structural...only with fibrous minerals Columbite, wolframite Quartz Opal, some yellow varieties of sphalerite Nepheline...are distinctive. Chonchoidal fracture, typical of quartz, gives a fracture similar to the interior of a...Calcite 4 5 6 Fluorite Apatite Orthoclase a Quartz Soft, greasy feel like tale and graphite, and |  | | Report (volume) | | Significance 317 Breccias and veins within granite or pegmatite 318 Occurrence and composition 318 Significance...magmas: Dravite 376 Tourmaline stability in magmas: Quartz-tourmaline assemblages 376 Tourmaline stability...Spositio, George H. Swihart, John A. Tossell, John W. Valley, David J. Waters. Assistance from John Jambor,...Kramer H (1957) Ginorite and sassolite from Death Valley, California. Am Mineral 42:56-61 Anthony JW, Bideaux...Gowerite, a new hydrous calcium borate, from the Death Valley region, California. Am Mineral 44:911-919 Erd RC | | | Report (volume) | | MATHEMATICAL CRYSTALLOGRAPHY 16 1986 570 J.W. Valley H.P. Taylor, Jr. J.R. O'Neil STABLE ISOTOPES IN...ememeenae es 317 Breccias and veins within granite or pegmatite.................c.sceceeeeee eeeeee318 OCCUEPENCE...:cceeeeeeeeeeees Tourmaline stability in magmas: Quartz-tourmaline assemblages...... Tourmaline stability...Spositio, George H. Swihart, John A. Tossell, John W. Valley, David J. Waters. Assistance from John Jambor,...Kramer H (1957) Ginorite and sassolite from Death Valley, California. Am Mineral 42:56-61 Anthony JW, Bideaux |  | | Book | | SHAPE program available from Eric Dowty, 521 Hidden Valley Road, Kingsport, Tennessee, 37663, USA. The authors...Al)802o(OH)4*4H20, 0 Syst=? Monte Chiaro, Taro Valley, Italy. H=?, Dvv,=?, Dp=?, VHIE 08c. Veniale &...E Mon. Porcelanous white. Furnace Creek, Death Valley, Inyo Co., California, USA. H=4.5, Djj4= 2.88,...brown. Balangero serpentinite, Lanzo massif, Lanzo Valley, Piemonte, Italy. H=?, Djjj= 2.98, D(;= 3.098,...Translucent dark blue-green, green. Sapucaia Pegmatite, Galileia, Minas Gerais, Brazil. H=6, Djjj=3.60 |
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