 | | Report (issue) | | Contents 4 Map: Notable Opal Localities 50 BY BRUCE PAUL GABER 6 The Opal Enigma: Science, History...and Pins Afire: Play of Color in Opal BY MAX WEIBEL Sparkling Opal in Ancient Bones: Precious Relics...of Lightning Ridge in New South Wales takes stunning photographs vibrant with opal pattern and color. In...Lightning Ridge black opal, the field of view is approximately 3 mm wide. Opal courtesy Jenni Brammall...RITCHIE 52 An Opal Glossary of Terms BY SI AND ANN FRAZIER BY PETER HUBER 64 Opal from Mexico: Unsurpassed |  | | Book | | coronet of agate and topaz, Bert Scheps, F.G.A.A. for opal and carnelian jewellery, Harry Pearce for the clock...and bound by Kyodo Printing Co Ltd, Tokyo. National Library of Australia Cataloguing in Publication data...colourbook series). ISBN 0 589 07012 6. I. Gems - Australia - Identification. I. Perry, Ron.joint author....Gemstones in Alphabetical Order Origin of Coiour - Opal 11 14 - 101 50 Tests for Identification 106...excellent geological displays, and thrir courtesy and co-operation are truly appreciated by all who wish to |  | | Book | | Pty. Ltd. 26 Harries Road, Coorparoo, Qld. 4151 Australia © Copyright Len Cram 1994 © Photography and text...Black Opal. Contents Introduction 5 Opal History 7 Australian Opals 13 Australian Opal Geology...What is Opal? On the Trail 15 17 19 Let’s Go Hunting For Opal! 23 New South Wales Opal Fields Lightning...Lightning Ridge White Cliffs 41 49 South Australian Opal Fields Coober Pedy Mintabie Andamooka 41...41 53 57 59 Queensland Opal Fields 61 53 This book, the Field Guide to Australian Opals, has |  | | Journal (article/letter/editorial) | | Allan Pring 2, * South Australian Museum, North Terrace, Adelaide, SA 5000, Australia; Neville.Curtis@flinders... Flinders University, Bedford Park, SA 5042, Australia Correspondence: Jason.Gascooke@flinders.edu.au...was undertaken to characterise opal-AG, opalAN (hyalite), opal-CT and opal-C, focussing on the Si-O fingerprint...spectroscopy shows that the three major IR bands of opal are split into transverse optical (TO) and longitudinal...non-destructive delineation of play of colour opals into opal-AG or opal-CT gems. We find that there are no special |  | | Book (edition) | | FL Estes Park, CO ABOUT THE COVER Pictured on the front cover is a spectacular opal find from Mintabie...Mintabie, Australia, photographed by the author. The back cover pictures an opal mouse which was commissioned...Preface Every trip and every new friend adds to my ever-evolving story of opal. I consider this story as...guess I will just have to keep going back to Australia again and again! The stories contained in this...and I actually went to these places, searched for opal, broke down in our camper, and met many wonderful |  | | Book | | Pedy. Opal worth many millions of dollars is mined here each year. (Photo by courtesy of South Australian...IV 1.OPAL - WHAT IS IT? .......................................... . 2.MODERN HISTORY OF OPAL ........4 3.THE OPAL FIELDS ............ . .. ............................... 7 4.TYPES OF OPAL ............ .......... . ....... ...... 22 8.CUTTINGSEAM OPAL ........... .... . ......... .... ...... . ... ...CUTTINGBOULDER. MATRIX AND FOSSIL OPAL . ... .................. 42 10.THE MAKING OF OPAL DOUBLETS .. ..... ... |  | | Journal (article/letter/editorial) | | A Review of the Classification of Opal with Reference to Recent New Localities Neville J. Curtis 1,2 ...Pring 1,2, * 1 2 * South Australian Museum, North Terrace, Adelaide, SA 5000, Australia; neville.curtis@flinders...University, Sturt Rd, Bedford Park, SA 5042, Australia; jason.gascooke@flinders.edu.au (J.R.G.); martin...Abstract: Our examination of over 230 worldwide opal samples shows that X-ray diffraction (XRD) remains...for delineation and classification of opal-A, opal-CT and opal-C, though we found that mid-range infra-red |  | | Book | | ' • t IN COLO~ · AUSTRALIAN OPALS IN COLOUR Opal can be fairly stated to be Australia's national...reader through all the Australian opal fields, describes the types of opal 111ining, the lives of the miners...and on the Queensland opal fields. It also covers