 | | Journal (article/letter/editorial) | | they are the possiblesourcerock for many of the Ratnapura-type gem depositsin this area. The cordierite...sillimanite+ corundum q- sapphirine Fro. 1. The Ratnapura gem area (outlined) in relation to the occurrences...portrayed in the SiO2-A12Oa-MgOtriangle (Fig. 2). Ratnapura-type Gem Deposits Most of the gem fields are...the southwest of the island centered around the Ratnapura valley (Wadia and Fernando,1945, p. 15) in the...wouldaccountfor someof the gem stonesfoundat Ratnapura,as rocks of this nature are thoughtto underlythe |  | | Journal (issue) | | in Myanmar|Blue kyanite from Tanzania|Rainbow moonstone from Malawi|News from the Oceanview mine, Pala... Gem Notes COLOURED STONES Adularia (Including Moonstone) from Austria For decades, gem and mineral collectors...adularescence, and would therefore be considered moonstone. Blauwet loaned two of the larger ovalcut gems...with a slight blue component that is typical of moonstone. The RIs of 1.520–1.530 (birefringence 0.008–0...(Figure 2); similar features are well known in moonstone (e.g. Gübelin and Koivula, 1986). Chemical analysis |  | | 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...hessonile garnet. Spinel, tourmaline, zircon, moonstone, and quartz are also relatively common; they share |  | | Journal (issue) | | ......................................... 47 Sri Lanka ................................................Russia; Sant Enterprises, Thailand; Facets Show, Sri Lanka; Thai Gems and Jewelry Traders Association, Thailand;...Akira Ito, Japan SECRETARIES Ismail M. Kamil, Sri Lanka Jacqui Grande, USA DIRECTORS Andrew Cody, Australia...Namibia; Gamini Zoysa and Ismail Kamil, Colombo, Sri Lanka; TanzaniteOne Ltd.; South Africa; the Thai Gem...Masashi Furuya, Japan; Gem & Jewellery Authority of Sri Lanka; Jewellery Review Magazine, Russia; Prof. Mimi |  | | Journal (article/letter/editorial) | | of Sri Lanka K. Dahanayake Department of Geology, University of Peradeniya, Peradeniya, Sri Lanka The...The island of Sri Lanka is underlain primarily by Precambrian metamorphic rocks belonging to the Amphibole...cordierite gneisses, marbles and pegmatites. L'~le de Sri Lanka est formSe presque entiSrement des roches mStamorphiques...des pegmatites. INT ROD U CTION The island of Sri Lanka (formerly Ceylon) is underlain principally by...gneisses. The major gem fields of Sri Lanka Viz. Elahera and Ratnapura both lie in the Highland Group terrain |  | | 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 |  | Santosh, M., Katori, R., Yoshikura, S., Higash, S., Salim, A.K. (2002) Pink Sapphire from Southern Kerala, S. India: Implications on India-Madagascar Correlation Within Gondwana Assembly. Gondwana Research, 5 (4) 894-901 doi:10.1016/s1342-937x(05)70925-4 | Journal (article/letter/editorial) | | hues also occur in the Ratnapura gem district in the southwestern part of Sri Lanka. The pink sapphire occurrences...pyrope garnets, blue and green apatites, feldspar (moonstone), smoky quartz, amethyst and cordierite, among...similar events recorded from adjacent terrains of Sri Lanka, Madagascar and East Antarctica within the East...and zircon from southern Kerala in South India, Sri Lanka and Madagascar and aquamarine, topaz, tourmaline...southern India and Sri Lanka into East Antarctica also represents a Pan-African gemstone province (Menon et al |  | | 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) | | 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 |  | | Book | | by Surface Waters: 1 5 The Gem Gravels of Sri Lanka 2. Gemstones Formed from Surface Water: 19 ...by surlace waters. The classic gem gravels of Sri Lanka are used as an example of one of these secondary...examined the chapter on alluvial deposits and Sri Lanka. Dr. Ralph Segnit, Chairman of the Committee for...it was most needed. Spectacular photographs of Sri Lanka were provided by Peter Horree of the Netherlands...Concentrated by Surface Waters: The Gem Gravels of Sri Lanka Chapter 2. Gemstones Formed from Surface Water: | | | Book | | by Surface Waters: 1 5 The Gem Gravels of Sri Lanka 2. Gemstones Formed from Surface Water: 19 ...by surlace waters. The classic gem gravels of Sri Lanka are used as an example of one of these secondary...examined the chapter on alluvial deposits and Sri Lanka. Dr. Ralph Segnit, Chairman of the Committee for...it was most needed. Spectacular photographs of Sri Lanka were provided by Peter Horree of the Netherlands...Concentrated by Surface Waters: The Gem Gravels of Sri Lanka Chapter 2. Gemstones Formed from Surface Water: |  | | 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...