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| 3749/canmin.46.1.139 THE FORMATION OF PRECIOUS OPAL: CLUES FROM THE OPALIZATION OF BONE Benjamath PEWKLIANG...Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, and School of...University of Adelaide, Adelaide 5005, South Australia, Australia Abstract The composition and microstructure...saurian bones (Plesiosaur) from Andamooka, South Australia, have been analyzed and compared to saurian...the same geological formation, north of Coober Pedy, South Australia. Powder X-ray-diffraction analyses |
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| 133 An isotopic study of surficial alunite in Australia 2. Potassium-argon MICHAEL I. BIRD, ALLAN geochronology...MCDOUGALL University, Canberra, A.C.T. 2601 (Australia) (Received June 28,1989; revised and accepted...(Isot. Geosci. Sect.), 80: 133-145. alunite in Australia, 2. Potassium- The potential for dating weathering...weathering and diagenetic events in Australia by the K/Ar dating of alunite-group minerals is assessed....62 Ma. K/Ar dating of an alunite sample from a central Western Australian laterite profile has provided |
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| ' • 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 do at Lightning Ridge, Coober Pedy, Andamooka, and on the Queensland opal fields. It also covers the...the scientific nature of opal and describes how the gem is cut and worked. In 86 superb colour plates...plates it display Australian opals and opal jewellery in al I their beauty: gives glin1pses of the areas in |
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| 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...49 South Australian Opal Fields Coober Pedy Mintabie Andamooka 41 53 57 59 Queensland Opal Fields...designed for, and is dedicated to, those thousands of opal lovers who hunt for the elusive gem during their |
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| Geosciences, University of Sydney, Sydney, NSW 2006, Australia a r t i c l e i n f o Article history: Received...Keywords: Opal Great Artesian Basin LA ICP-MS Cretaceous Multivariate analysis a b s t r a c t Opal is Australia's...the petrography and trace elemental composition of opal and its host rocks and consequently about the source...spectrometry (LA-ICP-MS) of precious and common opal from key opal mining areas in the Great Artesian Basin...detectable elements in opal, we show that a mining region from which an opal originates can be constrained |
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| 03 November 2014 Figure 2. Split pair of boulder opal from Quilpie, Queensland. Specimen is 4.5 × 3.5...Cretaceous Griman Creek Formation, Lightning Ridge, New South Wales. Specimen is approximately 15 cm long. Museum...MINERALS Figure 3. Opal pseudomorph after gastropod from Coober Pedy, South Australia. Specimen is 1.5...superb precious black opal from Lightning Ridge, New South Wales. D. Barnes, New South Wales Mineral Resources...Resources, photo. Australian Opal Resources Outback Spectral Fire Downloaded by [UQ Library] at 11:29 |
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| the front cover is a spectacular opal find from Mintabie, Australia, photographed by the author. The...The back cover pictures an opal mouse which was commissioned by and is in the collection of Paul and Bobbi...every new friend adds to my ever-evolving story of opal. I consider this story as a lifetime work still...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 |
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| multi-million dollar run at Coobcr Pedy and saw his opal. As a result he became an opal miner for a holiday and...struck it rich at Coober Pcdy. This was the beginning of his love a�air with opal. For the next three...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 |
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| remote settlements in outback Australia come 95 percent of the world's opal. That is a rough estimate and...value of Australian opal production at about $A24,000,000 for 1974-75. Most opal miners work alone in...into the sandstone. Usually they trade their rough opal with buyers at the fields—and mostly for cash. An...regulations had proved ineffective. Recorded exports of opal reached a peak of $A17,680,000 in 1973 and have...biggest buyer of rough opal until 1969. Hong Kong then became the principal centre for opal cutting and polishing |
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| for all the family. Australia is renowned for the world's finest Opal. But opal is not the only gemstone...masterpiece in itself. 1 OPALS "And lo! the beautiful opal That rare and wondrous gem Where the Moon and Sun...Wilcox In the first century A.O. Pliny wrote of the Opal, ". . . For in them you shall see the living fire...gems. Queen Victoria so loved the Australian Opal and made Opal popular by presenting one to each of her...mysterious "life", the Opal has been subjected to superstition and myth . Opal was said to ward off diseases |
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| : '. . ' ~ L . ..... Australia is renowned for the world's finest Opal. But opal is not the . ,. . . ...masterpiece in itself. 1 OPALS "And lo! the beautiful opal That rare and wondrous gem Where the Moon and...Wilcox in the first century A.D. Pliny wrote of the Opal, "... For in them you shall see the living fire...gems. Queen Victoria so loved the Australian Opal and made Opal popular by presenting one to each of her...mysterious "life", the Opal has been subjected to superstition and myth . Opal was said to ward off diseases |
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| Geoscience Journal of the Geological Society of Australia Publication details, including instructions for...tandfonline.com/loi/taje20 Towards a predictive model for opal exploration using a spatio-temporal data mining...Geosciences , The University of Sydney , NSW , 2006 , Australia Published online: 30 Apr 2013. To cite this article:...D. Müller (2013) Towards a predictive model for opal exploration using a spatio-temporal data mining...Geoscience Journal of the Geological Society of Australia, 60:2, 217-229, DOI: 10.1080/08120099.2012.754793 |
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| 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 |
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| 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...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 |
