 | | 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...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | | Journal (article/letter/editorial) | | 117288)'Ampanobe, Flanarantsoa,Madagascar (brown) Ampanobe, Flanarantsoa,Madagascar (black) Ampanobe, Flanarantsoa...Flanarantsoa,Madagascar (black) Tanzania Pogas de Caldas, Minas Gerais, Brazil (ClT 4095)t Pogas de caldas...HENDERSON /---\ 5 a ,,t---./5 t F-_ --,-- 2 AMPANOBE 0 4000 0 5500 3000 2500 t W A V E N U M B... Australia(no. 1223). (no. 1467);and Ampanobe(black),Madagascar this and the following figuresspectrahavebeenvertically...and 1228-2). E. a m 10 5 4000 ,n-"^'^" - AMPANOBE 5500 3000 2500 t ) W A V E N U M B E( "Rr n |  | | Journal (article/letter/editorial) | | occurring with many desirable species such as topaz, beryl, and tourmaline. It is common in calc-alkaline...sheet mica pegmatite mines of the Spruce Pine district, Mitchell and Yancey counties. Relatively productive...pale tan zircon crystals from Mount Malosa, Zomba district, Malawi. Lino Caserini specimen, Jeff Scovil photo...locations are Rio do Paixe and Santa Terezinha district, Campos Verdes. Sharp zircon crystals to 1.5 cm...in Tordal where the mineral occurs with beryl, topaz, and cassiterite. Good zircon specimens have been |  | | Catalog/List | | Signature® Internet Session 2 Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 (HERITAGELive...Estimate: $400-$600 57002 Topaz Klein Spitzkopje, Spitzkopje Area, Karibib District, Erongo Region, Namibia...because it is the source for very fine and colorless Topaz crystals of high transparency. This one is of above...57007 Jeremejevite Ameib Farm 60, Usakos, Karibib District, Erongo Region, Namibia Jeremejevite crystals...Cuprite Onganja Mine, Onganja, Seeis, Windhoek District, Khomas Region, Namibia One of the iconic Cuprite |  | | Book | | Orthoclase 2 Gypsum 7 Quartz 3 Calcite 8 Topaz 4 Fluorite 9 Corundum 5 Apatite 10 Diamond...quartz veins. Graphite deposits are In Sri Lanka, Madagascar, Russia, South Korea, Mexico, the Czech RepubUc...(Germany); it occurs elsewhere at Lake Valley District (New Mexico, USA), Atonopah (Nevada, USA), Broken...Ivigtut (Greenland), where it is associated with topaz, siderite, galena, microcline, fluorite and other...other unusual fluorides. It Is also found In a topaz mine at Miask (Urals, Russia). Artificial cryollte | | | Book | | Orthoclase 2 Gypsum 7 Quartz 3 Calcite 8 Topaz 4 Fluorite 9 Corundum 5 Apatite 10 Diamond...quartz veins. Graphite deposits are In Sri Lanka, Madagascar, Russia, South Korea, Mexico, the Czech RepubUc...(Germany); it occurs elsewhere at Lake Valley District (New Mexico, USA), Atonopah (Nevada, USA), Broken...Ivigtut (Greenland), where it is associated with topaz, siderite, galena, microcline, fluorite and other...other unusual fluorides. It Is also found In a topaz mine at Miask (Urals, Russia). Artificial cryollte |  | | Book | | destroying the surrounding matrix of a crystal; a pink topaz crystal in light-gray rhyolite from the Thomas Range...reason for the greater value of a matrix specimen of topaz is that it is less common than an isolated crystal...is given below. 10 g 8 7 6 Diamond Corundum ‘Topaz Quartz Feldspar 5 4 3 2 1 Apatite Fluorite Calcite...O, as in gyp- sum, or as hydroxyl (OH), as in topaz. The oxide of silicon (SiO,) is referred to simply...country. A more consistent output comes from Madagascar, Ceylon, Mexico, Siberia, and Central Europe |  | | Book (volume) | | 113 SILLIMANITE.121 ANDALUSITE.129 KYANITE.137 TOPAZ.145 STAUROLITE.151 CHLORITOID.161 DATOLITE.171 SAPPHIRINE...Forsterite, crystalline limestone, Mogok Mining District, Burma (Adams and Graham, 1926). Olivine, with..., 1926. On some minerals from the Ruby mining district of Mogok, Upper Burma. Trans. Roy. Soc. Canada...the olivine group from occurrences in the Ensky district. Doklady Acad. Sci. USSR, vol. 57, p. 603. Sun...the olivine group from occurrences in the Ensky district. USSR, vol. 57, p. 603 (M.A. 10-419). Tilley, |  | | Book (edition) | | group and the aluminum silicate group (andalusite, topaz, etc.). It 1s to be noted that where- ever aluminum...Rounded and etched crystals are commonly observed in topaz and beryl. A crystal growing in cubic arrangement...Mineral System Ratios Galena Idocrase Beryl Topaz Epidote Rhodonite Isometric ‘Tetragonal Hexagonal...IDOCRASE | GS Top ISOMETRIC view TETRAGONAL TOPAZ BERYL Top 3 ies view Top view HEXAGONAL ...system, considerably less symmetry is shown in the topaz because faces are now disposed in rectangular fashion | | | Book (edition) | | group and the aluminum silicate group (andalusite, topaz, etc.). It is to be noted that ,vhereever aluminum...Rounded and etched crystals are commonly observed in topaz and beryl. A crystal grovving in cubic arrangement...Mineral System Ratios Galena Idocrase Beryl Topaz Epidote Rhodonite Isometric Tetragonal Hexagonal...system 128 GARNET Top view ISOMETRIC TETRAGONAL TOPAZ BERYL Top view Top view HEXAGONAL ORTHORHOMBIC...systen1, considerably less symmetry is shown in the topaz because faces are now disposed in rectangular fashion |  | | Book (edition) | | Orthorhornbic System Prisms, stauro/ite, barite, topaz; tabular, barite; pyran1ids, sulfur. Monoclinic...Cleavage Sphalerile. Pinacoidal Cleavage Mica, topaz. Rhombohedral Cleavage Calcite. Prismatic Cleavage...calcite, fiuorite, apatite, fe ldspar, quartz, topaz, and corundum, are readily available and low in...quartz (rock crystal), calcite, pyrite, gypsi:m, topaz, hematite, and fl,uorite. As hand specimens usefu...4). Silica tes Quartz (2.65), feldspars (2.56), topaz (3.5). CoLoR AND STREAK SuITE The influence of |  | 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) | | scratched by topaz and a few other minerals Hard Harder The hardest known mineral 8 9 10 Topaz Corundum...Mineralogical Magazine A. LaCroix, Mineralogie de Madagascar, 1922 P. Embry and Fuller Manual of New Mineral...Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral |  | | Book | | deposit, Great Bear Lake, Canada; Gold.fields district, Canada) (Fig. '2.7). Brecciated pitchblende 111ay...Canada and Schneeberg, Saxony. In the Blind River district of Ontario :fine-grained euheclral uraninite occurs...Dak.; Hyatt Beryl pegmatite, Crystal Mountain district, Colo.; Lac la Ronge, northern Sask.; Villeneuve...marbles and 1netapyroxenites of the Bancroft, Ont., district (pages 245-246 ); in serpentinite near Easton...Monticello district; T emple 1'4ountain, San Rafael district; La Sal Creek, Paradox district; or ( b) a |
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