 | | Book (edition) | | EDITION AREM, PH.D., FG.A. gem gemologists, 1977, jewelers, and gem collectors, dealers have relied...INTRODUCTION What / Gem? a / Scope of This Book / Is The Nature Gems of GEM SECTION 1 2 GEMSTONES...Rock Classification Gem Scarcity Intrusive Crystal 6 Growth Synthetic Gem 9 / Gemstones SOURCES...dealers are aware of the growing value of exotic gem species; the list of known taaffeites has thus grown...greater monetary reward than are the tists who gem scien- build detection equipment. Inevitably, a |  | | Journal (issue) | | Sapphires from Sri Lanka Kcirl Scl~metzerand Olaf Medenbach REGULAR FEATURES 112 120 124 131 Gem Trade Lab...Lab Notes Gem News Gemological Abstracts Book Reviews ABOUT THE COVER: The extraordinary play-of-color...Diffraction, one of the less common causes of color in gem materials, is described in this issue in the third...extensive listing of the known origins o f color in gem materials. The opal, from the Ditto 3 Harold &> Collection...pit. Virtually all o f the diamonds recovered are gem quality, although most are relatively small, averaging |  | | Book (edition) | | 1 2 The Geological Sources of Gems Crystalline Gem Materials 3 40 Part II 3 4 5 6 7 8 9 10 11 12 13...The Biological Gem Materials The Fashioning of Gemstones Value-Enhanced Gemstones and Gem Materials 292...library for virtually all sources. Derivations of gem and mineral names are not given; they can be found...not now considered valid or current. While many gem collectors collect mineral specimens too, the text...text for the 1994 edition. In this new edition, the gem testing section has been omitted; this information |  | | Book | | BUTTERWORTH-HEINEMANN GEM BOOKS DB ♦ ◊ HOOVER ♦ Butterworth-Heinemann Gem Books Edited by Peter...Nassau Gem Testing, 10th edn B. W. Anderson, revised by E. A. Jobbins Butterworth-Heinemann Gem Books...Data Hoover, D. B. Topaz. - (Butterworth-Heinemann Gem Books Series) I. Title II. Series 553.8 ISBN 0 7506...of South Africa 189 Saudi Arabia 190 Spain 190 Sri Lanka 190 Sweden 191 Thailand 192 Turkey 192 United...Read asked if I would write one of Butterworth's Gem Books, I chose topaz as the subject, because of my |  | | Book | | Bermanec Formation Conditions and 40Ar/39Ar Age of the Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas,...Antonio Langone, Ilaria Adamo and Gabriele Lanzafame Gem-Quality Tourmaline from LCT Pegmatite in Adamello...Fallick, Maria Tsortanidis and Andreas Lampridis Gem Corundum Deposits of Greece: Geology, Mineralogy...Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights into Their Origin...Cenozoic Alkaline Basalts of the Ratanakiri Volcanic Province (Cambodia), Southeast Asia—Trace Element Geochemistry |  | | Book (edition) | | complete cross index of familiar gem names. Information on each gem includes chemical formula, crystal...represent today's most sophisticated techniques for gem his own photography. three-year the exact color...clearly revealing the degree of birefringence in a gem, as well as any inclusions Some of the data provided...published before, such as the dispersion values for 15 gem materials. These values are calculated from...useful for gemologists. to Of practical interest to gem cutters isa special graph relating critical angle | | | Book (edition) | | complete cross index of f a mili ar gem names. Information on eac h gem includes chemical formula , c rystal...represent today's most sophisticated tech niques for gem photography. Resul ti ng from his own three-year...three-year effort, they show the exact color o f faceted gem stones while displaying to best advantage the cut...clearly reveali ng the degree of b1ref ringence in a gem , as well as any 1nclus1ons Some of the data provided...lished before, such as the d1spers1on valu es for 15 gem ma terial s. These values are calculated fr o m material |  | | Book | | GEMSTONES FOR EVERYMAN by the same author GEM TESTING {8th revised edition published in 19JI by...12^) A. Granite with topaz crystal B. Ceylon gem gravel C. Corundum group D. Chrysoberyl and spinel...Removing the overburden covering diamondiferous gravels on coast of South West Africa II ILLUSTRATIONS...copyright facilities. For the picture of Ceylon gem gravel I have to thank my old friend Mr. R. K. Mitchell...in certain of their varieties, quite important as gem materials. This may well astonish an innocent reader |  | | Report (edition) | | dmp.wa.gov.au/GSWApublications Cover photograph: Gem-quality, fancy yellow, rough, sawable diamonds (average...................... 