 | | Journal (issue) | | Stockton and D. Vincent Manson 80 Emeralds of Colombia Peter C. Keller NOTES AND NEW TECHNIQUES REGULAR...description of mining and marketing activities in Colombia, are discussed in Dr. Keller's article i n this...six oxygens surrounding the iron in the geometry of an octahedron. Chromium 3 + produces the pattern shown...O5HgO] H ) ~ is blue because it contains copper as an essential constituent. Although other natural materials...be made to look like turquoise by the addition of an appropriate dye, it is easy to distinguish such materials |  | | Book | | Dcsautels is an internationally known gemologist and a former curator of the Department of Mineral Sciences... m •R '^\ ^ *r * sftS^^^iki An eight-inch crystal of topaz (ri^ht). encrusted ...flecked with yellow means "blue stone" pyrite (left). An opaque mixture of minerals, A four-inch lapis ...color and is facets (above). displayed EMERALD An uncut emerald three and a half inches high glows... known several colors. Like as jade — one — OPAL of two exhibits most other opaque gems, jade |  | | 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...Panagiotis Voudouris is Professor of Mineralogy at the Department of Geology and Geoenvironment, National and Kapodistrian...Professor in Economic Geology-Geochemistry, at the Department of Mineralogy, Petrology, Economic Geology, School...collaborative research projects worldwide. Ian Graham is also an Associate Editor of Mineralogical Magazine and the |  | | Book (edition) | | of meriting the acceptance of this Dictionary as an international reference source for the gemological...against overwhelming odds directed the early growth of an unique institution. As in the educational development...by the definition. For example: “African jade’ is an incorrect term for green grossularite, as stated...The dictionary’s use as a gemological directory. An effort has been made to include the names, descriptions...(ab”a-lo’nee). The mollusc Haliotis, also known as an ormer or ear-shell. From Pacific waters of California |  | | Book (edition) | | gemstone, strikes any boundary of that gemstone at an angle greater than its critical angle. Total reflection...totally reflected until it strikes a boundary at an angle less than the critical angle, in which event...(3rd Edition, Revised 1944) by Robert M. Shipley. An Encyclopedia of Gems (1944) by Henry E. Briggs. Dictionary...of meriting the ac¬ ceptance of this Dictionary as an international reference book for the gemological...by the definition. For example: “African jade” is an incorrect term for green grossularite, as stated |  | | Journal (issue) | | the U.S.A. 05 0 74470 02033 2 UNM’s HARDING MINE Exploring Plentiful Pegmatite 2 ROCKNGEM.COM ...With WorldWide Popularity 20 NEW MEXICO’S HARDING MINE The Must-See Pegmatite of the West Steve Voynick...received a shipment of High Grade Welo opal from Ethiopia-posting new opal parcels daily. Please call or order...2020 TOURMALINE with ALBITE and QUARTZ Himalaya Mine, San Diego County, CA Watercolor by Frederick C...2020 7 Covington Has Moved! ROYAL PEACOCK OPAL MINE Dig your own Virgin Valley Fire Opals ALL YOU |  | | Book (edition) | | of meriting the acceptance of this Dictionary as an international reference book for the gemological...by the definition. For example: "African jade" is an incorrect term for green grossularite, as stated..."a" alone should be sounded as the "a" in "cat/* An "e" following a vowel indicates a long sound for...emphasis. dictionary's use as a gemological directory. An effort has been made to include in alphabetical order...(ab"a-lo'nee). The mollusc Haliotis, also known as an ormer or ear-shell. From Pacific waters of California |  | | Book | | Danilo Bersani Peter Vandenabeele Gems and Gemmology An Introduction for Archaeologists, Art-Historians and...Heritage Science Series Editor Peter Vandenabeele Department of Archaeology Ghent University Ghent, Belgium...Bersani • Peter Vandenabeele Gems and Gemmology An Introduction for Archaeologists, Art-Historians and...Gemstones (DANAT) Manama, Bahrain Danilo Bersani Department of Mathematical, Physical and Computer Sciences...Gem Lab Lucerne, Switzerland Peter Vandenabeele Department of Archaeology Ghent University Ghent, Belgium |  | | 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) | | M. F. Hammer, Natural History Museum Vienna, Department of Mineralogy and Petrography Show case with...known of all is the famous ,,Emerald-Hand stein", an assemblage of emerald crystals from different Colombian... Among them was the "Vienna I mperiaJ Opal", an precious opal found in 1672 in Dubnik (former Czerwenitza)...Slovakia, with 594 grams, till now the biggest from an European occurrence. Natural Histoiy Museum, Vienna...c:> Colombian emerald "Handstein" from Chivor/ Muzo, Colombia. Dimensions of the sample: approx. 17 x |  | | Journal (issue) | | pyrope-spessartine-grossular garnet • New plastic opal imitation from Kyocera • Natural blister pearl from...