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| nature which was later to include our beautiful opal. Though Len never finished his formal education...Ridge, I spent quite a lot of time with Len in his opal research laboratory. I quickly learned that he was...amorphous silica science, that scientists from Australia and around the world continue to make contact...the many complex forms of the Queensland Boulder Opal. He has been £nvolved in every aspect of the trade...pictorial. Gan Bruce Beautiful Australian Opals opal possesses a fascination no other gemstone has. Everything |
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| sphere-type opal J. B. JONES Department of Geology, University of Adelaide, Adelaide, Australia AND E. R...of Building Research, C.S.I.R.O., Melbourne, Australia SUMMARY. Surface areas of 'amorphous'-type opals...shrinkage shown in dilatometer curves of this type of opal. IN an earlier paper (Segnit, Stevens, and Jones...responsible for the play of colours in precious opal (Pense, I963; Sanders, i964), in most cases the...previous publication 0965) only one ' amorphous '-type opal was studied in detail. We have now examined the |
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| Australian Opal Symposium & Updates Padparadscha Coloration Pantone's Color of the Year Latest Auction...black opal recently mined at Lightning Ridge. (Photo and stone courtesy of Cody Opal Australia) Industry...Industry InColor Special Opal Issue The 9th Annual National Opal Symposium Opal Classification: The Best...Way Forward Australian Opal Mining – 18 A Model for Responsible Mining Frozen Opal Fluids and Colloidal...Colloidal Crystal Fire: Gem Opal Deposits in the Heart of Australia Water in Opal -- What Can It Tell Us? The |
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| 424; Stuttgart. Abstract: Several banded Australian opal-AG samples were analysed by laser ablation ICP-MS...the opal, the distribution of trace elements for the white, translucent and play of colour opal bands...words: Australian opal, trace element analysis, laser ablation ICP-MS. Introduction Opal is a naturally...· nH2O (Smith 1998). The unique character of the opal is derived from its microstructure which is based...known by the Australian opal miners as “potch” (Ball 1982). Occasionally, an opal is found which changes |
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| 480 La Trobe Street Melbourne, Victoria 3000, Australia Nelson Canada 1120 Birchmount Road Scarborough...Formed from Surface Water: 19 The Opals of Australia PART II Gemstones of Igneous-Hydrothermal Origin...129 The Diamond Deposits of Argvle, Western Australia Index 141 FOREWORD Each gem deposit-whether...agency of surlace waters, focusing on the opal deposits of Australia. Part II of this book is devoted to those... Egypt and the new find at Argyle in Western Australia are used as examples. It is worth noting that |
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| 480 La Trobe Street Melbourne, Victoria 3000, Australia Nelson Canada 1120 Birchmount Road Scarborough...Formed from Surface Water: 19 The Opals of Australia PART II Gemstones of Igneous-Hydrothermal Origin...129 The Diamond Deposits of Argvle, Western Australia Index 141 FOREWORD Each gem deposit-whether...agency of surlace waters, focusing on the opal deposits of Australia. Part II of this book is devoted to those... Egypt and the new find at Argyle in Western Australia are used as examples. It is worth noting that |
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| Article 29 Si Solid-State NMR Analysis of Opal-AG, Opal-AN and Opal-CT: Single Pulse Spectroscopy and Spin-Lattice...A. 29 Si Solid-State NMR Analysis of Opal-AG, Opal-AN and Opal-CT: Single Pulse Spectroscopy and Spin-Lattice...Allan Pring 2,4 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.); allan...University, Sturt Rd, Bedford Park, SA 5042, Australia Department of Geology, School of Physical Sciences |
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| Geoscience Journal of the Geological Society of Australia Publication details, including instructions for...com/loi/taje20 Remarks on the age of precious opal in central Australia: reply to comment by Bruce Dickson P....The University of Sydney, – Sydney, 2006, NSW, Australia Published online: 17 Feb 2014. To cite this article:...(2013) Remarks on the age of precious opal in central Australia: reply to comment by Bruce Dickson, Australian...Geoscience Journal of the Geological Society of Australia, 60:8, 835-838, DOI: 10.1080/08120099.2013.870229 |
 | Povarennykh, M. Yu., Knot’ko, A. V., Matvienko, E. N., Plechov, P. Yu., Burmistrov, A. A., Luksha, V. L. (2016) Peculiarities of the irisation in precious opals in view of their mosaic–cluster (frustumation) inner fabric. Doklady Earth Sciences, 467 (2) 415-417 doi:10.1134/s1028334x1604022x | Journal (article/letter/editorial) |
| in synthetic and natural precious opals (from Australia, Ethiopia, Honduras, Slovakia, and Russia) and...was shown for the first time for Australian (Coober Pedy, Lightning Ridge and Queensland), Ethiopian (Mezezo...summarizing of the data on the formation of POs in Central Australia within the bounds of the Great Artesian Basin...aqueous silica constituting both this gem and common opal (CO) was leached from the continental volcano clastic...respectively) in opal (submicron cracks of apertures below µm). (a) A veinlet of precious opal within common |
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| Micros at the Texas-National Show. GEM O'F THE MONTH Opal occurs in many forms such as opalized dinosaur bone...which have been found in Australia. There are opalized trees also. Common opal known as opalite usually...usually fluoresces. Hyalite opal is formed of colorless transparent bubbles and contains inclusions of small...California is the locality of a type of opal known as bacon rind opal because of its light and dark layers...California locality near San Diego produces a smoky opal. The opals of Mexico are translucent with innumerable |
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| round the world north to south gem tour. About all we lacked were the North Pole, South Pole and penguins...brief time in the middle of the day. Arrival af Coober Pedy, Ausfralia. photo by Mrs. Oro Stewort ROCKS...ROCKS AND MINERALS 603 In Sydney, Australia, we saw the largest display of minerals at the Australian Museum...things in their community and the world . In Australia we did all the th ings we had hoped for~dug for...tourmaline. At Lightning Ridge I found a yellow opal which seemed to be a rarity, as well as the usual |
Coober Pedy, Central North, South Australia, Australia