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| spectroscopy study on eclogitic garnet inclusions in diamonds from Argyle Lin-gun Liu 1, T.P. Mernagh 2...AustralianNational University, Canberra, A.C.T., Australia z Divisionof Petrologyand Geochemistry,Bureau...Bureau of Mineral Resources, Canberra, A.C.T., Australia Received May 16, 1989 / Accepted February 19, 1990...formation of eclogitic-paragenesis diamonds from the Argyle lamproite pipe, we have employed a Laser Raman...peak shift of a garnet inclusion (extracted from diamond) with pressure in a diamond-anvil pressure cell |
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| maps produced by the Geological Survey of Western Australia are available from: Information Centre Department...Department of Mines and Petroleum 100 Plain Street East Perth WA 6004 Phone: (08) 9222 3459 Fax: (08) 9222...Bulletin 25 GEMSTONES OF WESTERN AUSTRALIA Gemstones of Western Australia second edition While systematically...authoritative, the second edition of Gemstones of Western Australia is written not only for the professional geologist...et al. The second edition of Gemstones of Western Australia is an updated version published in response |
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| Stocklmayer GEOLOGICAL SURVEY OF WESTERN AUSTRALIA Gemstones of Western Australia FRONTISPIECE Euhedral black... MINERAL RESOURCES BULLETIN 25 GEMSTONES OF WESTERN AUSTRALIA by J Michael Fetherston, Susan M Stocklmayer...Stocklmayer Perth 2013 GEOLOGICAL SURVEY OF WESTERN AUSTRALIA MINISTER FOR MINES AND PETROLEUM Hon. Norman...EXECUTIVE DIRECTOR, GEOLOGICAL SURVEY OF WESTERN AUSTRALIA Rick Rogerson REFERENCE The recommended reference...VC 2013, Gemstones of Western Australia: Geological Survey of Western Australia, Mineral Resources Bulletin |
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| De Beers Consolidated Mines SPONSORS Bateman Group (including Bateman Process Equipment, Bateman Minerals...Bateman Materials Handling) Rio Tinto Trans Hex Group Ltd CONTRIBUTORS Council for Geoscience (Geological...Mantle xenoliths from the Jetty Peninsula area (East Antarctica): samples of thermally eroding lithosphere... 20 Three-Stage Growth Model of the Natural Diamond of Octahedral Habit. 23 Petrography and mineralogy...of Diamond in Kimberlitic Melts at High Pressures and Temperatures. Relationships between garnet and |
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| + 4, Mineral Fe # — of Australia and™ Papua New Guinea ...O02unse Geology of the Mineral Deposits of Australia and Papua New Guinea The COVER PHOTOGRAPH shows...the remnant ovoid Pleistocene Luise Volcano on the east coast of Lihir Island, New Ireland Province, Papua...Economic Geology of Australia Guinea — 1. Metals 6.* Economic Geology of Australia Guinea — 2. Coal 7...Economic Geology of Australia Guinea — 3. Petroleum 8.* Economic Geology of Australia Guinea — 4. Industrial |
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| Petsch, and Tan Kanis Russian Demantoid, Czar of the Garnet Family W m . Revel1 Phillips and Anatoly S. Talantsev...liddicoatite, the calcium end-member of the tourmaline group.) Within the last two decades, important quantities...primarily in the vicinity of Mananjary, on the island's east coast. Both ruby and sapphire were among the stones...sapphire deposit is located in southern Madagascar, east oj the village of Andranondambo, approximately 150...Andranondambo area (figure 4): the Fort Dauphin group, which is composed mainly of hornfels with cordierite; |
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| virtually thousands of years in the early days of Western civilization, the words gem and engraved gem were...the replacement of emery by far faster-cutting diamond powder. The actual engraving process is exacting...Cylinder Seals and Scarabs. The first important group of engraved seals were the cylinder seals (see figure...The cylinder seal represents the first important group of seals used by man. An inverse image was engraved...available for engraving (Boardman, 1968). Amethyst and garnet became particular favorites and were often used |
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| tourmaline crystals from William Larson’s Stuart Mine in the Pala Mountains, California (USA). Next to...and medicine The beauty of the phenomenon gems Diamond: king of gemstones Corundum: the colorful palette...attributable to Above: The octahedral diamond crystal sits on an ultramafic garnet-lherzolite. It came out of the...quartz from the hydrothermal deposits of the Muzo Mine, Colombia. Collection: Mineralogical Institute of...fluorine in topaz and boron in tourmaline. In a third group, the mineral crystallization is truly unique: The |
