 | | Journal (article/letter/editorial) | | origin of the corundum-bearing skarn at Bakamuna, Sri Lanka K. K. M. W. Silva and C. H. E. R. Siriwardena...Geology, University of Peradeniya, Peradeniya, Sri Lanka Abstract. A corundum-bearing skarn deposit was...are the main and most precious gems produced by Sri Lanka. The in situ occurrence of corundum has been described...of charnockites. During recent field work at Bakamuna north of Elahera (Fig. 1) the authors discovered...discovery of such rocks in large occurrences in Sri Lanka, and it appears to be the main source of sapphires |  | Giuliani, Gaston, Fallick, Anthony E., Boyce, Adrian J., Pardieu, Vincent, Pham, Van Long (2017) Pink and Red Spinels In Marble: Trace Elements, Oxygen Isotopes, and Sources. The Canadian Mineralogist, 55 (4) 743-761 doi:10.3749/canmin.1700009 | Journal (article/letter/editorial) | | Fo þ lizardite, Lz) skarn rock associated with phlogopite (Phl) and mackinawite (Mk) from the Kuh-i-Lal...Pardieu/GIA; (E) E. Gaillou/ENSMP. Badakshan Province in Afghanistan (Spencer 1937). In Roman times...countries and also at Ilakaka in Madagascar and Sri Lanka. Up until now, the mineralogical and physical...Myanmar with the Mogok mining districts in the north central part of the country (Fig. 5). Spinel is occasionally...in the northern part of Myanmar, and also in Sri Lanka and Madagascar, for which the nature of the primary |  | Giuliani, Gaston, Fallick, Anthony, Rakotondrazafy, Michel, Ohnenstetter, Daniel, Andriamamonjy, Alfred, Ralantoarison, Théogène, Rakotosamizanany, Saholy, Razanatseheno, Marie, Offant, Yohann, Garnier, Virginie, Dunaigre, Christian, Schwarz, Dietmar, Mercier, Alain, Ratrimo, Voahangy, Ralison, Bruno (2007) Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita, 42 (3) 251-270 doi:10.1007/s00126-006-0105-3 | Journal (article/letter/editorial) | | rocks with the formation of metasomatites such as phlogopite, sakenite, and corundumite. Secondary deposits...alkali basalt environments in the northern and central regions of Madagascar have consistent δ18O values...Eastern Africa, India, and Sri Lanka is presented. Giant placer deposits from Sri Lanka, Madagascar, and Tanzania...gem corundum from Eastern Africa, India, and Sri Lanka is presented. Introduction For over 10 years...the main world producers of East Africa, India, Sri Lanka, Myanmar, Thailand, and Australia. Since 1993 |  | | Journal (issue) | | Spinels of Mogok – A Brief Overview Spinels from Sri Lanka 54 The Spinels of Mahenge, Tanzania In Search...Responsibility 94 Book Review Discovering the Gems of Sri Lanka 98 100 108 113 Members 14 Saurabh Bansal Damien...Shirley Xue Li Zhang, Hong Kong E. Gamini Zoysa, Sri Lanka Advisors Jean Claude Michelou, Colombia Ruben...countries, as well as Ilakaka in Madagascar and Sri Lanka (Langerwey, 1974; Gorghinian et al., 2013). Until...Myanmar with the Mogok mining districts in the north-central part of the country. Spinel is occasionally |  | | Journal (article/letter/editorial) | | an importa nt feature of the Carnaib a de Baixo district accounti ng for a producti on of 135 tons between...Trecho Novo underground mines in the central part of the emerald district. In the Trecho Novo 167 mine, exploited...metaso matic zones of green chlorite schist and phlogopite schist. Pegmatite veins crosscutting the deformed...the Nova Era region. 61 @. OVERT'HRUSTlr.!G NORTH-SOUTH ( !40°/160°) ' s1 • Jo•t:uo• ~ N r.J\-...VIEIItTICAL SECTION PARALLEL 1'0LX ~ s••@ E ...