 | | Report (issue) | | Sinhalite MgAlBO4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point...8819(5) c = 5.6813(4) Z=4 X-ray Powder Pattern: Sri Lanka. 2.14 (vvs), 1.621 (vs), 3.24 (s), 2.62 (s), 4...43 2.10 29.24 31.96 [100.95] 100.00 (1) Sri Lanka; corresponds to Mg1.02 (Al1.03 Fe3+ 0.03 )Σ=1...Distribution: From Sri Lanka, in gem gravels, in the Ratnapura district, at Nivitigala, Balangoda, Nirialla;...Ontario, Canada. From the Kwakonje area, Handeni district, Tanzania. In the Tayozhnoye iron deposit, 550 |  | | Book | | Edelseifen um Ratnapura . . . . . . . . . . 22 Lageskizze der Edelsteinfelder in der Provinz Sabaragamuwa Ceylons...Polonnaruwa • Kandy Nuwara Eliya Adam's Peak Ratnapura • .Pelmadulla • Rakwana Malara Karte von Ceylon...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 |  | | 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) | | Mitchelltree, L. D. Benton & S. Avella 83 Euhedral sinhalite from Sri L a n k a .................................Massachusetts 02138 Euhedral sinhalite crystals, reported here from Sri Lanka fo r the first time, have...are attributed to ferric iron. INTRODUCTION Sinhalite, MgAlB04, is among the rarest of the 30 or so...minerals found in the alluvial gem deposits of Sri Lanka. It was first recognized and described as a new...1952). Gubelin (1961) noted sinhalite from Eheliyagoda in Sabaragamuwa Province. Gunawardene and Rupasinghe | | | Journal (issue) | | L. D. Benton & S. Avel/n 83 Euhedral sinhalite from Sri Lanka ............................ 91 by L....Mure-Ii-April /995 EUHED RAL S INHALI TE CRYSTALS FROM SRI LANKA v�v Lawrence C. Pitman, Cornelius S. Hu rlbut...Massachusetts 02 1 38 Euhedral sinhalite crystals, reported here ji·om Sri Lanka for the first time, have yielded...are attributed to ferric iron . INTRODUCTION Sinhalite. MgAIBO.,. is among the rarest of the 30 or so...minerals found in the alluvial gem deposits of Sri Lanka. It was first recognized and described as a new |  | | 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 |  | | 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) | | serpentinized harzburgite WSW of Hazarganji, Khuzdar District, SW Pakistan. The mineral occurs as acicular,...literature about heat treatment of geuda stones from Sri Lanka (e.g. Nassau, 1984; Ediriweera and Perera, 1989;...(1942) from the type locality in the Johachido District, Kisshu County, Kankyo Hodu Hodu Prefecture, North...the sinhalites are are probably from from Sri Lanka. Lanka. Photograph by F. F. Greenaway. Greenaway...1s (OH, F) 3L known is sinhalite [MgAlB041 [MgAlBOJ (see Figure 5). 5). Sinhalite of gem quality comes |  | | 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 |  | | Journal (issue) | | and from historical gemmology in Afghanistan, Sri Lanka or the UK to the criteria for distinguishing natural...the Chuncheon area, north east of Seoul, in the Province of Kangwondo, which is in the central part of...light, similar to those from Sri Lanka. The key difference between Burma and Sri Lankan sapphires is saturation...specimens are known, including a 40.3kg crystal from Sri Lanka which contains gemmy portions (see Table II)....Louis XIV. Said to be Bengal; probably Burma or Sri Lanka Date unknown Museum National D'Histoire Naturelle |  | | Journal (issue) | | 1983); therefore, in spite of of its better from Sri Lanka, show X-ray diffraction diffraction data which...reliableidentificaidentification.localities in Sri Lanka, and also from at least one diffraction seems...tion. locality in Burma (Spengler, 1983). In Sri Lanka refractive a zincian variety with relatively high...1 'taaffeite' and whose origin was thought to be Sri Around of about This stone is rather (0.30ct in red...weight was sold as c'red taaffeite' to Dr Dr E. Lanka. This rather small (0.30ct weight) and its colour |  | | 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 |  | | Book | | pyrochlore) and zircon crystals are common in Sri Lanka gemstones. The more important syngenetic mineral...mica in andalusite, chrysoberyl, kornerupine and Sri Lanka sapphire • calcite in Burmese ruby and spinel;...andalusite • sphene in ruby and spinel • uraninite in Sri Lanka sapphire • zircon in corundum. Apatite is a characteristic...well seen in some green and brown zircon from Sri Lanka. The process is called ‘metamictization and the...complex patterns, especially in sapphires from Sri Lanka. Burmese ruby contains short rutile needles, calcite | | | Book | | pyrochlore) and zircon crystals are common in Sri Lanka gemstones. The more important syngenetic mineral...mica in andalusite, chrysoberyl, kornerupine and Sri Lanka sapphire • calcite in Burmese ruby and spinel;...andalusite • sphene in ruby and spinel • uraninite in Sri Lanka sapphire • zircon in corundum. Apatite is a characteristic...well seen in some green and brown zircon from Sri Lanka. The process is called 'metamictization' and the...complex patterns, especially in sapphires from Sri Lanka. Burmese ruby contains short rutile needles, calcite |  | | Journal (issue) | | in Colorless, Yellow, and Blue Sapphires from Sri Lanka Kcirl Scl~metzerand Olaf Medenbach REGULAR FEATURES...Banjarmasin-Martapura area of southeastern Kalimantan (the province of Kalimantan Selatan). The gemological characteristics...map shows the two major areas (left the Landak district of western Kali= man tan, below = the Bmjarn~asin-Maitapura...000 