the scientific nature of opal and describes how the...superb colour plates it display Australian opals and opal jewellery in al I their beauty: gives glin1pses...lapidary working of these precious getns. Every proud opal owner will want this book and all who read the book |  | | Book | | dollar run at Coobcr Pedy and saw his opal. As a result he became an opal miner for a holiday and, in 1965...Pcdy. This was the beginning of his love a�air with opal. For the next three years, until his return to medical...at Collarcnebri in December 1967, he searched for opal. Dr Kalokerinos became obsessed with the problems...which formerly surrounded precious opal. The author's love for opal is described with a lyricism rare...is the first serious study of Australian precious opal and describes for the first time some simple but |  | Fritsch, Emmanuel, Gaillou, Eloïse, Ostroumov, Mikhail, Rondeau, Benjamin, Devouard, Bertrand, Barreau, Alain (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16 (5) 743-751 doi:10.1127/0935-1221/2004/0016-0743 | Journal (article/letter/editorial) | | palygorskite is deduced from that of its mixture with opal. The opal-CT–palygorskite–quinone association is a geological...lake environment in a volcanic region. Key-words: opal, optical absorption, nanostructure, Raman, palygorskite...of monodisperse spheres – which applies only to opal showing a play of colour (Sanders, 1964). Many opals... 1978; Murray & Sanders, 1980). The gemological opal classification is based on the presence or absence...Play-of-colour opal, sometimes referred to as noble opal, shows this effect, whereas common opal does not. |  | | Book (edition) | | Amethyst 72 Apatite Aquamarine 5) 80 é 86 Black Opal 92 Blue Sapphire 102 Chalcedony 112 Cultured...Gemmological Association of Australia Fellow of the Gemmological Association of Australia Australian Director...mesmerised by a small water-filled container full of Opal tailings, given to me by an aunt. My professional...through a translucent gemstone. Good examples are Fire Opal and Rose Quartz. ¢ Transparent gems allow transmitted...“These are great collectors’ Rubies and assuming that new deposits don't miraculously appear and flood the |  | | Book | | LIBRARIES Inal library THE BOOK OF AGATES LELANDE QUICK co-author of Gemcraft The necessary information sought...varieties, with favorite location of quartz agate, opal wood — collectors. The petrified gems throughout... tell about other quartz varieties such as the opal, and petrified wood; and to give him the most complete...Other Quartz Chapter 5. Opal and Its 25 30 50 Varieties Glossary of Opal Terms 54 Wood 62 Chapter... ehrysoprase, tigereye, and common and precious opal. In the general opinion of most collectors, chalcedony | | | Book | | ---- ·--· and Other Quartz Gems by LELANDE QUICK co-author of G emcraft The vital , necessary information...ties and forms of quartz gems other than agate, opal and its varieties, and petrified wood a great favorite...tell abot1t otl1er Cttiartz varieties st1ch as the opal, jasper, ancl petrified wood; a11d to give l1in1...chryso1)rase, tigereye, and common and preciot1s opal. In the gen eral 01)inion of n1ost collectors, chalced...bulldozed from time to time and great quantities of new tl1t1ndereggs are uncovered. However, in the desert |  | | Book (edition) | | years, now completely revised and updated with many new illustrations Would you know the difference between...Third Edition Walter Schumann Sterling Publishing Co., Inc. Naw Coliass ela aie { > , Fah :F be ... 