--NoRTH "" EME:RALO MINERALI~ATION SITUATED ALONG © |  | | Journal (article/letter/editorial) | | inclusions. Three metamorphic-type sapphires from Sri Lanka, Madagascar, and Tanzania were studied here using...Materials Sapphires from Tunduru, Tanzania; Elahera, Sri Lanka; Andranondambo, Madagascar, and Anakie, Australia...Montana, U.S.A.; ROC, a sapphire from the Rock Creek district of Montana, U.S.A.; and ANA, a sapphire from the...sample was collected from the Elahera gem field of Sri Lanka. This is an alluvial deposit that is also generally...TUN is an oblate, rounded polished plate with a central, dark brown, included core surrounded by transparent |  | | Book | | WolfgangHofmeister PetrogenesisoftheSnezhnoeRubyDeposit,CentralPamir Reprinted from: Minerals 2020, 10, 478, doi:10...awarded a PhD in Geology at James Cook University of North Queensland in 1982. His research has focused on...various Mogo Gem Tract sites, Myanmar; Elahera, Sri Lanka. Novel methodology developed to cater for low...examine distributions of Myanmar, Andrebabe and Sri Lankan fields. Multivariant statistical analysis,...largely from South East Asia: Thailand/Cambodia, Sri Lanka, Mogok and Myanmar, but also from more limited |  | | Journal (issue) | | clockwise from left: a 64.45 mm Sri Lankan sapphire crystal, a 24.34 ct Sri Lankan blue sapphire, two cuprian...mm pink-purple Sri Lankan sapphire crystal, a 10.90 ct Burmese ruby, and an 11.11 ct Sri Lankan alexandrite...blue sapphire was thought to exclusively indicate a Sri Lankan origin. Photo by Tino Hammid. trace elements...was long thought that this property pointed to a Sri Lankan origin. However, as more deposits were found...from.” We know that some blue sapphires from Sri Lanka are almost identical to Burmese sapphires, and |  | Krebs, Mandy, Hardman, Matthew, Pearson, David, Luo, Yan, Fagan, Andrew, Sarkar, Chiranjeeb (2020) An Evaluation of the Potential for Determination of the Geographic Origin of Ruby and Sapphire Using an Expanded Trace Element Suite Plus Sr–Pb Isotope Compositions. Minerals, 10 (5) 447 doi:10.3390/min10050447 | Journal (article/letter/editorial) | | and include (1) most deposits in Southeast and Central Asia (e.g., Myanmar, Vietnam, and Afghanistan)...others, for metamorphic or metasomatic rubies; (3) Sri Lanka, Myanmar, and Kashmir, as well as the more modern...deposit in Montana, USA (360 to 325 Ma, Ar–Ar phlogopite [21]), are referred to as “non-classical” [4]...to represent a deposit near Ampanihy, Toliara Province in southwestern Madagascar (George Harlow, pers...AD095 1–5 : 1 Madagascar (MDG) Myanmar (MMR) Sri Lanka (LKA) Andilamena/Andrebabe (NE), 2 Ilakaka (S) |  | | Journal (article/letter/editorial) | | bimineralic assemblage was completely replaced by phlogopite and Mg-Al minerals, thereby producing corundum-...granulite facies conditions (Highland Complex of Sri Lanka: Silva & Siriwardena, 1988; and the Fort Dauphin-Anosyan...in the development of spinel-, sapphirine- and phlogopite-bearing highvariance assemblages. GEOLOGICAL...located in the Androyen Group, which makes up the central and eastern parts of the terrane and represents...deformation (D2: c. 530–500 Ma) led to the development of north–south-trending crustal-scale steep shear zones (Ampanihy |  | | Journal (issue) | | Prospectors' Guide Map to the Gem Deposits of Sri Lanka C. B. Dissanayuke and M.S . Rupasinghe Two Treated-Color...Linda Kay Partney, Marathon, FL; Roy J. Pasini, North Olmsted, OH; Dipesh S. Pattni, Loughborough, Leicestershire...CA; John Stennett, Temple, TX; Clifford Steve, North Kingstown, RI; Clifford H. Stevens, Gansevoort,...of metamorphic origin (from localities such as Sri Lanka, Myanmar, Please see LETTERS, p. 226 Figure B...makes a particularly grand impression, while the central design offers hints of the exotic East. Photo courtesy |  | | Journal (article/letter/editorial) | | 1–420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classification scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions — the importance...deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...numerous and in this context some studies from Central Europe may be quoted as representative of this...on fossil fuels, ore and industrial minerals in Central Europe two separate approaches have been taken | | | Journal (article/letter/editorial) | | 1–420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classification scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions — the importance...deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...numerous and in this context some studies from Central Europe may be quoted as representative of this...on fossil fuels, ore and industrial minerals in Central Europe two separate approaches have been taken |  | | Journal (issue) | | JOURNAL OF THE GEMOLOGICAL INSTITUTE OF AMERICA Sri Lanka: Where Tradition and Technology Meet Characteristics...Tomorrow 173 Duncan Pay FEATURE ARTICLES 174 Sri Lanka: Expedition to the Island of Jewels Andrew Lucas...Pedro Padua pg. 175 Offers a firsthand look at Sri Lanka’s mining, cutting, jewelry manufacturing, and...colored stones. 