 | | Journal (article/letter/editorial) | | BEDS OF SRI LANKA NAWARATNE Department of Geology,Universityof Peradeniya,Peradeniya,Sri Lanka Even...Even thoughthe occurrenceof gold in Sri Lanka has been mentioned in chronicles of historical im- portance...confirmedby the officersof the Mineral Surveyin the Sabaragamuwa, centraland western provinces(Ceylon Administration...p. 57), showsthe known occurrences of gold in Sri Lanka. The area under considerationis a very rugged...mountainous regionin the southeastern part of Ratnapura (Fig. 1). Figure 2 showsthe detailedgeology of |  | | Journal (article/letter/editorial) | | of Beryllium and Fluorine in the Gem Fields of Sri Lanka M. S. Rupasinghe 1, A. Banerjee 1, j. Pense 1...Peradeniya, Sri Lanka Abstract. A study of the abundance of Be in the gem sediments of Sri Lanka shows that...pegmatites of the Highland and Southwest Groups of Sri Lanka, very little decomposition of the Be-bearing minerals...granites and pegmatites of the Precambrian of Sri Lanka are presumed to have been formed due to the magmatic...rocks abundant in the main gem bearing areas of Sri Lanka. Fluorine is found in the range of 400-2,000 ppm |  | | Journal (issue) | | Number 2 TABLE OF CONTENTS FEATURE ARTICLES 62 Sri Lanka: The Gem Island Peter C. Zwnan The Identification...a n y fine gemstones found on the island o f Sri Lanka, the subject of Peter Zwaan's article i n this...this issue. This fine 9.57-ct cabochon from Sri Lanka is pictured here against a 19th century lithograph...not of the publishers. SRI LANKA: THE GEM ISLAND By Peter C. Zwaan Sri Lanka, formerly Ceylon, remains...mined by primitive methods. In many instances, the Sri Lankan origin of the gemstone can be determined by |  | | Journal (article/letter/editorial) | | ratios to gem exploration in the granulite belt of Sri Lanka S.J.K. Gamage a, M.S. Rupasinghea and C.B. Dissanayake...Road, Kandy, Sri Lanka bDepartrnent of Geology, University of Peradeniya, Peradeniya, Sri Lanka (Received...ratios to gem exploration in the granulite belt of Sri Lanka. J. Geochem. Explor., 43:281-292. The geochemical...and strontium in the central granulite belt of Sri Lanka, where many of the gem deposits are found, was...exploration. INTRODUCTION The gem minerals of Sri Lanka have attracted the attention of mineralogists |  | | Book | | extensive native plantations in the Northern Province, especially in the Jaffna Peninsula and the outlying...and December, the rainy season of the Northern Province. Sugar or “jaggery ” is prepared from sweet toddy...stone inthe Western Province, or of tamarind wood in the North-Central Province; in this a heavy pesile...to one family of ivory workers in the Kegalla District. The little figures of the last King of Kandy...Chief Priest are said to be contemporary portraits. Sri Wikrama Raja Sinha was the last king of the Suluwansa |  | | Journal (issue) | | (Brazil and Colombia), central and southern Asia (Sri Lanka, India, Afghanistan, Pakistan, Russia, and China)...nephrite], opal, peridot, quartz, spinel, tanzanite, topaz, and tourmaline). Locality information is both summarized...come from a number of sources, but predominantly Sri Lanka. Accented with smaller diamonds, the 129 gem corundums...demand when large quantities of irradiated blue topaz created an inexpensive alternative during the 1980s...Boehm, March 1993. the alluvial gem fields of Sri Lanka and the pegmatite districts of Brazil. Efforts |  | | Journal (issue) | | (such as beryl, diamond, garnet, spodumene and topaz). They are rarely observed in synthetic gem materials...management in Sri Lanka P.G.R. Dharmaratne National Gem and Jewellery Authority, Colombo 3, Sri Lanka ABSTRACT:...accessing alluvial gem gravels (known as illama) in Sri Lanka for the extraction of gemstones, such as open...restoration of mined-out lands. The lessons learned by the Sri Lankan gem industry, with centuries of experience...the environment in which we live. Introduction Sri Lanka has been identified as one of the earliest sources |  | | Journal (issue) | | instrumentation such as LA-ICPMS—once primarily the province of academia—became a fixture in many gemological...