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| GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO BY W. S. BURBANK WITH A SECTION ON...Geography _ ______________ ___-__-__ Situation of the district _ _ _________________ Topographic features. ....Previous geologic and topographic work in the district. ____ ___________._-__-______--__. Field work...Gulch____.._____-----Sosthenes Gulch and Antoro mine __..-.-_ Vicinity of Round Mountain ____________..._________________. Southern part of district._____-______--_ Future exploration in the district.________---__._ Mines |
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| tourmaline pg. 353 369 Gem News International Andesine from Tibet and Inner Mongolia • Vivid kunzite...diamonds traditionally associated with the Wesselton mine, “Cape” for pale yellow COLOR GRADING “D-TO-Z”...those typically recovered from the “Jagersfontein” mine in South Africa (Shipley, 1950b; Liddicoat, 1993)...of color in a diamond. In the New York jewelry district on Maiden Lane, neighboring buildings were painted...With the influx of stones from Australia’s Argyle mine since the mid-1980s, there has been greater industry |
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| BULLETIN 9 GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT SAGUACHE COUNTY COLORADO By HORACE B. PATTON.................................... 69 The Rawley mine......................................... 69 Location.................. . . . . . 69 Rock formations in mine and tunnel................... 74 Vein systems ....tunnel.......... . . . . . . . . . 86 The Antoro mine....... . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . 89 The Cora mine. . . . . . . . . . . . . . . . . . . . . . . . |
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| Green, B. Jackson, J. Kalischer, Branch Chairmen: Midlands – P. Phillips, North East – M. Houghton, North...4.32 0.051 0.147 0.711785 ± 0.000042 Hualien mine 0.28 3.57 0.078 0.227 0.712853 ± 0.000040 ...TH nephrite Siberia, Russia VR nephrite Vitim mine 0.50 4.11 0.122 0.352 0.711390 ± 0.000031 ...The jadeitite veins, e.g. the one at the Maw Sit mine near the north end of the Jade Tract, are almost...Pearl: Hlaing (2001). China), furnished to the Empress a pearl of one inch in diameter, and to an envious |
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| Fluid Inclusions Confirm Authenticity of Tibetan Andesine Jewelry and Art 60 56 Green G’s Sabina Lee –...Madagascar, Kenya, Zambia, Mozambique, Malawi, Zimbabwe, and Tanzania at the center of the mining supply...the nation’s thriving gem and jewelry trade from mine to market, which is expected to grow even more over...director of Belmont Group, which owns an emerald mine in Brazil, mused, “In mining, more money can go...help workers and thus the entire industry, from mine to market. Benefits include developing a skilled |
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| lead-silver-zinc district ______________ _ Geochemical prospecting ___ ._ ____________ _ Future of the district ___________________...___________________ _ Zinc Hill district ___________________________ _ Lee district _______________________________...Hills-----------------------------------Santa Rosa mine ______________________ _ Deposits in the Talc City...acknowledgments _________ _ Deposits in the Darwin district ______________ _ Geology~------------------------------...City' Hills. Geologic map and sections of the Darwin mine area. Map of part of 400 level and section of the |
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| interest in the geo logy and mineral resources of Zimbabwe which followed the removal of United Nations sanctions...original Bulletin is the insertion of Table IIIA, Zimbabwe Mineral Production and Value, on page 114A. Due...for views of Wankie Colliery and the Trojan nickel mine, and to the Photographic Section of the Ministry...near Salisbury. facing page 23 IV Trojan Nickel Mine, near Bindura. facing page 33 V The Great Dyke...Complex. VI Chrome seam in the Great Dyke, Vanad Mine. VII Lower Karoo Landscape. No. 1 Colliery, Wankie |
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| geographical links with the ca 2.4 Ga Sebanga Poort Dyke (Zimbabwe), the Ringvassoy (Kola-Karelia) and du Chef dykes...considered a smaller analogue of the Great Dyke of Zimbabwe (Campbell et al., 1970), due to its funnel-shape...nium deposit, currently the largest underground mine in Australia, with ore reserves of 473 Mt at 1.66%...present-day surface in an oil exploration drillhole (Empress # 1; Stevens and Apak, 1999; Fig. 11). Layered...intersected at a depth of 1600 m in drillhole GSWA Empress 1A yielded a K–Ar age of 1058 ± 13 Ma in the Officer |
