 | | Journal (article/letter/editorial) | | T H E STORY OF OPAL By G. FREDERICK SHEPHERD Technical Assistant In Geology - (1932) Museum of Science...Science and Industry, Chicago, Illinois Opal An Evil Omen? It is most deplorable that the mind of the...the mag nificent and ever-changing beauty of the opal to be maligned with puny super stition. Many objects...misunderstanding, ungrounded re port, or superstition, and the opal is one of them — with little, if any, reason for...for the spread of its ill-fated powers. The opal has not always been thought of as being unlucky, and it |  | | Book (volume) | | it essential same this In species and with an other primary crystalline largely opaque stones...and 195 included under minerals of bright a opal, cat’s-eye or much that transparent have occurrence...Stones STONES. the shall description include an dealing with rockThe minerals section mention ...and angle into reduced higher other less a an brilliants and some wearing for of that it...form a facet each stone prismatic octahedron an As suitable it proportion to as RELATED stones |  | | Book (edition) | | SIMON & SCHUSTER'S GUIDE TO ROCKS AND MINERALS An easy-to-use field guide, with over 1,000 spectacular...minerals, because regardless of whether they form by an organic or inorganic process, they are man made....coniferous trees; opal, an amorphous variety of hydrated silica; and limonite, an amorphous hydrated...long. However, it will be quite different from, say, an orthoclase crystal, whatever the latter's size. The...cube. , , parallel to one or two axes (i.e., with an infinite intersection) will have the corresponding |  | | Book (edition) | | great changes of emphasis in mineral collecting and an unforeseen growth in the number of collectors. Mineral...Africa, and Asia have become significant sources. An increasing recognition of investment values in fine...carefully preserved to arrive on a dealer's shelf in an unblemished state. Would that the old-time miners...common can't-be-bothered attitude can be replaced by an enlightened recognition of the operators' public...insurance coverage for the protection of the mine and quarry operators. The writer wishes to express his appreciation |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | role in naming the plants and animals, also showed an interest in classifying the minerals. His natural...synonymy was improved and extended. The work became an international classic for over 50 years, due to the...Institut fur Mineralogie der Universitat Wien, Austria. Michael Zolensky: Lyndon Johnson Space Center...XV xvi Introduction international members and an affirmative response of at least two-thirds of those...Once accepted, the information must be published in an appropriate journal within two years or the CNMMN |  | | Book | | Phisicke, 1601. Theophrastus's History of Stones, with an English version by Sir edition, 1774. The American...sciences, demands industry and attention and to become an accomplished mineralogist much and carean acquaintance...importance. It is true minerals frequently occur in an amorphous state ; in which case, the particles of..., or Rhombohedral. lateral axes, intersecting at an angle of 60°, and one vertical axis at right angles...the Diamond, and in a less degree by the Precious Opal. Change of Colours is of a somewhat similar nature |  | | Journal (issue) | | d i e s cutting Petersburg granite in the Dale quarry (Figure 1). Clear glassy areas within the crystals...gems (Frank Crayton, personal communication). The quarry is operated by Tarmac Inc. Powhutcan County - Clear...Golden beryl has also been found in the residuum above an alaskite d i e along a ridge crest about 0.5 miles...Tract , (Dunlap) mine. The chrysocolla is :generally an intense blue color and is often associated with greer...inpegmatite,largest crystal 3 inches long, Dale quarry, ChestefieldCounty(photograph by T. M. Gathright |  | | Book | | in Adamello Massif, Central Southern Alps, Italy: An Investigation of Its Mineralogy, Crystallography...and Allan Pring A Review of the Classification of Opal with Reference to Recent New Localities Reprinted...collaborative research projects worldwide. Ian Graham is also an Associate Editor of Mineralogical Magazine and the... is positioned between academia and industry. As an applied science, in gemology, the instruments used...Adamello massif, Italy. Tourmaline is considered as an important recorder of its geological formation [9 |  | | Journal (issue) | | mmigration Ol ice. Opal Mines, Wbite Cllifs, New South Wales. Oourte8JI Special Opal Nuinber Granite and...magazine• .'