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...high-quality blue and pink sapphire came from Sri Lanka and, more recently, Madagascar (Suwa, 1999). In |  | | 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 (issue) | | Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic...spinel • Greenland ruby • Hand-carved cameos • Moonstone jewelry • Oregon sunstone • Potentate mine sapphire...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, |  | | 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) | | Stars GEMSTONES DIRECT FROM THE SOURCE 25th Sri Lanka Gem & Jewellery Show Organised By Principal Sponsor...Authority Sri Lanka Export Development Board Official Electronic Security Surveillance Provider Sri Lanka...com Official clearing & Forwarding Agent Sethmill Lanka (Pvt) Ltd SUMMER 2015 ISSUE 29 SUMMER 2015 ISSUE...the Musakashi Area of Zambia ICA Mine Tour in Sri Lanka – In Search of Sapphire and More Gemology 30...Mining - The Final Lap Trends and Jewelry 52 Sri Lanka’s Best-Kept Secret - Its Jewelry-Making Tradition |  | | Book | | Pages 4—5: Magnificent rubies and sapphires from Sri Lanka Photo © Fred Ward 1997 Introduction Asia is...nurture exquisite South Sea pearls. Myanmar and Sri Lanka hold the most dazzling treasure troves of all...diamond, spinel, peridot, apatite, scapolite, moonstone, zircon, garnet, tourmaline, iolite and amethyst...held by the government. The tropical island of Sri Lanka (formerly Ceylon) is commonly known as the “island... spinel, zircon, peridot, topaz, tourmaline, moonstone and a highly-prized chrysoberyl cat’s eye. Gems |  | | 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...Garnet. 29, 30, 97, 125, 141 Gem Searching in Sabaragamuwa. Ill, 119 Gems in Ceylon ...12, 26, 59, 67,..... 64, 81 29, 30, 117, 140 Molybdena »2, 141 Moonstone .139 Muscovite ...6, 147, 148 Mysore, Gold in...Ramboda ... ... ... ... 140 Rangala ... .2, 31, 104 Ratnapura 7, 28, 45, 59, 106, 128. 140 Report on Gold in |  | | Journal (article/letter/editorial) | | 125-carat yellow sap phire from Sri Lanka; a 189-carat greenish moonstone Canada Figure 17: Orange grossular...7 x 3 X 3-cm, blue corundum crystal from Ratnapura, Sri Lanka; NMNS #50957. (Photo: NMNS staff.) 326 ...from Madagas car; and a 22-carat sinhalite from Sri Lanka. O f primary importance in acquiring specimens |  | | Journal (article/letter/editorial) | | seen in a specimen collected in the Ganesh Himal district of Nepal by Dr. Allen M. Bassett during his search...magnificent sapphire faceted in 1983 in Ratnapura, Sri Lanka, shows a depth of blue and clarity rarely...zone of deep blue in an otherwise colorless faceted Sri Lankan sapphire renders this 3.28-carat gem a deep...respectively by the intact 15-mm crystal from Ratnapura, Sri Lanka, and a cross-section of an 8.5-mm crystal...Cambodian blue zircons are 1.2–1.41 carats. The Sri Lankan zircons include a 2.51-carat yellow oval, |  | | 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) | | Benton & S. Avella 83 Euhedral sinhalite from Sri L a n k a .........................................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...minerals from the Elahera gem field in Central Province. Henn (1985) characterized a distinctive olive-green |  | | 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...Russian alexandrite, Mexican fire opal, Ceylonese moonstone, and cat's-eye chrysoberyl are other plienoinenal |  | | Show/Event (guide) | | A-14B-02 room, No.339 HuanShi east,Rd, Yue Xiu District Guangzhou, China Tel: +86 13143700327 Booth#:...Jewelry with semiprecious stones (opal, amethyst, moonstone, topaz, citrine, peridot, garnet). JewelryToolS...Unit 6/3 Frazer Ave. Dehiwela Colombo, 10350 Sri Lanka Tel: +94 777313133 www.kodarat.com Booth#: E405...Unit 6/3 Frazer Ave. Dehiwela Colombo, 10350 Sri Lanka Tel: +94 777313133 www.kodarat.com Booth#: S107...Raod, Kahatapitiya, Gampola Gampola, Kandy 20500 Sri Lanka Tel: +94 813132786 http://www.tiffanigems.com |  | | Journal (issue) | | Ron Ringsmd The Elahera Gem Field in Central Sri Lanka Mahinda Gunawardene and Mahinda S. Rupasinghe...COLOMBIAN EMERALDS By Ron Ringsrud The Muzo emerald district, i n Boyacd, Colombia, contains several mines...used to describe the best. Yet Colombia's Muzo district actually encompasses several mines, of which two...emeralds mined in Colombia come from the Muzo district, and the Coscuez mine has grown to become the...responsible for most of the emeralds produced in the district from 1925 until i t was closed again in 1938. |
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