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| The author in the shaft of the Consorsio Emerald Mine, La Pita Complex, Boyaca, Colombia. Photo: Ron Ringsrud...... 7 The Middle Ages: Sh ifting Values ... 9 Diamond: the Invincible ... 9 Chapter 2 Preciousness Redefined:...Overview The Garnet Group ... 163 Chapter 20 D emantoid Garnet... 167 Chapter 21 Tsavorite Garnet ... 171...171 Chapter 22 Malaya Garnet ... 177 Chapter 23 Spessartite Garnet ... 181 Introduction a11.d Overview...natural nacreous pearls, conch pearl, demantoid garnet, peridot, moonstone and sunstone have been added |
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| h o n y R. IDiamond Grit-Impregnated Tweezers: A Potentially Destructive...sapphires, such as those in this sapphire and diamond necklace and earrings, have been one of the most...durability of the treated stones. The sapphire and diamond necklace (total weight of sapphires is 109 ct)...1984). In June of 1990, Bob Crowningshield of the East Coast GIA Gem Trade Laboratory reported seeing another...1981).Astrid Corp., a member of the Golay Buchel group, produced diffusiontreated sapphires in Bangkok |
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| JOHANNESBURG 5:00 P M Diamond graders inscribe a diamond and issue a GIA Diamond Dossier® A $97.00 value...plasma-etching diffraction grating patterns on diamond facets produces a more fiery appearance. NOTES...indicates treatment in irradiated brown-orange diamond • Diamond with flower-shaped cloud • Unusual trigonshaped...rough • Fancy Intense blue type IIb synthetic diamond • Colorless cat’s-eye phenakite • Blue sapphires...from India • Emerald mining techniques at the Kagem mine, Zambia • Yellow grossular from Tanzania • An unusual |
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| 2011 PAGES 259–336 Dyed Purple Ethiopian Opal Garnet Composition from Gem Properties Symmetry Boundaries...Determining Garnet Composition from Magnetic Susceptibility And Other Properties Donald B. Hoover Garnet compositions...Fancy Vivid purple diamond • Strongly purple-colored black diamond • HPHT-treated diamond with the fluorescence...pattern of an HPHT-grown synthetic • Type IIb diamond with long phosphorescence • Clarity-enhanced opal...Fluorite from Namibia • Common opal from Western Australia • A bicolor, bi-pattern hydrophane opal • |
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| 480 La Trobe Street Melbourne, Victoria 3000, Australia Nelson Canada 1120 Birchmount Road Scarborough........ 50 AUSTRALIAN PINK DIAMOND .................... 54 FANCY BLUE DIAMOND ........................... 58 FANCY BROWN DIAMOND ..................... 62 THE HOPE DIAMOND .......................... 66 THE TIFFANY...TIFFANY DIAMOND ........................ 70 FANCY YELLOW DIAMOND ..................... 74 COLOMBIAN EMERALD...EMERALD ........................... 82 DEMANTOID GARNET .......................... 86 MALAYA GARN ET . |
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| —_— 1.12 — 8 10 — —_ 12 14 _ — Courtesy of F&S Group Geology and World Deposits TAO 6.30 5.60 5.00 4...and related materials Feldspar 106 Fluorspar Garnet Graphite 110 Slate Sodium sulfate 122 = 130...manganese also has dozens of nonmetallic uses. The diamond is both a gem and an industrial mineral. Then there...come not merely from one district but from a single mine. Thus the physical properties of many rocks and...the industrial minerals covers a highly diverse group of materials. At the one extreme is gravel and crushed |
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| alert|Pink and blue CVD synthetic diamonds|World Diamond Magazine|Coloured stone app 384 Practical Gemmology...Notes Large kunzite from Brazil| Marble-hosted ruby mine, Mogok, Myanmar|Secondary gem deposit in Mogok,...emerald|Large black synthetic moissanite as a black diamond imitation|Peridotpolymer composite|Dyed quartzite...Gemmologisches Institut, Hamburg, Germany; Tay Thye Sun, Far East Gemological Laboratory, Singapore; Pornsawat Wathanakul...Microsystems, Wetzlar, Germany; Bear Williams, Stone Group Laboratories LLC, Jefferson City, Missouri, USA; |
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| 23(5), 278-83 LONDON DIAMOND REPORT The Gem Testing Laboratory 327323 Diamond grading service established...established in 1980 Each diamond graded by three experienced graders Report based on the current international...clarity Whether buying or selling, the London Diamond Report assures the prestige of your stone The...which are said to be very close to the chrysocolla mine (see p.330). The RI of the pink opal is 1.45 1.49...rough on the left is 4 cm wide. The Acari copper mine near Nazca in Arequipa department (close to the |