85 Value of Gemstones 126 Tourmaline Group Fire Opal 168 . | 85 Description of Gemstones 130 Spodumene...Zircon Petrified Wood 164 166 Opal Species 190 Azurite Precious Opal 166 —49 Malachite 194 Lesser-Known...Pearl 256 Operculum 265 Mother of Pearl 265 266 New on the Market Verdite Charoite Ammonite Carletonite |  | | Book (edition) | | QE392 .S54513 1997 // Sterling Publishing Co., Inc. New York 1 Contents Luster 41 Pleochroism...94 Beryl 96 Chrysoberyl 98 Prasiolite 1 Common Opal 1 1 18 154 Nephrite 156 Jadeite 120 Rose...Hiddenite 114 Kunzite 114 Quartz 116 Opal 150 Precious Opal Fire Opal 152 Rock Crystal 116 Smoky Quartz...Ivory 226 Odontolite 226 Amber 228 Pearl 230 240 New on the Market Verdite 240 Charoite 240 Gneiss 240...variations is about double that. From time to time, new gemstones are discovered or varieties with gemstone |  | | Journal (issue) | | Morgan, F.G.A. North-West Branch: I. Knight, F.G.A. South Yorkshire & District Branch: I. R. M. Lewis, F.G...Schorl-dravite Elbaite Grey-bluish Green Pink-white 22 0O Green/pink Green/pink o• oO ,, Minas...determined, suggesting in this way the presence of of CO C 0 22 and H 2200 as main constituents, indicating...those known for pyralspite garnets (Moore & & White, White, 1972; 1972; Loh, Loh, 1975; 1975; Schmetzer...Electronic spectra of garnets. Moore, R. K. and White, W. B. (1972): of transition metal ions in silicate |  | | Book | | and Co.) GEMSTONES FOR EVERYMAN by B. W. ANDERSON Q£ 393 - VAN NOSTRAND REINHOLD COMPANY NEW YORK...Educational Publishing, Inc. 450 West 33rd Street, New York, NY loooi Van Nostrand Reinhold Limited 1410...Tourmaline and Zircon Quartz, Agate and Chalcedony Opal Peridot, Sinhalite, Zoisite and Spodumene 9 page...and tourmaline H. Zircon I. Quartz group J. Opal K. Chalcedony group L. Jade minerals M. Lapis...overburden covering diamondiferous gravels on coast of South West Africa II ILLUSTRATIONS 4. Rough diamonds |  | | Book (edition) | | - ae : 126 Tourmaline Group 130 Spodumene 166 Opal Species 170 Jade _ Species 174 Peridot Hiddenite...Treatment 271 Genuineness Test for Diamond 274 276 New on the Market 283 Symbolic and Beneficial Gemstones...illustrations. Information has been updated and new scientific knowledge and economic conditions were...variations is about double that. From time to time, new gemstones are discovered or varieties with gemstone...hitherto unknown minerals, new names had to be found. A principle for naming new minerals and gemstones was |  | | Book (edition) | | often kind words of this forbidding air to a give new subject, but they are used cumlocution, and not...A. Sir My thanks are Beers Consolidated Mines Co. Ltd., Miers, F.R.S., Principal of the University...concentrating the blue ground to Messrs. I. J. Asscher & Co. for the use of the photograph of the ; Cullinan...xi PAGE CHAP. XXX. OPAL (White XXXI. FELSPAR dorite, Opal, Black Opal, Fire-Opal} (Moonstone, Amazon-...GEM-STONES (in colour) XXVIII. OPAL MINES, WHITE CLIFFS, NEW SOUTH WALES .252 XXIX. GEM-STONES (in colour) |  | | Book | | 1946. Ingludes the Pringle Diary. Bert Webber. South approach of the Oregon Trail via Nevada’s Black...Bridges — Expanded Edition; Bert and Margie Webber. (6 New Bridges!) Photos, how to find all 65 standing bridges...Run beaches find agatized myrtle, etc., blue and white banded agates, flower jaspers. "jade" and serpentine...Arago State Pk. Pliocene-Pleistocene fossils in cliffs south of Cape Blanco Lighthouse. [ 2 ] CENTRAL OREGON...jaspers, milky chalcedony in Agate Desert area of White City to Eagle Point. [ 8 ]GREEN SPGS MT. (about |  | | Journal (issue) | | The Current Market Scene For The Jewelry Maker A New Bola Tie Design Jeweled Pen Caps The Art Of Sand...CARVING MICROMITE Diamond Carving Points AND NOW ... NEW FROM LAPCRAFT t For Dressing and Truing . . . MICROMITE...scintillating colors of Australian opal come to us through the courtesy of the Opal Spectrum company. For details...Our Cover feature. And, for a fascinating look at opal mining , plus more pictures, turn to page 8. AND...Treasurer 8810 37th s.w., Seattle. WA 98126 Don SOUTH CENTRAL FEDERATION OF MINERAL SOCIETIES Offlc:era |  | | Book (edition) | | expanded, this completely updated book includes new material on high-tech treatments and synthetic diamonds...gemmology since Webster’s last edition in 1976. New diamond simulants have come to the marketplace, high-tech...few primary gem materials with the exception of opal, formed by the interaction of sedimentary pore-fluids...through various phenomena such as ‘play of colour’ in opal. It is only rarely that a rough gem or crystal is...emerald and sapphire, and over time pearl and black opal often came to be included — all stones for which |
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