 | | 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...minerals that are mined at present are corundum, spinel, zircon and tourmaline. It was observed that higher |  | | Journal (article/letter/editorial) | | are known from the Rubikon mine in the Karibib district of the Erongo region. The GIA collection has two...cat’s-eye, from left 11.40, 8.02, and 9.60 carats, Sri Lanka, India, and Myanmar (Burma). No polarizer. GIA...greenish-yellow—coming from Mwami in the Karoi (Urungwe) district of Mashonaland West. Asia India Although transparent...carats and 10.51 carats, Mwami, Karoi (Urungwe) district, Mashonaland West, Zimbabwe. GIA Gübelin collection;...dramatic yellow to blue pleochroism. Sri Lanka Like India, Sri Lanka is a notable producer of cat’s-eye |  | | Journal (issue) | | 28 ct blue spinel, (6) 1.17 ct benitoite, (7) 2.14 ct blue sapphire, (8) 23.18 ct blue spinel, (9) 4.82...8.04 ct orange sapphire, and (18) 3.48 ct pink spinel. The necklace contains 25.85 ct of radiant-cut...(Brazil and Colombia), central and southern Asia (Sri Lanka, India, Afghanistan, Pakistan, Russia, and China)...[both jadeite and nephrite], opal, peridot, quartz, spinel, tanzanite, topaz, and tourmaline). Locality information...come from a number of sources, but predominantly Sri Lanka. Accented with smaller diamonds, the 129 gem corundums |  | | Journal (issue) | | jadeite (green), peridot, spinel (red, green, blue and synthetic blue spinel) and zircon (high and low...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 |  | | Journal (issue) | | Prospectors' Guide Map to the Gem Deposits of Sri Lanka C. B. Dissanayuke and M.S . Rupasinghe Two Treated-Color...CT; Mary C. Jensen, Toledo, OH; Joyce G. Jessen, Western Springs, IL; Jerry Johnson, Kennewick, WA; David...of metamorphic origin (from localities such as Sri Lanka, Myanmar, Please see LETTERS, p. 226 Figure B...Edwardian England and their counterparts in other Western countries. Distinct from the more conservative...pearls, preferred by Western society, were Bahrain in the Persian Gulf, Ceylon (now Sri Lanlza), and Australia |  | | Journal (issue) | | Summer 2019 Issue 43 All About Colored Gemstones Spinel In All Shades & Sparkling Colors A Publication...Jewelry Industry Special Spinel Pink and Red Gem Spinels in Marble and Placers Spinel from Tajikistan – The...Spinels from Sri Lanka 54 The Spinels of Mahenge, Tanzania In Search of Cobalt Blue Spinel in Vietnam Spinel...Spinel Inclusions – An Exercise in Aesthetics Spinel – A Gemstone for Kings 66 InColor InColor is the...Responsibility 94 Book Review Discovering the Gems of Sri Lanka 98 100 108 113 Members 14 Saurabh Bansal Damien |  | | Journal (issue) | | round brilliant-cut, both from the Argyle mine in western Australia. They represent typical examples of Hrich...some rare hydrogen-rich diamonds from Argyle in western Australia exhibit a violetish-grey to greyish-violet...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 |  | | Catalog/List | | GEMSTONES AND MINERALS | 31 2052 EMERALD AND BLACK SPINEL NECKLACE Centering on a large, bright green emerald...polished emerald beads, interspersed with large black spinel beads of 11.5mm, completed by a high-karat gold...DIAMOND PENDANT Coscuez, La Peña Blancas Muzo Mining District, Columbia Of large size for the species, this...TRAPICHE EMERALD Coscuez, La Peña Blancas Muzo Mining District, Columbia Trapiche emeralds are in a class by...sold without reserve 2063 CAT’S EYE HELIODOR Sri Lanka A large oval cabochon beryl displaying a bright |  | | Journal (issue) | | Branch: I. Knight, F. G .A. South Yorkshire & District Branch: I. R. M. Lewis, F.G.A. Examiners: B. W...by a hydrostatic weighing. The 1.81 liquid, the spinel, blende and diamond refractometers, Clerici solution...originate from sources near Lundazi in the eastern province. Pegmatites mined in that area a number of years...FERROAXINITE-ANOTHER FERROAXINITE—ANOTHER NEW GEM FROM SRI LANKA By HENRY HENRY A, Ph,D" F.G,A" A. HANNI, HÄNNI...have referred to the abundance of gemstones in Sri Lanka. As one of the productive localities of valuable |  | | Journal (issue) | | North-West Branch: S. Hill,: F.G.A. South Yorkshire & District Branch: J. L Reynolds, F.G.A. Examiners: E. A...stated that it occurred with topaz in the Taplejung District, Dhankuta Zone of eastern Nepal (see Fig. 2)....quality sapphire was also reported from the same district by A. Chikayama at the 19th International Gemmological...Gemmological Conference held in Beruwala, Sri Lanka, in November 1983. It is possible that the source of...1982. Gemstones of Pakistan: emerald, ruby and spinel. Gems Gemol. XVIII, 123-39. Gübelin, E.J. 1983 |  | | Journal (issue) | | method from an inclusion in a pink spinel octahedron from Sti Sri Lanka. Photomicrograph by Photomicrograph...illustration of this technique, a natural pink Sri Lankan spinel crystal containing a transparent, 324 apparently...done because spinel is isotropic and there is no chance of interference from the spinel. Therefore, an...from the inclusion. First the inclusion in the spinel was examined in polarized light (total extinction)...examination. Then the lens was placed in contact with the spinel immediately above the inclusion (good contact was |  | | 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...gems—cut supplies of Myanmar’s ruby and jade in Western markets to virtually nothing. This was particularly...price and grew ever scarcer in world markets, red spinel and pink-to-red tourmaline became sought-after...addition to the traditional spinel sources of Sri Lanka, Pakistan, and Myanmar (spinel, if polished elsewhere |  | | Journal (issue) | | Benton & S. Avella 83 Euhedral sinhalite from Sri L a n k a .........................................locally abundant. Diamond Hill is formed on the western limb of a north-south-trending syncline with displacement...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...noted sinhalite from Eheliyagoda in Sabaragamuwa Province. Gunawardene and Rupasinghe (1986) in cluded | | | Journal (issue) | | Benton & S. Avel/n 83 Euhedral sinhalite from Sri Lanka ............................ 91 by L. C. Pit/lln11...locally abundant. Diamond Hill is formed on the western limb of a nonh-south-trending syncline with displacement...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 |  | | Report (issue) | | ___________________ _ Cape of Good Hope Province ___________ _ Transvaal Province ____ -_-_------------Natal __...----------------------Victoria ___ ---------------------------_ Western Australia ___ ------------------New Zealand ______...Coastal Plain province ___________________ _ Stream sediments in the Coastal Plain province ________________________...and placers in the Blue Ridge province _____________ _ Spruce Pine district ____________ Madison County...Haywood County _____________________ _ Zirconia district ___________ ----Macon, Jackson, and Clay Counties |
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