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| century. These t w o pieces-a platinum, yellow gold, diamond, and blue sapphire brooch (l9I16 in. high x 1 in...in. wide; 3.9 c m x 2.5 c m ) and diamond and onyx in platinum bar pin (2% in. x 1/4 in.;5.4 c m x 0... The bold whiteness of platinum combined with diamond or crystal is a fundamental scheme of Deco jewelry...coinbination: blaclz onyx or blaclz enameling with diamond or crystal or both (figure 6).The fruit salad motif...f Art Deco jewelry. The sapphire, black onyx, diamond, coral, and platinum used serve to illustrate the |
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| “Bram” Janse Archon Exploration Pty. Ltd., Carine, Australia Robert Kane Fine Gems International, Helena, Montana...Dhamani Dhamani Jewels, Dubai Moti Ganz Israel Diamond Institute, Ramat Gan Doug Hucker American Gem Trade...Association, Dallas Nir Livnat Steinmetz Group, Johannesburg Lawrence Ma Diamond Federation of Hong Kong Dilip Mehta...Darwin, Australia Avi Paz Israel Diamond Exchange, Ramat Gan Martin Rapaport Rapaport Group of Companies...Business For a Better World 105 107 114 123 Diamond Identification Gem Localities and Formation Colored |
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| Debate Centers The Steinmetz Group Instore Magazine GIA's 75th Diamond Anniversary Gala The Daily Navigator...000) Dimexon Eurostar, Hearts On Fire Israel Diamond Institute Sunset Soirée Monday Luncheon at the...Professional Jeweler ABN Amro Bank/ The VNU Jewelry Group Monday Afternoon Interlude Opening Session with...By My Way Jewelry Co. Inc. Hotel Key Cards TJF Group (in collaboration with Vicenza Fair on the Italian...Block Insurance Tuesday Debate Centers Rapaport Group of Companies Cybercafé GRC Travel Grant Sponsorships |
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| 226 1r. and Carl A. Francis Green Opal from East Africa f o h n I. Koivula and C. W. Fryer REGULAR...to the sapphire above and the 2.67-ct demantoid garnet below by two red spinels. Yellow sapphire is discussed...ct) that were being compiled to make a ruby-and-diamond necklace, bracelet, and earring suite. When each...are perhaps the most intriguing members of the garnet group. Much interest has developed over these garnets...article in this series and will include the present group of stones as well as all the other garnets that |
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| 2009 VOLUME XLV Celebrating 75 Years of G&G The Diamond Type System SUMMER 2009 Identifying Cu-Bearing...Breeding and James E. Shigley A guide to determining diamond type, and its implications for identifying treated...Lab Notes Bicolored diamond • “Black” diamond with deep violet color • Carved diamond crucifix • Rare type...type IIb gray-green diamond • Unconventional diamond cuts • Pink CVD synthetic diamond • Rare star peridot...York, New York A. J. A. (Bram) Janse Perth, Australia Michael Krzemnicki Basel, Switzerland James |
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| . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and...inosilicate supply and use. . . . . . . . . . . . . . Garnet . . . . . . . . . . . . . . . . . . . . . . . ...Chemistry and mineralogy of garnet-group minerals . . . . . . . . 45.2. Magmatic garnet deposits . . . . . . |
| | Journal (article/letter/editorial) |
| . . . . . . . . . . . . . . . . . . . Platinum group elements (PGE) . . . . . . . . . . . . . . . . ...platinum-group-element deposits . . . . . . . . . . . . 6.3. Structure-related platinum-group-element...Sedimentary platinum-group-element deposits . . . . . . . . . . 6.5. Platinum-group-element supply and...inosilicate supply and use. . . . . . . . . . . . . . Garnet . . . . . . . . . . . . . . . . . . . . . . . ...Chemistry and mineralogy of garnet-group minerals . . . . . . . . 45.2. Magmatic garnet deposits . . . . . . |
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| century Scribbling Ring; the Blue Wittelsbach Diamond becoming the most expensive gem in history, sold...with everything we do at The Colourful Company Group Ltd, it was a true team effort. Tony Poole our resident...able to discover. Living on the Gold Coast in Australia, my sister talks of how beautiful the Great Barrier...who remain fairly primitive in comparison to the Western World have had the least negative effect of all...precious metals, however, is entirely different. The Diamond ring that you have or aspire to own came into existence |
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| Singapore, Hong Kong, Japan, The Philippines, Australia, New Zealand and Tasmania. Each and every one...talking about 'two lines in the blue'. General study group! They were ready to enrol in the serious business...talk on the gemfields in Burma, Indo-China and Australia and answered many questions. After dinner the...containing the inclusion was freshly ground using a diamond-charged, 360 grit, grinding lap (not a copper lap)...blue, red, yellow and colourless occur (Pough, of East Africa. Mrica. Numerous the many unusal gemstones |
