 | | Report (chapter) | | from the Rakwana area in the Ratnapura (Sinhalese: ‘city of gems’) District, in the Sabaragamuwa Province...Province of Sir Lanka (formerly Ceylon). Baddeley then submitted these samples to Mr Pringle of the Museum...This is clearly one of the better samples from Rakwana, Ceylon and shows some crystal faces from which...geikielite is Rakwana, Ratnapura District, Sabaragamuwa Province, Sri Lanka, a gem-mining district (Back 2018)...2018). Sabaragamuwa Province in Sri Lanka is, in fact, the centre of gem mining in Sri Lanka. Archean |  | | 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) | | Laboratory', but many gemmologists make the journey to Sri Lanka or Thailand at least once in their lives, if not...observations on brown tourmalines from Elahera, Sri Lanka Ulrich Henn and Martin Schramm Institut für...description of brown tourmalines from Elahera, Sri Lanka. They were classified as uvite and dravite as...deposits are located in the Uva region, in the Ratnapura district and in the Tissamaharma area (Dunn, 1977...(1977) classified the brown tourmalines from Sri Lanka as uvite and dravite: Results For the analyses |  | | Journal (article/letter/editorial) | | processes. The charnockites of the Highland Group of Sri Lanka represent this type and show genetic relationships...aluminous metasediments such as those found in Sri Lanka result in the formation of an assemblage of gem...charnockitic parent. 1. I n t r o d u c t i o n Sri L a n k a is well k n o w n for its s e d i m e n...Department of Geology, University of Peradeniya, Sri Lanka. 0009-2541/85/$03.30 fore the source r o c k...d y o f the origin o f the g e m s t o n e s o f Sri L a n k a was m a d e b y Munasinghe and Diss a n |  | | Journal (article/letter/editorial) | | THE ORIGIN OF GEMSTONES TISSA MUNASINGHE OF SRI LANKA AND C. B. DISSANAYAKE Department of Geology...Geology, University of Peradeniya,Peradeniya,Sri Lanka Sri Lanka is well known throughout the world for its...Largescale gem mining is confined mainly to the Ratnapura and Elahera areas (Fig. 1). In most local- ities...(Dahanayake et al., 1980). The gem-bearing beds in the Ratnapura area are mostly alluvial in origin and consist...1217 (1972a), the origin of the gemstonesof Sri Lanka has not been considered in any detail. It is the |  | | Book | | Edelseifen um Ratnapura . . . . . . . . . . 22 Lageskizze der Edelsteinfelder in der Provinz Sabaragamuwa Ceylons... Kandy Nuwara Eliya Adam's Peak Ratnapura • .Pelmadulla • Rakwana Malara Karte von Ceylon I.TEIL...altorientalisches Dichterwort die paradiesische Insel Lanka an der Siidspitze Indiens. Es hat bis heute seine...von Edelsteinen wie gerade Ceylon.Bereits in den Lanka-Sagen finden sich manche Hinweise auf Ceylons Edelsteinreichtum...ausser Gewiirzen auch Perlen und edle Steine aus Lanka, wie Ceylon im Altertum hiess, exportiert wiirden |  | | Report (issue) | | 01 (3) 33.54 Total 100.28 99.7 100.00 (1) Sri Lanka. (2) Bergell zone, Switzerland/Italy; by electron...Association: Rutile, spinel, clinohumite, perovskite, diopside, serpentine, forsterite, brucite, hydrotalcite...calcite. Distribution: From the Rakwana and Balangoda districts, Sri Lanka. At Baltistan, Kashmir, Pakistan...Kimberley, Cape Province, South Africa. From north of the Mahogany mine, Hartley district, Zimbabwe. Several |  | | Journal (issue) | | (Brazil and Colombia), central and southern Asia (Sri Lanka, India, Afghanistan, Pakistan, Russia, and China)...come from a number of sources, but predominantly Sri Lanka. Accented with smaller diamonds, the 129 gem corundums...gems (i.e., apatite, benitoite, charoite, chrome diopside, feldspar, iolite, lapis lazuli, maw sit sit,...Boehm, March 1993. the alluvial gem fields of Sri Lanka and the pegmatite districts of Brazil. Efforts...Asia (Thailand, Cambodia, Myanmar, Vietnam, and Sri Lanka; again, see figure 1). Although mining continued |  | | 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 (issue) | | 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. ...yellow-green grossular from Kambanga, Taita-Taveta District, Voi, Kenya, is notable for having a significantly...at the Tourmaline Queen mine, also in the Pala District (e.g. Larson, 2012). So far, approximately three...2011. Recent finds at the Oceanview mine, Pala District, San Diego County, California. Rocks & Minerals |  | | 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) | | 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) | | 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) | | Prospectors' Guide Map to the Gem Deposits of Sri Lanka C. B. Dissanayuke and M.S . Rupasinghe Two Treated-Color...of metamorphic origin (from localities such as Sri Lanka, Myanmar, Please see LETTERS, p. 226 Figure B...society, were Bahrain in the Persian Gulf, Ceylon (now Sri Lanlza), and Australia. Freshwater pearls came from...sapphires were coming from Kashmir (figure 71, Ceylon (Sri Lanlza), Australia, and the U.S. The American ' N...Gemstone Resources of China The Changma Diamond District, China Gemstone Carving in China: Winds ol Change |  | | 