guilders worth of diamonds from the Landak district in what is now western Kalimantan. The 367-ct...Banjarmasin, the capital city of Kalimantan Selatan province. In GEMS & GEMOLOGY Summer 1988 this area |  | | 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...spectra of chrysoberyl, alexandrite, peridot and sinhalite. Am. Mineral., 50, 1972-81 Fiala, J., 1965. Pyrope...2000. Geology of the Yellow Mine (TaitaTaveta District, Kenya) and other yellow tourmaline deposits in |  | | Journal (issue) | | mineral inclusions without specific orientation Sri Lanka aquamarine six-rayed thin fluid films on planes...different localities in Brazil as well as from Sri Lanka and Madagascar 1,740,11,12,13,14,15. Microscopic...of a heat-treated natural yellow sapphire from Sri Lanka with E perpendicular to c-axis (o-ray, black)...Sapphires of this group originate for example from Sri Lanka. The spectrum E (the electric vector of light)...identical to those of natural yellow sapphires from Sri Lanka, while Mg by itself stabilizes another kind of |  | | Journal (issue) | | Branch: M. P. Gayton, F.G.A. South Yorkshire & District Branch: 1. R. M. Lewis, F.G.A. Examiners: B. W...locality and from the placer deposits near Ratnapura, Sri Lanka. Garnets from this series, containing small...Umba Valley but were also described from Ratnapura, Sri Lanka. A distinction of members of the pyrope-spessartite...that Thai dealers were appearing in Colombo, Sri Lanka, in search of a type of milky white corundum that...is reported to be typical of the Ootu Mine in Sri Lanka. The explanation has to be that the stones were |  | | Journal (issue) | | inclusions. СgophоtolиmiпеsceRе (77К). Liaonin Province, China. Specimen: Yana Baa. (right) Photoluminescence...crystal (about З т т across) with vacuoles. Liaonin Province, China, Specimen: Yana Bao. (left) Laser luminescence...vacuoles and mineral inclusions (10'). Liaonin Province, China. Specimen: Boo Yana. (left) Luminescence...found among the Chinese crystals from the Liaonin Province, Northeastern China (samples of these crystals...offtne (0.5 mu across) diamond crystals. Liaonin Province, China. Specimen: Yana Boo. Phosphorescence of |  | | Book (edition) | | extensive fields in the prophetically named Kimberley district of Western Australia promise to be of world importance...cause raised eyebrows, and even more so with ‘Sri Lanka rubies and sapphires’ in place of ‘Ceylon rubies...intermediate and acid members of the volcanic province in southern Brazil and Uruguay, and the fire opals...is in such old river courses in countries like Sri Lanka and Thailand that the water-worn pebbles of many...particularly in the Yun Yang deposit in Hubei Province, China. For many years on the basis of experimental |  | | Journal (issue) | | a particular species, e.g. Burma (Figure 7), Sri Lanka, Vietnam, Brazil. Designation of origin, therefore...red or brown and even in black or grey, but most Sri Lankan moonstones are colourless and transparent...or white and translucent. The blue sheen in some Sri Lankan moonstones is well known (Spencer, 1930) and...few years in Table I. Moonstone qualities of Sri Lanka with different body colours and sheens Moonstone...on a bank of the river Walawe Ganga in south Sri Lanka © Copyright the Gemmological Association ISSN: |  | | Book | | 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...473 History 474 Luc Yen 474 Quy Chau (Bu Khang District) 475 Other Vietnam corundu.n1 localities 478 Mining...History 390 Ruby & sapphire variecies 395 Origin of Sri Lanka's corundum deposits 395 Mining areas 396 Mining...marker in Sri Lanka 399 Characteristics of Sri Lanka.n corundLm1s 402 Bibliography- Sri Lanka 405 C Ruby |  | | Journal (volume) | | stone of lower Franceville formation, in the province of Upper Ogooue on the road between Franceville...reland. But finer gems ore brought from the granite district of Nertschinsk, in S i b e r i a , a n d a l so...Peruvians obtained many emeralds from the barren district of Atacama, and in the times of the Conq uest...which Pliny and others mention. I n the Wa ld district magn ificent crystals hove been found embedded...the center of the gem handling industry, is Ratnapura, or "City of Gems." From an area of about 800 |  | | Catalog/List | | Internet, Fax, and Mail) Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Session...Collection LOT VIEWING Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Wednesday...Mine (Apex-Dixie Mine), Jarvis Peak, Tutsagubet District, Beaver Dam Mountains, Washington County, Utah...Quarry, Jalgaon, Dindori (Dhindori), Nashik District (Nasik District), Maharashtra, India As straightforward...WULFENITE Shaft 11, Touissit, Touissit District, Oujda-Angad Province, Oriental Region, Morocco This is just |  | | Book (volume) | | Drosdov and A.P. Turinge 331 Gems deposits of Sri Lanka E. Gaminee Zoysa 343 Precious and semi-precious...formation were found in Mimecha-Kotui carbonatite province. This deposits are not mining yet for their difficult...modern quartz sand from iron in Pinar-del-Rio province, Cuba. Quartz sand places on the lowland derived...operation in Khingan brucite =magnesite= bearing province, Khabarovsk Territory, USSR. There are small brucitite...part in the Khingan brucite =magnesite= bearing province within Bureinskii old massif . The Amurskaya (presumably |
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