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| Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar Karl Schmetzer, Thomas Hainschwang, Heinz-JĂźrgen...garnets with unusual color behavior from Tranoroa, southern Madagascar. 156 Update on the Identification...seen in other included diamonds. Dark, opaque graphite spots (figure 12, left) or pinpoint inclusions...II pinks were more likely to have dark, opaque graphite spots. Right: This type I diamond contains inclusions...CHROMIUM- AND VANADIUM-BEARING GARNETS FROM TRANOROA, MADAGASCAR By Karl Schmetzer, Thomas Hainschwang, Heinz-JĂźrgen |
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| ............. 22 2.5.3.1.2.5. Antetezambato, Madagascar ........................................................................... 27 2.5.4.1.1.3. Madagascar ................................................................... 40 2.5.9.1.1.2. Bekily, Madagascar ........................................................................... 42 2.5.9.2.2.2. Madagascar ...................................................................... 42 2.5.9.2.2.3. Tranoroa, Madagascar........................................ |
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| Pan-African granulite facies metapelites from Southern Madagascar Gregor Markl a,*, JuĚrgen BaĚuerle b, Djordje...metapelitic gneisses from five localities in Southern Madagascar exhibit very similar mineral assemblages and...tectonometamorphic history of the various parts of Southern Madagascar between 600 and 500 Ma. The P-T-conditions recorded...Keywords: Granulite; Thermobarometry; Pan-African; Madagascar; Gondwana 1. Introduction * Corresponding author...parts of Europe in addition to Sri Lanka and Madagascar (Stern, 1994; and references therein). The Panafrican |
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| Geigerflex diffractometer with CuKa radiation and a graphite monochromator. The scans were performed in the... Liddicoatite tourmaline from Anjanabonoina, Madagascar. D.M. DIRLAM, B.M. LAURS, F. PEZZOTTA AND W.B...come from the Anjanabonoina pegmatite in central Madagascar, mainly sold as polished slices or carvings....broad band due to Fe2+. Burma Gazetteer. Myitkina District. Volume A, 1960. W.A. HERTZ. Bulletin of the Friends...of a work covering the jade-producing Myitkina District of Burma (Myanmar) and including a useful bibliography |
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| Yellowish green and green chrysoberyl from Ilakaka, Madagascar ⢠âTashmarineâ: Diopside from central Asia â˘...Erongo Mountains, Namibia ⢠New morganite mine in Madagascar ⢠Namibian gem localities ⢠New opals from Brazil...Somerset, King William, and Prince of Wales Islands, District of Franklin. Geological Survey of Canada, Paper...kimberlite, north-central Mackenzie Mountains, District of Mackenzie, Northwest Territories. In J.A. Morin...B.A. (1996) Somerset Island kimberlite field, District of Franklin, N.W.T. In A.N. LeCheminant, D.G. |
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| courtesy of Rio Tinto; (4) an 11.16 ct sapphire from Madagascar, GIA Collection no. 31618; (5) a 1.01 ct yellow...competitive rough diamond market. Political problems in Madagascar and a ban on gem exports from Myanmar disrupted...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...for gemstones. New Deposits and New Operations. Madagascar. Much of the global gem business for well over...in the middle of the decade was dominated by Madagascar. This was due in part to the Malagasy PRODUCTION |
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| participation in the jewellery supply chain in Madagascar, are hosted on the programmeâs YouTube channel...fluorite crystals is the historic Weardale mining district in County Durham, northern England. Weardale is...from the Diana Maria mine in the Weardale mining district of County Durham, northern England. (a) They are...Rogerley and Diana Maria mines in the Weardale mining district, County Durham, northern England, is prized by...Umba (1.757; Jobbins et al. 1975) and from Tranoroa, Madagascar (1.768â1.773; Schmetzer et al. 2002); and |
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| Gem news from Mogok, Myanmar ⢠Moonstone from Madagascar ⢠Phenomenal fire opal ⢠âSunsetâ quartz from...Iron Ore ⢠Tourmaline mining at Nandihizana, Madagascar ⢠Green uvite from Afghanistan ⢠Synthetic corundum...Numerous small open-cut mines began operating in the district (Heylmun, 1983a), and the capital, QuerĂŠtaro City...in iridescent garnets from the Adelaide mining district, Nevada, by Akizuki et al. (1984). The same authors...(1943) Iridescent garnet from the Adelaide mining district, Nevada. American Mineralogist, Vol. 28, No. 5 |