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...addition to the traditional spinel sources of Sri Lanka, Pakistan, and Myanmar (spinel, if polished elsewhere...start operations at the Kagem mine in the Kafubu District, historically Zambia’s largest source of emeralds...ultimately decided in eBay’s favor when the U.S. District Court of New York determined that the burden of |  | | 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 (article/letter/editorial) | | in stream sediments of a granulite terrain in Sri Lanka — evidence for a mineralized belt Rohana Chandrajith...Geology, UniÕersity of Peradeniya, Peradeniya, Sri Lanka Received 17 March 1999; accepted 11 May 2000 ...located in a high-grade metamorphic terrain of Sri Lanka have been analysed for their major and trace element...Stream sediment; Geochemistry; Walawe Ganga Basin; Sri Lanka 1. Introduction ) Corresponding author. Fax:...Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Buttala, Sri Lanka. The Walawe Ganga ŽGanga |  | | Journal (issue) | | earrings, a 10 ct asteriated diamond and pieces of topaz fashioned to look like diamond crystals. ‘World...on the road leading to the Spitzkoppe beryl and topaz area in west-central Namibia. At first glance the...Cairncross B., Campbell I.C. and Huizenga J.M., 1998. Topaz, aquamarine, and other beryls from Klein Spitzkoppe...supplier, the fluorite was mined from Cao Bang Province, northeast of Yen Bai. The crystal surfaces were...29.05 ct fluorite is reportedly from Cao Bang Province in northern Vietnam. Photo by Bilal Mahmood. |  | | Book | | notable example in this category is the Nuristan District of Afghanistan, which over the past 10 years has...Saijo, Iyo Province, Ehime Prefecture, Island of Shikoku Ashio Mine, Shimotsuke Province, Tochigi Prefecture...Arakawa Mines, Ugo Province, Akita Prefecture, Honshu The Obira Mine, Bungo Province, Oita Prefecture,... Hyuga Province, Miyazaki Prefecture, Kyushu Otome Mine, Suisho Pass, Kurobera, Kai Province, Yamanashi...Prefecture, Honshu Mino Province, Gifu Prefecture, Honshu; and Omi Province, Shiga Prefecture, Honshu |  | | Journal (issue) | | Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic...more about the age and origin of sapphires from two Sri Lankan alluvial deposits. Next, a team headed by...the 2017 news of sapphires from northern Tigray Province, prompted a 2018 GIA field expedition. Led by...minerals of the Southern California pegmatite province. Rocks & Minerals, Vol. 86, No. 1, pp. 14–35,...Brazil: the tourmalines of the Governador Valadares district. G&G, Vol. 21, No. 2, pp. 86–104, http://dx.doi |  | | Journal (issue) | | Benton & S. Avella 83 Euhedral sinhalite from Sri L a n k a .........................................hydrated oxide and associated niobian rutile from Topaz Valley, Utah......................................Euhedral sinhalite crystals, reported here from Sri Lanka fo r the first time, have yielded morphological...minerals found in the alluvial gem deposits of Sri Lanka. It was first recognized and described as a new...(1961) noted sinhalite from Eheliyagoda in Sabaragamuwa Province. Gunawardene and Rupasinghe (1986) in cluded |  | | Book | | Enterprise as carried on, chiefiy in the Sabaragamuwa district; to the splendid opportunity presented for...round off the list of precious things for which Lanka and Serendib have been famous from time immemorial...Ceylon 64, 106 Baker, Sir S., on ... 31, 128, 139 Balangoda Beligal Korale 18, 24, 26, 33 ... Belihuloy a...Garnet. 29, 30, 97, 125, 141 Gem Searching in Sabaragamuwa. Ill, 119 Gems in Ceylon ...12, 26, 59, 67,...Ramboda ... ... ... ... 140 Rangala ... .2, 31, 104 Ratnapura 7, 28, 45, 59, 106, 128. 140 Report on Gold in |  | | Journal (issue) | | ISSN: 0022-1252 J. Gemm., 1992, 23, 1 20 The Sri Lankan ruby: ruby: fact fact or orfable? fable? Ai...Aiahroof M.M.M. Mahroof Colombo, Colombo, Sri Sri Lanka Lanka Sri Lanka, or Ceylon as it was called until 1972...a hiatus in the Sri Lankan gem story. As I have written elsewhere: 'While Sri Lanka has had a good press...among those who had written, often admiringly, of Sri Lankan text writers writers like like Herbert Herbert...Anderson deal deal (and his his subsequent (and with Sri Sri Lankan Lankan gems gems more more as as aa class |  | | Journal (article/letter/editorial) | | Sediment Geochemistry of the Walawe Ganga Basin of Sri Lanka - Implications for Gondwana Mineralization Rohana...Geology, University of Peradeniya, Peradeniya, Sri Lanka * Corresponding Author (Manuscript received September...western-part of the Walawe Ganga (river) Basin in Sri Lanka is represented in this paper. The river basin...Walawe Ganga Basin, Sri Lanka. Introduction More than 90% of the island of Sri Lanka is made up of amphibolite...(1994) revised the subdivisions of Precambrian Sri Lanka based on the geochronological, petrological and | | | Journal (issue) | | Benton & S. Avel/n 83 Euhedral sinhalite from Sri Lanka ............................ 