-============================ r ROCH. S an d MINERALS A NON-TECHNICAL MAGAZINE --'ON-MINI...1Iuseum. B y 1rilli<1m F. Foshag The Geology of Opal. By, Oilb rrt Hart.. . . . . . . . . . . . . . ...Quest of the Opal. B!I If. T. Strnng.. . ....................... . . ('(}Jor Play in Opal. B.11, Il. E... . . . . . . . . . . . . . . . . . . . . . 'fbe Opal. JJy E11,qe11e Jr. B1"11k..................... |  | | Journal (article/letter/editorial) | | and sedimentary interbeds of the Columbia River Basalt Group (CRBG) in central Washington State, USA....is diverse, with silica minerals that include opal-A, opal-CT, chalcedony, and macrocrystalline quartz...commonly, specimens contain multiple phases. Opal-A and Opal-CT often coexist. Some woods are mineralized...macrocrystalline quartz are common as minor constituents in opal wood. In these specimens, crystalline silica filling...vessels open. Diagenetic transformation of opal-A to opal-CT in fossil wood has long been a widely accepted |  | | Report (edition) | | .......................... 108 Chapter 13 Opal 109 Opal — gemstone properties .................................................................. 109 Opal terminology ........................................................................ 110 Precious opal in Western Australia ................................................................. 113 Common opal ...................................................................................... 114 Common opal in Western Australia........................... |  | | 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 |  | Swayze, G. A., Clark, R. N., Goetz, A. F. H., Livo, K. E., Breit, G. N., Kruse, F. A., Sutley, S. J., Snee, L. W., Lowers, H. A., Post, J. L., Stoffregen, R. E., Ashley, R. P. (2014) Mapping Advanced Argillic Alteration at Cuprite, Nevada, Using Imaging Spectroscopy. Economic Geology, 109 (5) 1179-1221 doi:10.2113/econgeo.109.5.1179 | Journal (article/letter/editorial) | | hydrothermal alteration. Partial lichen cover on opal spectrally mimics chalcedony, limiting its detection...Kerr et al., 2011). Spectroscopy is also playing an increasing role in analyses of alteration in drill...near-infrared (VIS-NIR or VNIR-SWIR) 0.4- to 2.5-μm range is an effective tool for evaluating subtle patterns of...disturbed by mining activities. The Cuprite mining district is located about 200 km northwest of Las Vegas...Stonewall Mountain Hi 37 o 30' Figure 2 Cuprite o an yo n Inferred caldera margin 266 117 15' ck Pa |  | | Book (volume) | | concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...the western counties, especially the Clay Center Quarry 12 miles southeast of Toledo but in Ottawa Co....jct. of Brint St. and Centennial rd., the Medusa Quarry (SW of 4 quarries), very many specimens⎯fossils...deposits⎯Hematite. OTTAWA COUNTY CLAY CENTER, area limestone quarry, famed⎯Calcite, Celestite (fluorescent), Dolomite |  | | Book (volume) | | concerned, Ohio is unique in but a single gemstone, an exceptionally high quality, colorful flint that is...chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...the western counties, especially the Clay Center Quarry 12 miles southeast of Toledo but in Ottawa Co....jct. of Brint St. and Centennial rd., the Medusa Quarry (SW of 4 quarries), very many specimens⎯fossils...deposits⎯Hematite. OTTAWA COUNTY CLAY CENTER, area limestone quarry, famed⎯Calcite, Celestite (fluorescent), Dolomite |  | | Book (volume) | | Plains, wells drilled deep into this unit provide an inexhaustible supply of cold artesian, Rocky Mountain...banks, tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes...slopes, stream beds, etc. petrified wood, wood opal; along the Grand R. though entire Co., regional...banks, breaks, gravels, etc. petrified wood, wood opal. 438 A Location Guide for Rock Hounds in the...minesColumbite, Gold, Silver, etc.; and (2) Old Marble Quarry on the Needles Hwy. 5.5 mi. NEScheelite, and deep |  | | Book (edition) | | hi the reno- rations }iavf‘ luM^n introduced, an im- been adopted, tlie talde for the and tln^ chapter... 