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| Gray-Blue-Violet Hydrogen-Rich Diamonds from the Argyle Mine Hackmanite/Sodalite from Myanmar and Afghanistan...million years old) sedimentary rocks of the Gers District between the Aquitaine and Languedoc regions of...“Gray-to-blue-to-violet hydrogen-rich diamonds from the Argyle mine, Australia,” Spring 2009 G&G, pp. 20–37). The New...gem-quality blue dolomite from the famous Muzo emerald mine in Colombia. The GEMS & GEMOLOGY WINTER 2011 ...brilliant is a rare blue dolomite from the Muzo mine, Colombia. Photo by Brad Payne. material was reportedly |
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| of vug. Reflected light, in air, 183 X. Smuggler mine; c. Galena (gn) replaced by hessite (hs) which was...gold (Au). Reflected light, in air, 218 X. Nancy mine; d. Tetrahedrite (td) interstitial to pyrite (py)...quartz (qz). Reflected light, in air, 153 X. Croesus mine; f. Single crystal of tellurium (Te) was largely...visible. Reflected light, in air, 157 X. Emancipation mine; g. Subhedral, bladed tellurium in penecontemporaneous...quartz. Reflected light, in air, 28 X. John Jay mine; h. Sylvanite (sv) and native tellurium (Te) in |
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| USSR Academy of Sciences, Chernogolvka, Moscow district, U . S . S . H . J. Foden, Bureau of Mineral Resources...Rhodesia, Box M.P. 167, Mount Pleasant, Harare, Zimbabwe. R.W. Ojakangas, Department of Geology, University...O. B o x . MP. 1 6 1 , Mount Pleasant, Harare, Zimbabwe. B.F. Windley, Department of Geology, University...MINERALISATION IN THE EARLY PRECAMBRIAN CRUST OF ZIMBABWE J.F. Wilson and T.H.C. Nutt 555 MINERAL OCCURRENCES...631 LITHIUM PEGMATITES OF AMARESHWAR, RAICHUR DISTRICT, KARNATAKA, INDIA T.C. Devaraju, N. Rajshekhar |
 | Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) |
| ct. Insufu rough emerald extracted from the Kagem mine in 2015. Lastly, on the 2th of October, the remarkable...(“the lion elephant”) was extracted from the same mine [3]. Other giant crystals have been discovered in...emerald crystals was discovered in the Carnaíba mine, Brazil; the specimen weighed 341 kg with 1.7 million... le Règne Minéral; (c) Emerald in quartz, Kagem mine, Zambia, longest crystal: 7.9 × 1.2 × 1.2 cm. The...(Figure 2). Colombia, Brazil, Zambia, Russia, Zimbabwe, Madagascar, Pakistan, and Afghanistan (Figure |
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| and Ore Deposits of the Boulder County Tungsten District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER...and Ore Deposits of the Boulder County Tungsten District Colorado By T. S. LOVERING and OGDEN TWETO GEOLOGICAL...__________________________ Principal rocks of the district.________________________ Pre-Cambrian rocks__...22 22 22 23 24 Pag-e Principal rocks of the district— Continued Early Tertiary igneous rocks— Continued...tungsten. _____________ _______ Deposits within the district ________ _______ _______ Outlying occurrences |
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| Opal Precious beryl Argentina Rhodochrosite Zimbabwe Peridot Chrysoberyl Precious beryl Emerald...the Superpit is Australia’s largest open pit gold mine and is one of the largest open pit mines in the...years later as a wedding gift from Napoleon III to Empress Eugénie, who was fascinated by, and modeled her...Antoinette is born in Vienna, 15th child of the Empress of Austria, Maria Theresa 1774 Louis Auguste takes...earrings remain in the French royal family 1870–72 Empress Eugénie is thought to sell the earrings to Duchess |
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| Shaokui Pan Comparison of Emeralds from the Chitral District, Pakistan, with other Pakistani and Afghan Emeralds...from North -eastern China / No. 6 / 2023 Gem-A Midlands Conference | Nineteenth Annual Sinkankas Symposium:...EXECUTIVE OFFICER Alan D. Hart BRANCH CHAIRMEN Midlands – Craig O’Donnell North East – Mark W. Houghton...as Beads for Necklaces Although the Benitoite Gem mine in California, USA, has been closed since 2005 (Laurs...was obtained decades ago from the Benitoite Gem mine in California, USA. Photo by Orasa Weldon. new |
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| Amblygonite Zirconia Dioptase Dolomite Tantalite Andesine Thulite Aventurine feldspar Friedelite Topaz...8-8/2 8-8tt Kassitente Pyrolusite Amazonite Andesine YAG 8 8 8 Aquamarine 7V2-8 Beryl Spinel...Aquamarine Emerald Precious beryl Labradorite Andesine 3.10 3.05-3.20 3.04-3.14 3.03-3.07 3.01-3.11...Crystal Citrine Prasiolite Smoky quartz Rose quartz Andesine Cordierite Oligoclase Talc Skapolite Amethyst...occurrence refers to all four terms. The Finch diamond mine Discovered 52 in 1960, first exploits a Kimberlite |
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| El Antimonio District Cananea District ...... Arizpe District ........... Nacozari District ...... Moctezuma...Moctezuma District ... Hermosillo District ... Alamos District ........ San Bernardo Area Alistos District...SECTION 2 — Highway 45 Sabinal District ............... Los Lamentos District.... Placer de Guadalupe Puerto...Aire District Chihuahua .......................... Santa Eulalia District....... El Potosi Mine........Antonio Mine....... Cusihuiriachic District..... Barranca de Cobre (Copper Canyon) Batopilas District Strip |