21 East Kimberley Diamond Province.................................................................... 24 East Kimberley Diamond Province................................................................... 24 North Kimberley Diamond Province ................................................................... 26 West Kimberley Diamond Province.............................................. |  | | Book (edition) | | Taylor, Correspondence Course Diamond HANDBOOK OF GEM IDENTIFICATION 10th Edition Richard T. Liddicoat...may be encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY ...Founder, Gemological Institute of America and American Gem Society ASSISTED BY The late ANNA McCONNELL BECKLEY...Edward H. Kraus, coauthor of Mineralogy and Gems & Gem Materials; Dr. G. F. Herbert Smith, author of Gemstones...developments have occurred in the production of synthetic gem materials. These and other pertinent data have been |  | | Book (edition) | | is collecting residual heavy minerals in loose gravels on slopes or in streambeds, a shovel, a sieve,...thousands of years of erosion. Diamondbearing gravels in many parts of the world are thought to have...sands 4g? Environment: Mainly in grains and and gravels. Crystal description: Crystals (octahedrons and...of the diamonds found are said to be suitable for gem use; the balance are used in industry for tools and...—it also occurs in thin veins. Madagascar and Sri Lanka (Ceylon), where it forms large pure masses in |  | | Book (edition) | | are few, with Monte Somma and Germany's Eifel District (around the Laacher See] preeminent sites. Contact-metamorphic...dedeposit of heavy mineral residues in stream gravels]. A low-grade deposit (one whose mineral deposits...thousands of years of erosion. Diamond-bearing gravels in several parts of the world (the Amazon and Orinoco...described as gemmy because of their resemblance to gem- — stones. Fluorescence and Phosphorescence: The...nuggets mined from a mafic rock in in sands and gravels. South Africa and one of the sought-after metals |  | 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) | | British Columbia NF Labrador (part of Newfoundland Province) MB Manitoba NB New Brunswick NF Newfoundland...Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral...localities, AZ; Calico district, San Bernadino Co., Cerro Gordo(*), Inyo Co., Bodie district, Mono Co., and other |  | | Book (edition) | | bfr encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY Founder...Founder, Gemological Institute of America and American Gem Society ASSISTED BY anna McConnell beckley Research...Kraus, co-author of MinV eralogy, and Gems and Gem Materials; G. F. Herbert Smith, author of Gemstones...especially distinctive from those of the entire gem mineral species under which the properties IX are...macroscopic inclusions in sagenitic quartz and other gem¬ stones. S.G. 3.0-3.2. R.I. 1.61/1.64. acute. Sharply |  | | Book (edition) | | REFERENCE BOOK (1947) By Robert M. Shipley HANDBOOK OF GEM IDENTIFICATION (2nd Edition, 1948) By Richard T....preparation) By Dr. Sydney H. Ball PROPERTIES OF GEM VARIETIES OF MINERALS (posthumously 1948) Dr. Edward...may be encountered in English literature or in the gem, jewelry or art trades. BY ROBERT M. SHIPLEY ...Gemologicat Institute of America and American Gem Society ASSISTED BY ANNA McCONNELL BECKLEY Research...co-author of : ; ; M eralogy, and Gems and Gem Materials; G. F. Herbert Smith, author of Gemstones |  | | Book (edition) | | expressed in abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture)...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....the revolution in 1997. Its mineral rich Katanga province was renamed Shaba by Mobutu, and is now the Katanga...Katanga administrative region again. The former Kivu province is now divided to three regions: INTRODUCTION...conditions in the gold-bearing "greenstone" in Abitibi province in northern Ontario and Quebec. Some genetic problems |  | | Book (edition) | | portion of an ore that is not economically valuable. gem A mineral that possesses intrinsic value because...Colorado at the Pelican Dives m.ine, Silver Plume district, and at the Little Emma mine, Clear Creek County;...lode, Summit County, and in the Cripple Creek district. It is also found in Canada; Mexico; Bolivia;...Califo1nia; in sodalite-syenite in the Julianehaab district, Greenland; in the liparite lavas of the island...slate and metamorphosed dolomite in the Beiyun-Obo district, Inner