1 . SiLDLVTLS. SILICA. TAGB Quartz 2 dd Opal 23 b * 2 Ceil oral . SILICATES. Remarks 212... MINERALOGY. Minerals. Minerals nT(‘, llio plants an...portant for (h(‘ imdal they (‘ontain. gentn-ally in an impure state from ili(‘ |)i'^"s<,!uee of oilier minerThe...tlak(‘S when it snows; the stre.ams bia^ome coated with an aggregation of crystals called ico and wnudows are |  | | Book (volume) | | variegated colours. About one and a Sutherland. an outlier half miles south of Cape Wrath, near Torridon...filamentous net-work is here brown. of Ayrshire. At Lagg Quarry, Fisherton, Ayr. structure is yellow or brown,...porphyritic stone. : : Liulithgowshire in an opening near the old quarry of Kirkton, masses in limestone of...attention to Mineralogy. During the time that has an exceptionally large number of specimens from almost...Museum of localities of Scottish Science and Art. In an Appendix references are given to information which |  | | Book | | For all thei.r skiUs and expertise - wor1h more th,an gold were the.y. We also must ac.knowle.dg-e, f,o...one's favourite specimens for this publication. Not an easy task. As the current chairman of SMLS I hope... BOL1WOODITE 7mm. Goanikontes Claim, Araandis, Swakopmund District, Erongo Region, Namibia. Photo: John Hall CALCITE...and Wales, and gradually extended to the Lake District and Scotland. Later on, SMLS organised many overseas...hydraulic shaft in the Smallcleugh Mine and we bought an inflatable dinghy so we could land on Sgurr nam Boe |  | | Book | | your own tumbling and grinding machineto cutting an emerald !The extensive reference section describes...mineral-collector and the experienced lapidary for whom itwill be an invaluable work of reference. FOKRieterehee 543...Left: Magnificent hexagonal crystals of chaiybite, an iron carbonate. The triangular 'growth shadows' that...are visible represent the form of the crystals at an earlier stage in th eir de veiopm en t This book...things, such as the wings of butterflies, can show an incomparable purity and brightness. In this connection | | | Book | | your own tumbling and grinding machine to cutting an emerald! The extensive reference section describes...a... “he experienced lapidary for whom it will be an invaluable work of reference. LIBRARY CHICAGO PUBLIC...eft: Magnificent hexagonal crystals of chalybite, an iron This book has several purposes: to introduce...are visible represent the form of the crystals at an earlier stage in their development fashioned gems;...things, such as the wings of butterflies, can show an incomparable purity and brightness. In this connection |  | | Journal (article/letter/editorial) | | silica coating on young basalt from Kilauea, Hawaii, as well as hyalite (opal-AN), silica sinters, and...silica gels and silicic acid. Pulse delays of up to an hour were employed for silica samples with slow spin...secondary phase in various geological environments. Opal is common in neutral-pH hydrothermal settings, where...coatings formed by acid-sulfate alteration of Hawaiian basalt. NMR has been applied to various aspects of the...reported an additional, smaller peak due to silicons with single attached OH groups (Q3) in some opal-CT samples |  | | Book (edition) | | ■ THE MOSCOW OPAL MINES 1890 to 1893 (The First Commercial Opal Mines in the Ujiiled States) Mon Brockett...$3.00 . ■ The Moscow Opal Mines—1890 to 1893 (The First Commercial Opal Mines in the United States)...United States of America U.S.A. OPAL COUNTRY (Precious Opal near towns located on map) OPALS "found...COlFA* -rftO Y PjiLtiM • GtntSEE • LSi/is to'v LOST OPAL MINE on "high hill opposite Lewiston, Idaho." Discovered...run." May, 1896. TH^ HOSCOW OPAL MIA/e? The opal is about 3/8 of an inch in diameter and from the |  | | Journal (article/letter/editorial) | | Impactite Tektite Frictionite Fulgurite Buchite Opal Glass properties a b s t r a c t Vitreous materials...Compared to industrial glasses, natural glasses have an essential advantage in terms of their lifespan in...of a final toxic-waste deposit. The development of an adequate technology for final waste disposal is a...position of natural non-crystalline solids such as opal, amber, kieselguhr or kerogen within the group of...formed completely differently. Due to the impact of an extraterrestrial body on the surface of the earth |  | | Book | | in as Mineralogy. on an the more enquiring without for this ele- an going purpose, advantages...indebted friend Mr. on distort their features in to an the whose and other ERRATA. Page 28 32 Error...Error. Line 13 Guidean 30 Swan hard | an where, ? e’f 73 1 80 30 entaille 86 13 it is...and coloured mode of or by and its of for- An- Cinerary 28 V. general—Rock-Crystal—Bristol ... . XI CONTENTS. LETTER Silex XL Resinite—Opal—Hydrophane, Pitch-stone—Menilite . LETTER Jasper—White |
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Basalt quarry, Klöch, Südoststeiermark District, Styria, Austria