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| in an oceanic environment. The Precambrian of Madagascar , covering t,.\-o-thirds of the island, h as...unpublished data. I °\Vas fortunate enough to visit Madagascar in 1965, gainii1g some firsthand kno"''ledge...similarity between the metamorphosed Precambrian of Madagascar and of Finlan d is indeed astonishing. It is...intercalated traps. He chose the name " Dharwar" from the district (no,v- in 1\1:ysore State) in which he first recognized...some of the quartzites occurring in the Tumkur district. B. JAYARAl\i succeeded W. F. SMEE1'H as Director |
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| Nigerian tourmaline ⢠New deep pink Cs-âberylâ from Madagascar ⢠New demantoid find in Kladovka, Russia ⢠Fire...fluid films on basal planes in a green beryl from Madagascar (magnified 66Ă). On the bottom, stretched air...On the left, one of the 4.2 mm bulk-diffused Madagascar sapphires shows the yellow rim indicative of...and a worker termite captive, this copal from Madagascar is badly scratched, which drastically affects...stones or cabochons, all originating from southern Madagascar, are opaqueânever transparentâor at best translucent |
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| in quartz ⢠âPlatinum quartzâ with star ⢠New Madagascar mining laws ⢠Black diamond with unusual growth...field trips to the world-famous Pala gem pegmatite district in San Diego County. These excursions will give... or purplish red corundum from Andilamena in Madagascar that was typically translucent to opaque. For...in Demantoid Garnet from Russia Garnets from Madagascar with a Color Change of Blue-Green to Purple Spring...to Pinkish Orange Malaya Garnets from Bekily, Madagascar âVoices of the Earthâ: Transcending the Traditional |
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| late 1990s when blue garnet was found at Bekily, Madagascar. Garnets can range in color from colorless to...impart green. The extremely rare blue garnets from Madagascar, actually pyrope-spessartine, derive their color...uranium-vanadium deposit of the Sandy Mine in the Laguna District, New Mexico, is the type locality for goldmanite...of the Kao Kimberlite Pipe in the Butha-Buthe district of the landlocked African Kingdom of Lesotho....the modem village of Donduran in the Yenipazar district of the city of Aydin in the Turkish Province of |
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| 31 / No. 5â8 Ruby and sapphire from Marosely, Madagascar Laurent E. Cartier Abstract: The Marosely corundum...corundum localities discovered in recent years in Madagascar. Colours range from red to blue, and stones are...Keywords: corundum, FTIR spectra, LA-ICP-MS, Madagascar, origin determination, UV-visible spectra Introduction...Since the discovery of Andranondambo in 1993, Madagascar has become an increasingly important source of...Giuliani et al., 2007). Considering that much of Madagascar has not yet been thoroughly explored, it is certain |
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| Effects of Heat Treatment on Zircon Inclusions In Madagascar Sapphires Wuyi Wang, Kenneth Scarratt, John...Colorless Colorless Sri Lanka Sri Lanka East Africa Madagascar Sri Lanka Verneuil synthetic 0.23â0.76 0.63â0...2 2 4 2 3 2 Sri Lanka East Africa Madagascar Tanzania Madagascar East Africa 1.56â3.87 0.47â2.31 0...Whitish pink Pink Madagascar East Africa East Africa Madagascar Unknown Madagascar Australia China East...and Africa (Zambia and Zimbabwe), as well as Madagascar. The geologic characteristics of emerald deposits |
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| to Pinkish Orange Malaya Garnets from Bekily, Madagascar âVoices of the Earthâ: Transcending the Traditional...Gemology in the Field Liddicoatite Tourmaline from Madagascar Star of the South: A Historic 128 ct Diamond...Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar Update on the Identification of Treated...Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar Spring 2003 Photomicrography for Gemologists...Gem-Quality CVD Synthetic Diamonds Pezzottaite from Madagascar: A New Gem Red Beryl from Utah: Review and Update |
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| field trip to the world-famous Pala pegmatite district in San Diego County will take place August 25...Storia Naturale, Milan Update on gem localities in Madagascar Gem Synthesis ⢠Dr. James Butler, Naval Research...that it wasâthe fact that it was actually from Madagascar resulted in its selling for less than onefifth...between the prices for comparable Kashmir and Madagascar stones. The matched pair of heated Burmese rubies..., 1986); and the sapphires of Andranondambo, Madagascar (GĂźbelin, 1996; GĂźbelin and Peretti, 1997). For |