228 Nephrite Jade from Guangxi Province, China Zuowei Yin, Cui Jiang, M. Santosh, Quanli...article in this issue examines the revitalization of Sri Lanka’s gem and jewelry industry, achieved by combining |  | | Journal (issue) | | Branch Chairmen: Midlands Branch: D.M. Larcher, North-West Branch: I. Knight Examiners: A. J. Allnutt...Alberta, Canada Fig. 1. The Kingdoms of Pagan in central Myanmar go back almost to the beginning of the...positions of the diamond and jade deposits in the north, through the corundum deposits in the Mogok area...he was asked to survey and report on the mining district by the concessionaires. The map he produced at...andalusite from MST, unconfirmed.) Legend: 1 Mandalay District, 2 Shan State, 3 Kachin State, 4 Sagaing State |  | | Conference Proceedings | | Henry A. Hänni, Switzerland; Mr. Gamini Zoysa, Sri Lanka; Dr. Karl Schmetzer, Germany; Prof. Dr. Emmanuel...(1979), Kashiko-Jima, Japan (1981), Beruwela, Sri Lanka (1983); Sydney, Australia (1985); Rio de Janeiro...Norway, Russia, Singapore, South Africa, Spain, Sri Lanka, Switzerland, Sweden, Tanzania, Thailand, U.S...Chen Yanyu, Arūnas Kleišmantas: Spinels from Sri-Lanka. 11 36 th IGC 2019 – Nantes, France Co nference...Chanmuang N. , E. Gamini Zoysa : Ekanite from Sri-Lanka : what can we learn from a radioactive gemstone |  | | Book | | pigeon's-blood rubies are pried from both soil and central government control. Marvel over India's maharajahs...finest star ruby on public display. A product of Sri Lanka's gem gravels, today it resides at the Smithsonian...origin is uncertain, but probably emanates from Sri Lanka. Today it rests in New York's Amer1can Museum...ndwns 465 Bibliography-Montana 469 North Caroli na 472 Bibl iography- North Carolina 472 Bibliography- O ther...473 History 474 Luc Yen 474 Quy Chau (Bu Khang District) 475 Other Vietnam corundu.n1 localities 478 Mining |  | | Journal (article/letter/editorial) | | are common to the Hagendorf-Pleystein Pegmatite Province, SE Germany, and present in many ensialic orogens...a rather conflicting view of this part of the Central European crust (Dill, 2018). Therefore some open...geodynamic situation of this crustal section in Central Europe has been given by Matte (2001), von Raumer...(2007) and Klemd (2010). The lithology of the Central European Variscan basement is rather complex covering...during the Devonian in the Variscan Orogen in Central Europe Since its metamorphic regime it went through |  | | Journal (issue) | | glass known as “fire obsidian,” found only in central Oregon. The front cover features a 110.78 ct (41...trace element concentrations were recorded along a central transect (sample 17407124), nickel, lithium, beryllium...Kawaguchi, and Pham Minh Augite from Dong Nai Province in Vietnam occurs as xenocrysts hosted by Cenozoic...dealer noted that they were mined in Dong Nai Province and initially mistaken for diopside and tourmaline... We began our study in the center of Dong Nai Province (figure 2), where we collected a large quantity |  | | Book | | shales, hornfels and granites of the Harzburg district, showed that the amount of boron decreases from...continental crust, the "reverse overlap" of the north-western anorogenic granites upon the older granite...bronzite. In contrast, ring intrusions have a central body dunitic in composition (see Augustithis, 1965...attaining veinform character, consisting usually of central spinel and marginal ilmenite (Figs. 291 and 292)...patterns shown in Fig. 325. Fig. 325 shows sphalerite central zones free from ex-solutions and outer zones with |
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