Mongolia, China, associated with aegirine | | | Book (edition) | | portion of an ore that is not economically valuable. gem A mineral that possesses intrinsic value because...Colorado at the Pelican Dives mine, Silver Plume district, and at the Little Emma mine, Clear Creek County;...lode, Summit County, and in the Cripple Creek district. It is also found in Canada; Mexico; Bolivia;...California; in sodalite-syenite in the Julianehaab district, Greenland; in the liparite lavas of the island...slate and metamorphosed dolomite in the Beiyun-Obo district, Inner Mongolia, China, associated with aegirine |  | | Book | | International recognition has come to him from twelve gem and mineral organizations on four continents. Professor...collected and prospected in nearly every state and province in the United States and Canada. A Fel¬ low of... CONTENTS Preface 9 Mineral Collecting 13 Gem Cutting 18 Identifying Minerals 32 Mineral Terms...Mining 272 Index 310 PREFACE The mineral and gem hobby continues its amazing growth— especially in...learning about miner¬ als, crystals, gems, the art of gem cutting, rocks, mining, mete¬ orites, and the basic | | | Book | | International recogniLion has come to hitn fro1n gem and mineral organizations in thirteen countries....collected and prospected in nearly every state and province in the United States and Canada. A Fellovv of... CONTENTS Preface 9 Mineral Collecting 13 Gem Cutting 18 Identifying Minerals 32 Mineral Terms...learning about 1ninerals, crystals, gems, the art of gem cutting, rocks, mining, meteorites, and the basic...pick hammer, crack hammer, chisels, long-handled gem scoop, eye shield. The rock pick hammer is the most |  | | Book (edition) | | f'ogg . 25. 495. and A.A. Hayes ( 1 846) Amer. J. Sri. ser. 2 , 1 . 122. show it to be chabazitc. Named...Alisonile. near Cu 6 PbS,. F. Field ( 1 859) A111a. J. Sri. 27. 387. (TL) Mina Grande. Coquimbo. Chile. Probably...Caillcre and S. Hcnin ( 1950) Compt. Rend. Arnd. Sri. Paris. 230. 668: S . Caillcre. A. Mathieu-S icaud...Fe3 • .Mg)iPO.) 3 • A . Damour ( 1 847) CR. Aca(/. Sri. Paris. 25, 670; ( 1 848) Ann. Mines. 13, 34 1 ....Em1ilova. and E.S. Rudnitsknyn ( 1968) 8111/. A rne/. Sri. URSS. no. 6. p. 29 [Amo1-1oxp113orn;rna ] . An nJuminian |  | | Book | | Crocidolite or blue asbestos comes principally from Cape Province, Transvall, South Africa, where it occurs usually...County, California; the Tintic district, Utah; and the Eureka district, Nevada. Vanadinite is a secondary...Sandstones and grits of England, Switzerland, France, Sri Lanka, and Brazil; blacksands in many Baddelyite Zr0...Russia (Ural), gold sands Sri From igneous and metamorphic rocks; altera- Lanka, Brazil, Swe- Accessory...) Beryllium, stones gem ( Betafite (U,Ca) 2 (Nb,Ta,Ti) 2 6 -(OH) Lanka, Brazil, Colombia, South |  | | Book (volume) | | student of the earned his relatively diploma Gem soon Cutting Most persons involved in to the...related that project. Before the publication of Gem Cutting book, that field had been relatively devoid...his skills in to Accumulation of the Sinkankas Gem 1982. even more cut design special equipment ...Sinkankas, to half century, that scenario has Gem dramatically. was aware was In the last preserved...Sinkankas and ultimate of engraved who in and the gem The monumental work that lapidary work, value |  | | Book (edition) | | classified in three groups: (1) gem stones, (!!) common corundum, (8) emery. The gem stones include the transparent...mellar structur& il'I due to t.wiunit1g. Ouaf.lage.-"·Gem varieties break with a conchoidal fracture, but cnmmon...submitted for identification from tl1e Laurens district, South Carolina. Systematic mining for corundum...corundum, as distinguished from emery and the gem varieties, was first started at Corundum Hill, North Carolina...associated with granite, which underlies the corundum gravels. The u, ABRASIVES 7 schist is decomposed to |  | | Book (edition) | | ground, on the one hand, like the facet of a cut gem; or, on the other hand, the splintery uneven surface...phenomenon of total reflection is taken advantage of gem stones. According to common practice such a stone...the surface on top light that enters the stone gem increases with its index of refraction. Two stones...species, and by the same variety in different The gem& are in general positively electric only when polished;... PART IV. DESCRIPTIVE MINERALOGY It is the province of De506. Scope of Descriptive Mineralogy. scriptive |
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