“bimineralic” inclusion in diamond • Agate-like banding in opal • Dendritic inclusion in Cambodian sapphire • Green...Liddicoatite exhibit • Mexican and Australian opal outlook • Indonesian opal • Cultured pearl update • Secondary...samples from GIA’s research database, the authors offer an unrivaled gemological characterization of these remarkable...carats, a new Kyocera plastic imitation opal, and a real curio: an extraordinary natural blister “pearl” |  | | Book | | 44 Beryl 50 Corundum 56 Garnet 61 Quartz Gems 70 Opal 74 Topaz 78 Jade 81 Tourmaline 84 Feldspars 87 Pearl...Index Introduction A very thin slice of gabbro, an igneous rock from Point Sal, California, reveals...history. Even today nothing creates quite as effective an image of pure, tangible, concentrated value as a...involved can sometimes make buying jewelry appear to be an expedition into financially perilous territory, fraught...consumer-oriented. Its main purpose is to present an overview of the entire field of gemstones and to |  | | Book | | the field, the home laboratory, and the operating mine or mill. Ultraviolet light, in the hands of geologists...and have made virtually no use of fluorescence as an aid to identification. In this book, the fluorescent...each color—enable the user to turn his UV lamp on an unknown mineral, note its glowing fluorescence, and...contribution to science. A special acknowledgment to an ultra-violet pioneer THOMAS S. WARREN of San Gabriel...take with them into rough country. Pioneering in an uncharted field, he worked out circuitry, designed | | | Book | | ultraviolet’s many uses in the laboratory, and the operating mine or mill. field, the home Ultraviolet light, in...and have made virtually no use of fluorescence as an aid to identifi- cation. In this book, the fluorescent...each color—enable the user to turn his UV lamp on an unknown mineral, note its glowing fluorescence, ...probing deeper A special acknowledgment THOMAS to an ultra-violet pioneer S. WARREN of San Gabriel,...take with them into rough country. Pioneering in an uncharted field, he worked out circuitry, designed |  | | Book | | 142 144 146 150 152 154 Gold and power Opal Halley’s Comet opal Moonstone Shimmering colour Sunstone Labradorite...would soon be joining him in Paradise. Sometimes, an entire industry could arise from a gemstone’s associations...celebrities – all want to be photographed wearing an exquisite piece by one of the great names in modern...was given to Queen Mary of England in the 1550s, as an engagement present. It was later owned by Margaret...considered minerals. Certain substances, including opal and glass, resemble minerals in appearance, Mineral |  | | Book | | SMITHSONIAN CURATOR Dr. Jeffrey E. Post, Chairman, Department of Mineral Sciences and Curator, National Gem...142 144 146 150 152 154 Gold and power Opal Halley’s Comet opal Moonstone Shimmering color Sunstone Labradorite...not a story. A story has a beginning, a middle, and an end. This book is a map, a codex, a tool to help...ventromedial prefrontal cortex (vmPFC), that both assigns an object its worth, and determines the depth of your...actually evolved to look for colors, and to have an extreme emotional response to them. And even more |  | | 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 |  | | 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...a vein, although it gives a company the right to mine, should not be taken as justification for barbaric...conscience and good will, or as stockholders to encourage mine operators to arrange for specimen preservation in |  | 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) | | information should be addressed to the Permissions Department, John Wiley & Sons, Inc., 605 Third Avenue, New...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...the late Horace Winchell of Yale University, Department of Geology and Geophysics, and Brian J. Skinner...XV xvi Introduction international members and an affirmative response of at least two-thirds of those |  | | 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) | | successful completion of diploma examinations and is an invaluable tool for gemmology students. £25.99 ... Practical Gemmology DeeDee Cunningham NAG Press an imprint of Robert Hale - London First published... Clerkenwell Green London EC1R OHT NAG Press is an imprint of Robert Hale Limited www.halebooks.com...method that is followed in this book. We begin with an introduction to the planet Earth. The Earth t ...with a slight bulge around the equator, an ellipsoid, with an equatorial circumference of 40 075km and |  | | Book (edition) | | 1887 as the Manual of Mineralogy and Petrography. An edition number was given to some, but not all, reprintings...Dana's Manual of Mineralogy, has each been given an edition number as follows: 13, 1912 and 14, 1929...information should be addressed to the Permissions Department, John Wiley & Sons. Library of Congress Cataloging...Sons, Inc. PREFACE Mineralogy education courses an integral part of the undergraduate is geologists...mineralogy. Chapter 12 is an introduction to petrology, and Chapter 13 gives the student an introduction to the |  | | Book (edition) | | 1887 as the Manual of Mineralogy and Petrography. An edition number was given to some, but not all, reprintings...revision, as Dana’s Manual of Mineralogy, has been given an edition number as follows: Ze 73, 1912, and 14,...information should be addressed to the Permissions Department, John Wiley & Sons, Inc. ISBN: 0-471-25177-1...Crystal Chemistry,” can be viewed either as an introduction to or an overview of that subject, depending on...in this chapter more advanced and too detailed for an undergraduate mineralogy course. How- e ever, | |  | | Book (edition) | | 1887 as the Manual of Mineralogy and Petrography. An edition number was given to some, but not all, reprintings...revision, as Dana’s Manual ofMineralogy, has been given an edition number as follows: 73, 1912 and 14, 1929...information should be addressed to the Permissions Department, John Wiley & Sons, Inc. Library of Congress...America IO 9B 7 © 5 4) 32 PREFACE Mineralogy is an integral part of the undergraduate education of geologists...mineralogy. Chapter 14 is an introduction to petrology, and Chapter 15 gives the student an introduction to the |
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