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| Scole- triclinic Albite Amazonite Amblygonite Andesine Anorthite Anorthoclase Axinite Bustamite Bytownite...Hancockite Pyrolusite Sogdianite NNSas Amazonite Andesine Anorthoclase Benitoite Bixbyite Bytownite Chondroite...Aquamarine Emerald Noble bery! Pyrophyllite Labradorite Andesine Amethyst Citrine Prasiolite Quartz Rock crystal...Howlite Amber Ametrine Analcime Anatase Andalusite Andesine Andradite Anglesite Anhydrite Ancerite Anorthite...Smoky quartz 1.544-1.553 Rose quartz 1.543-1.551 Andesine 1.542-1.578 Cordierite 1.542-1.549 Oligoclase |
 | | Book (edition) |
| Amblygonite Amethyst Ametrine Ammolite Andalusite Andesine Andradite Garnet Angelite Apatite Aquamarine Aragonite...discovered. Ruby from Murgab; Spinel from Kuh-i-Lal mine; Turquoise from Eastern Tajikistan, plus Emerald...from the Kuh-i-Lal mine in Afghanistan. Writings by Marco Polo suggested that the mine was said to be the...gem mine in the world still in operation and records trace its operations back to 101AD. This mine yields...the scientific tools available to us today. The mine is a maze of over 400 tunnels and miners today occasionally |
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| source ofgood advice); this book is as much yours as mine. 000001030626 TINT CONTENTS Contents Foreword...Opal and Umbalite. Other red-pink gems include Andesine, Bixbite, Clinohumi i)uw Yellow-Chocolate Gems...area where gemstones occur. A deposit is called a ‘mine’ after it has been worked and one gem deposit can...gemstone to pass through seven pairs of hands from the mine to being set in jewellery and then sold to the consumer...Tourmaline Rose Quartz Rubellite Ruby Star Ruby ZIMBABWE Chrysoberyl Emerald NAMIBIA Aquamarine Demantoid |
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| Pennine Scapolit e . Andesine . Beryl . Nepheline. Andesine . Rumpfite , Eucryptite Andesine . T.A. 5 . T...5 ~I.A. 3=35 Beryl 9 T.A. 4 Alunite M.A. 1-378 Andesine I~I.A. 1-281 Beryl . M A . 2-287 K~mmererite M...3-56 Scapolite . M.A. 1-12 Thenardite M.A. 2-562 Andesine . T.A. 5 Beryl . T.A. 4 Ekmannite M]A. 2-476 Oligoclase...ndesiae . T.A. 5 Ab35&n ~ (art.) T.A. 1 Beryl T.A. 4 Andesine lVl A. 3 - 7 9 Beryl T.A. 4 T.A. 4 Seapolite T...Aneylite, ealeio-, 3.82 Andalusite~ 3.118-3.29 Andesine, 2.663-2.675 Andradite, 8.50-3.85 Anemousite, |
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| Roberts, R Shepherd, CH. Winter Branch Chairmen Midlands: J.W. Porter North West: 1. Knight Scottish: J...found in the more famous emeralds from the Chivor mine. The next two papers reflect the growing importance...blue sapphire (filled square) in the Andranondambo mine. © Gemmological Association and Gem Testing Laboratory...compositions of three sapphires from the Andranondambo mine Sapphire 1 Weight % Range (3 anals) Sapphire...the region of Andranondambo (S.24°25,,E.46035,/ district of Amboasary, SSE-Madagascar, see Figure 2). The |
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| Abstracts POUGH (F. H . ) . The Jacobina amethyst mine in Brazil. J o u r n . , 1969, 22, 10, p. 1306....colour. Hard-rock digging techniques are used, as the mine lies in solid rock. It is privately owned. S.P....statuette in banded serpentine, a cut cuprite and an andesine-labradorite cat's-eye. A new source of peridot...finding coloured gems tones. Lepidolite in the Pala district has been dated by J o h n Earl using the rubidium-strontium...pink tourmaline at what later became the Stewart mine at Pala (Figs. 2 and 3). This stimulated a local |
 | | Book (edition) |
| Yugawaralite triclinic Albite Amazonite Amblygonite Andesine Anorthite Anorthoclase Axinite Bustamite Bytownite...Epidote Hancockite Pyrolusite Sogdianite Amazonite Andesine Anorthoclase Benitoite Bixbyite Bytownite Chondroite...Aquamarine Emerald Noble bery| Pyrophyllite Labradorite Andesine Amethyst Citrine Prasiolite Quartz Rock crystal...Ametrine Analcime Anatase Ancerite Andalusite Andesine Andradite Colemanite Coral Cordierite Corundum...544-1.553 Smoky quartz 1.544-1.553 Rose quartz Andesine Cordierite Oligoclase Tale j Scapolite — Amethyst |
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| The fact that only an extremely small part of a mine run can be polished and used in jewelry further...north-east Madagascar. Speaking about diffusion of Andesine feldspar, Claudio Milisenda presented a chronological...expeditions to the prime sources for natural red andesine in Tibet, only minor quantities of facetable material...However, since there are vast quantities of red andesine for sale in the gem market, it is assumed that...currently issued for red andesine state that the color of the red andesine cannot be determined. Meanwhile |