91 by L. C. Pit/lln11...hydrated oxide and associated niobian rutile from Topaz Valley, Utah...................... 123 by E. £....Mure-Ii-April /995 EUHED RAL S INHALI TE CRYSTALS FROM SRI LANKA v�v Lawrence C. Pitman, Cornelius S. Hu rlbut...Euhedral sinhalite crystals, reported here ji·om Sri Lanka for the first time, have yielded mo,phological...minerals found in the alluvial gem deposits of Sri Lanka. It was first recognized and described as a new |  | | 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...in Sri Lanka for which the nature of the primary deposits is still unknown. Except for Sri Lanka, Image |  | | Journal (issue) | | Gemesis CVD synthetic diamond New sapphires from Sri Lanka Cultured pearls from Micronesia VOLUME 48 NO...Sapphires from Thammannawa, Kataragama Area, Sri Lanka Pannipitiye G. R. Dharmaratne, H. M. Ranjith Premasiri...the object of a recent gem rush in southeastern Sri Lanka, possess good transparency and a pure blue color...sapphire • Blue sapphire discovery near Kataragama, Sri Lanka • Sapphire and ruby carvings from Vietnam • Color...timely features on a recent sapphire rush in Sri Lanka and the emerging Micronesian cultured pearl industry |  | | Journal (issue) | | collection, page 105; Brown Topaz- Barry and Beth Kitt collection, page 150; Blue Topaz-Lyda Hili collection...scalenohedral calcite crystals. The Terlingua mercury district, with a few smaller, adjacent districts in Texas...in cavities in the limestone of the creek bed. Topaz In 1904, between the small central Texas towns of..."heavy quartz" in a stream bed. lt proved to be topaz from a Precambrian pegmatite cutting coarse-grained...thereabouts, known geologically as the Llano Uplift. Fine topaz crystals continued to come from the area for most |  | | Journal (issue) | | TECHNIQUES 159 Inclusions in Taaffeites from Sri Lanka , Mahinda Gunawardene 163 ~ a ~ n e tProperties...NEW TECHNIQUES INCLUSIONS IN TAAFFEITES FROM SRI LANKA By M a h j n d a G u n a w a r d e n e This article...mineralogical study of inclusions i n taaffeites from Sri Lanka, with photomicrographs of some of the most characteristic...genesis of taaffeite is discussed. Taaffeitesirom Sri Lanka, China, the USSR, Australia, and even Burma have...reported is believed to be of Ceylon (now called Sri Lanka] origin (Anderson et al., 1951; Anderson, 1968) |  | Voudouris, Panagiotis, Mavrogonatos, Constantinos, Graham, Ian, Giuliani, Gaston, Melfos, Vasilios, Karampelas, Stefanos, Karantoni, Vilelmini, Wang, Kandy, Tarantola, Alexandre, Zaw, Khin, Meffre, Sebastien, Klemme, Stephan, Berndt, Jasper, Heidrich, Stefanie, Zaccarini, Federica, Fallick, Anthony, Tsortanidis, Maria, Lampridis, Andreas (2019) Gem Corundum Deposits of Greece: Geology, Mineralogy and Genesis. Minerals, 9 (1) 49 doi:10.3390/min9010049 | Journal (article/letter/editorial) | | southern Madagascar, East Africa, South India and Sri Lanka; those related to the Himalayan orogeny mostly...advanced argillic lithocap comprising diaspore, topaz, pyrophyllite and alunite supergroup minerals [31]...sapphires (e.g., Ilakaka/Madagascar and Ratnapura Balangoda/Sri Lanka), subparallel to the so-called Kashmir...trends of Mogok and of Pailin, Ilakaka and Ratnapura Balangoda, the Umba and Kashmir trends of Kashmir metasomatic...low-Fe sapphires of Pailin, Ilakaka and Ratnapura Balangoda, the Umba and trends of sapphires, andblue |  | | Journal (issue) | | April2000 2000 April ' SriLankan Lankan 'f^ ^ < Sri gemdeposits deposits ; . gem LW NwwTN » ., GEPOL...Okkampitiya Okkampitiya gem gem field, field, Sri Sri Lanka Lanka 1 1 2 V. V.Mathavan Mathavan 1, , S.S.T....University University ofofPeradeniya, Peradeniya,Sri SriLanka Lanka 2.2.Institutfur Institut für Geowissenschaften...situated in in south-eastern south-eastern Sri Sri Lanka. Lanka. These These are are (1) (1) the the gem-bearing...deposit Introduction Introduction S riri Lanka, Lanka, well well known known for for its its wide |  | | Journal (issue) | | occur in the John Saul ruby mine, Taita-Taveta District, Kenya (Simonet, 2000) which is located just north...change to green by heating of red corundum from Sri Lanka, and reversion to red by cooling. Thermochromy...of four green tourmalines from the Taita-Taveta District, Kenya. For the present study, the contents of...2000. Geology of the Yellow Mine (TaitaTaveta District, Kenya) and other yellow tourmaline deposits in...deposits in the Isalo area of Madagascar, from Ratnapura, Sri Lanka and from Mogok, Myanmar, a nearly complete |
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