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 (article/letter/editorial) | | areas which have been mapped : Ratnapura Sheet (Western half), Rakwana sheet (Western half). Gampaha sheet...presence of the following minerals : hypersthene, diopside, garnet, sillimanite, scapolite, calcite, forsterite...the following essential minerals, hypersthene, diopside, garnet, hornblende, biotite, perthite, plagioclase...z. Hypersthene-diopside-hornblende-perthite-plagioclase-quartz. Hypersthene-diopside-hornblende-biotite(...minerals such as forsterite, phlogopite, spinel, diopside, graphite are commonly present. Mineral assemblages |  | | Journal (issue) | | hematite coating; these are from Leichang. Guangdong Province. C hina. There also were some dark red- purple...with quartz from Uchucchacua Mine, Dos de Mayo Province, Lima Departmet Peru. There were a few speci mens...quartz from Darya Pech area, Nuristan, Kunnar Province, Afghanistan. A Cabinet piece had a I l/2 x 2...new find in Sare Saug. Kokccha Valley, Badakshau Province, Afghanistan . These were some of the best quality...ro s ite fro m the Arrowhead c laim, Slic krock District. Uta h. T hese are of unus ually large crystals |  | | Journal (article/letter/editorial) | | geikielite, spinel, and perovskite in placers of Rakwana, Sri Lanka [1]. Later, this mineral was discovered as... The following certified standards were used: diopside, orthoclase, rutile, Cr2O3, Fe2O3, LiNbO3, ZrSiO4...al. Rt Sri Sri Ilm-I Ilm-I Sri Ilm-II 200 µm (a) 200 µm (b) Rt Rt Urn Rt Sri Sri Ilm-I 20...Sciences. (a–b) Idiomorphic inclusions of srilankite (Sri) in ilmenite-I (Ilm-I) in intergrowths with rutile |  | | Journal (issue) | | Franks, B.Sc., Ph.D., F.G.A. South Yorkshire & District Branch: J. L Platts, F.G.A. Examiners: E. A. Jobbins...GREAT BRITAIN Vol. XIX No. 3 JULY 1984 CHROME DIOPSIDE FROM U.S.S.R. By HANS-WERNER SCHRADER, Dip. Min...University of Mainz, W. Germany. A lot of chrome diopside stated to be from an occurrence in the U.S.S.R...synthetic flux crystals (see Figures 1 and 2). Diopside, CaMg(Si 2 0 6 ), is a member of the pyroxene...end of the continuous crystalline solution of diopside—hedenbergite (CaFe(Si 2 0 6 ) caused by the diadochy |  | | Journal (article/letter/editorial) | | Anamaduwa, Galgarnuwa, Wilgomuwa, Hembarawa and Rakwana areas are described. These dykes and veins show...Tonigala Granite in the west, from the Colombo District, and from the Wilgomuwa-Sorabora-Hembarawa area...metasediments of the Khondalite Group of the Rangala and Rakwana areas are also given (Fig. 1). 2. MACROSCOPIC...section from a quarry at Kaduwela in the Colombo District (Fig. 3) the country-rock of biotite granite gneiss...In Pattiwila quarry, Kelaniya, in the Colombo District (Fig. 5D), a large pegmatite cuts obliquely across |  | | Journal (issue) | | not changed colour. The other stones are from Sri Lanka and are not treated; they weigh 9.85 ct (green)...mine, Kha district Looi mine, Kha district Looi mine, Kha district Looi mine, Kha district Notes Natural...mine, Kha district Finest. Only white after initial heating 6 7 Various, Champasak district Various...Champasak district 8 9 Various, Champasak district Pailin district 10 11 12 Looi mine, Kha district Looi...Looi mine, Kha district Various, Champasak district White stones after full heating Pre-heated to facilitate |  | | Book | | A CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in...Localities Canada: Cobalt mining district and Thunder Bay District, Ontario. USA: several localities... Wire silver, Silver Islet Mine, Thunder Bay District, Ontario, Canada * 11.5 x 14x 11 om Silver has...xe2e0x Gem Copper, New Cornelia (Ajo) Mine, Ajo district, Arizona, USA 6 Keo lecm LEFT: Au (China, Eastern |  | | Journal (article/letter/editorial) | | granulite-facies coronitic gabbro from the Grenville Province, Ontario, Canada, magmatic baddeleyite and zircon...famous gem gravels from Rakwana, District of Kollonnagam, Ceylon (now Sri Lanka ). He donated one of these...identified in coarse gravel from the Balangoda gem district, Ceylon, several years later (Blake and Herbert-Smith...South Africa, with a bright white baddeleyite-diopside coating [details shown in (B) ]. This grain is...boundary. The black areas in the reaction rim are diopside. Note the irregular reaction boundary. C. Detailed |  | | 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...ruby, emerald, uvarovite, fuchsite and chrome diopside. Carstens (1973) found that his red pyrope with...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 |  | | Journal (issue) | | from Guyana Surface Features of Ekanite from Sri Lanka A Study of Gems from Napoleon III’s Crown A New...EDITORIAL 137 Diamonds from Guyana, Ekanite from Sri Lanka, a New Amber Source in Vietnam, and More... Duncan...characteristics of ekanite from secondary deposits in Sri Lanka. 168 A Gemological and Spectroscopic Study with...0016-626X Diamonds from Guyana, Ekanite from Sri Lanka, a New Amber Source in Vietnam, and More... Welcome...uneven shapes and surface features of ekanite from Sri Lanka. Lutz Nasdala and his team analyze ekanite fragments |
|
