 | | Journal (article/letter/editorial) | | W1T 3JH, UK Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological...tandfonline.com/loi/taje20 Towards a predictive model for opal exploration using a spatio-temporal data mining...D. Müller (2013) Towards a predictive model for opal exploration using a spatio-temporal data mining...mining approach, Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological...1080/08120099.2012.754793 Towards a predictive model for opal exploration using a spatio-temporal data mining |  | | Report (issue) | | Contents 4 Map: Notable Opal Localities 50 BY BRUCE PAUL GABER 6 The Opal Enigma: Science, History...FRAZIER 12 Classic Slovakia 14 Rainbows, Harlequins and Pins Afire: Play of Color in Opal BY MAX WEIBEL...WEIBEL Sparkling Opal in Ancient Bones: Precious Relics from the Age of Dinosaurs Facing Page: Robert A....vibrant with opal pattern and color. In this extreme close-up of a Lightning Ridge black opal, the field...approximately 3 mm wide. Opal courtesy Jenni Brammall BY ALEX RITCHIE 52 An Opal Glossary of Terms BY |  | | Journal (article/letter/editorial) | | 99, pages 1488–1499, 2014 Australian sedimentary opal-A and its associated minerals: Implications for...The vast majority of precious opal on the world market comes from opal fields in the Great Artesian Basin...analyzed 20 opal-A samples from the Andamooka (South Australia) and Yowah (Queensland) precious opal fields...and the host rock. Opal-A consists of submicrometer-sized silica spheres with an average diameter of...deviation (RSD) of <6%. Polydisperse spheres show an average diameter of 160–320 nm with a RSD larger |  | | Journal (issue) | | Clarity Grading . . . “Chocolate Pearls”. . . Leopard Opal . . . Rainbow Andradite from Japan THE QUARTERLY...identifying these products. 236 Leopard Opal: Play-of-Color Opal in Vesicular Basalt from Zimapán, Hidalgo...Myanmar • Moonstone from Madagascar • Phenomenal fire opal • “Sunset” quartz from Brazil • Swedish Blue (slag)...University) with a degree in natural science. As an officer in the U.S. Navy from 1942 to 1946, he read...gems to pass the long hours at sea and even arranged an unscheduled stop in Colombo, the capital of Ceylon |  | | Journal (issue) | | presence or absence of a bead. Figure 2 provides an overview, illustrating sectioned cultured pearls...Figure 1: The pearl farm in North Bali, an aquacultural business with an ultra-modern approach to oyster production...host animals for the cultured pearls. Both halves of an oyster’s shell have a layer of soft skin. This tissue...purpose of growing a cultured pearl. The body of an oyster selected as a host animal has two sites where...for the operation site, hygienic surroundings and an instrument rack which is rinsed continuously characterizes |  | | Book (volume) | | review of deposits, a helpful geographical index, and an exceptionally complete listing of books and arucles...America has developed into a major exporter rather than an importer. A VAN NOSTRAND REINHOLD BOOK . Digitized...AMERICA In Iwo Volumes Volume | JOHN SINKANKAS [aN] VAN New NOSTRAND York Cincinnati REINHOLD Toronto...neat erie ra 8 ‘y - ml 3 ee pon * : c= : an vi 5 = fii? i a j — » ya y _— ’* : ...loan of photographs of Tampa Bay silicified coral. An outstanding compilation of Mexican gemstone information |  | | Book | | of “ Man 110 MAIN STREET. INS CLACHAN AN CUIMHNE. ALUINN CHACHAN MATHAIR ALUINN. PREFACE...have the Lava been As land to and best Old an large the the be strata of of the Red area...of the flows thin up the hills, occasional an top the ; those with gas and amygdules highest...agates, to fine be at a grained occasional an of some seen, amygdules intimately have we...flows, and many fine the hard, number of the An of level- agate being north north-west. interposed |  | | Journal (issue) | | ___________ pg. 267 271 Chrysoprase and Prase Opal from Haneti, Central Tanzania James E. Shigley,...characteristics of Tanzanian chrysoprase and green prase opal are revealed. 280 Demantoid from Val Malenco,...Kagem mine, Zambia • Yellow grossular from Tanzania • An unusual blister pearl • Myanmar report • Phenakite...black synthetic moissanite • Dyed sillimanite as an emerald imitation • High-RI Ba-Zr glass • Dyed pink... pp. 37–41; see also figure 1). This article has an English abstract and figure captions, as it was felt |  | | Book | | many Silunan materials. Several and steel in Ordovic,an s,o engmeenng. Carnbnan 570 aspects of these sciences...dealing with their formation, occurrence and the qualities to note when making an identification. Many of lhc...""""'"''• ""' «,,=,.;,;,-..,~ .. ;,, cei,tsurn,r,an,es tho """'~ ~""'"' ~ - - ol ~,· _.., ,,.,•...Asterisl<5 - - - - - + - - - denoie the most ll!ll)O<\an! d,S1m9u,sh,,,g fec:ures of rn,oe,a~ bamples ""'...major chemical componen ts? The Earth consists of an extremely di:nse core, a fairly dense mantle and |  | | Report (issue) | | INTRODUCTION. reports are those on the Mercur district, by J. E. Spurr and S. F. Emmons; the Bingham...Bingham The senior author, J3. S. Butler, began district, by J. M. Boutwell, Arthur Keith, and field work on...deposits of Utah in the S. F. Emmons; the Park City district, by J. M. FIELD .WORK AND AUTHORSHIP. summer...the Plateau region. The junior author, G. F. Loughlin, began work in the Tintic district in 1911 in collaboration...the Tin tic and Thomas ranges, of the Leamington district, and of districts in theW asatch Range. Several |
|
