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| DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Preliminary Grade and Volume Model of Alluvial Sn-Au...with the North American Stratigraphic Code. Any use of trade, product or firm names is for descriptive purposes...are made during this study of Sn-Au placer deposits: Grade and volume model of Sn-Au placers is developed...(fig. 1) The volume of Sn-Au placer deposits is extremely variable 80 percent of the deposits have volumes...between 8,800 m^ and 91 million m^ (fig. 2) 80 percent of the deposits have Sn grades between 0.15 and 2.5 |
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| | 111 112 | JOGS SHOW JOGS SHOW | 113 LIST OF EXHIBITORS 14K-18K GOLD EARRINGS 36 NE 1st Street...http://14k18kgold.com Booth#: N1023 Manufacturer & wholesaler of 14K and 18K gold earrings. 8 GEMS IND. D-38, 1st...480-437-0411 http://www.ajemfg.net Booth#: W715, W717 One of a kind handmade silver jewelry with semi-precious...com/adaia.minerals Booth#: TW8 Wholesaler & Retailer of gold-plated jewelry, cabochons, minerals & semi-precious...designer of silver, stainless steel, fashion, and marcasite jewelry with gemstones. LIST OF EXHIBITORS |
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| | 105 106 | JOGS SHOW JOGS SHOW | 107 List of Exhibitors 8 GEMS IND. D-38, Anaj Mandi Chandpole...and carvings. ABDIAZIZ MOHAMED YOUSUF Bole Suz City Kebele 07 HMO 2256 Addis Ababa, Ethiopia 14 Ethiopia...480-437-0411 www.ajemfg.net Booth#: W715, W717 One of a kind handmade sterling silver jewelry with precious...designer of silver, stainless steel, fashion, and marcasite jewelry with gemstones. List of Exhibitors...Booth#: Tent G7 Brazilian minerals and specimens, citrine, crystals spheres and points, tourmaline and aquamarine |
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| New York, N.Y. 10007 All rights reserved. No part of this publication may be reprinted, reproduced, trans¬...permission of the publisher. International Standard Book Number: 0-8096-1826-5 Library of Congress Catalog...pictures of gold-in-quartz, smithsonite, stilbite, and wulfenite on the front cover and the picture of the...courtesy of John Grieger of Grieger’s, Inc., from specimens in his personal collection. Library of Congress...ISBN 0-8096-1826-5 PRINTED IN THE UNITED STATES OF AMERICA Title. Contents Preface 6 1. In the |
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| Free Orders Only: (877) 548-1439 t s e b e h t r fo of s u Visit n io t c e l se ! e t ngi u h S JOGS...LEARN MORE JWL.COM | 833-JWL-COIN Consumer Guild of America Diamond Member P RO C E S S E D B Y cr...GEMFAIRE.COM 2018 Gem Faire Schedule Exhibiting? age of: rs can take advant Gem Faire exhibito oth prices...CA Pleasanton, CA Reno, NV Eugene, OR Salt Lake City, UT Puyallup, WA Hillsboro, OR San Diego, CA Santa...Santa Barbara, CA Costa Mesa, CA Tulsa, OK Salt Lake City, UT JOGS JOGSSHOW SHOW| | 125 126 | JOGS SHOW |
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| corner of Kimball Co. where it overlooks both Colorado and Wyoming. The subsurface rock strata of the entire...Mountains as they rose during the Larimide revolution of 100 million years ago that closed the Mesozoic era...west reaches rise to the high, arid sagebrush plains of eastern Wyoming, disclosing spectacular bedrock formations...Nebraska contains most of the gem fields in the state, insomuch as both the Black Hills of South Dakota and...scenic Badlands thrust long spurs into this part of the state. In this rough, uncurried region are found |
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| JOURNAL OF THE GEMOLOGICAL INSTITUTE OF AMERICA Characterization of Montana Sapphire Morphology of Colombian...FEATURE ARTICLES 2 p. 20 Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock...characteristics of the three secondary sapphire deposits in the state of Montana, as well as the properties of these...sapphires (unheated and heat-treated). 46 Morphology of Colombian Emerald: Some Less Common Cases and Their...and Gérard Martayan Evaluates the growth mechanisms of special morphological features in Colombian emerald |
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| images:Tourmaline: courtesy of Ian Kalway. Sapphire and ruby: courtesy of Jeffrey Scovil, ©Primagem. ...Columbia As Demand Rises Gemmological Association of Great Britain Appoints New CEO Petra Diamonds Sells...Million Singapore Museum Displays ‘Art & Science of Gems’ Exhibition Tanzania Aiming To Increase Gemstone...Bonhams London Auction ‘Jubilee Ruby’ Is Highlight Of Christie’s Sale, Selling For $14 Million Trade Shows...branding origins of gemstones can lead to confusion related to the appreciation of the quality of the material |
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| and · Official J ourndl of th~ Rocks and Mintrdls Association • 1 A Magazine for Mineralogists, Geologists...on the third floor of 110 Wall Street, New York 5, which is at the East River end of the street and readily...my large private collection, formed over a period of th irty years, and containing fine specimens from...localities, as well as from many other parts of the world. Most of them were purchased from mineral dealers...many countries. I doubt whether so many specimens of equally high quality have been available recently |
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| Spann unless otherwise noted Figure 2. The view of the valley bordering Petersen Mountain is absolutely...568 ROCKS & MINERALS T he third annual gathering of the Women’s Mineral/ Mining Retreat started on 29...Fong Walker, and Lisa Bennett. This is a fun meeting of feminine mineral minds at a famous mineral locality...Gail Spann. This year’s excursion was to the top of Petersen Mountain (5,874-foot elevation) on the Nevada/...Paul Geffner and miner Rick Kennedy. 30 miles north of Reno. The locality is referred to as “Hallelujah |
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| • • AMETHYST URINE • • BERYL MOONSTONE CITRINE GEM HUNTERS GUIDE by Russell P. MacFail The...The land. oflF of thinks truth that is country are hun- in this dreds of areas where beautiful... to States contain a United plains of the great variety of gem minerals waiting informed collector...been found this country, is the its locations of in key which unlocks this treasure chest for the...only provides a prehensive listing and description of the locations in which these gems are cross-indexes |
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| Sixty Years of History and History-Making Richard T. Liddicoat FEATURE ARTICLE Color Grading of Colored...given for bulk orders of 10 or more of any one issue. A limited number of back issues of GeJG are also available...inquiries regarding subscriptions and the purchase of single copies or back issues to the Subscriptions...obtain a Japanese translation of Gems a) Gemology, contact the Association of Japan Gem Trust, Okachiniachi...a) Gemology welcomes the submission of articles on all aspects of the field. Please see the Suggestions |
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| Gem Stones of the United States GEOLOGICAL SURVEY BULLETIN 1042-G A CONTRIBUTION TO ECONOMIC GEOLOGY...GEOLOGY GEM STONES OF THE UNITED STATES By Dorothy M. Schlegel ABSTRACT Many semiprecious, but few precious...durability, and rarity are the most important qualities of a precious gem. Gem stones are distinguished by their...parting, hardness, specific gravity, luster, index of refraction, transparency, and dispersion. Gems are...carat, one-fifth of a gram or 200 milligrams, is the unit of weight measurement. The color of four popular |
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| THE HISTORICAL NATURE OF METAPHYSICAL ROCKS + TODAY’S USES THE EARTH’S TREASURES • MINERALS & JEWELRY...Attending the Tucson Gem & Mineral Show THE ART OF COLOR ROCKY BEGINNINGS ROCK COLLECTING DOS AND...high efficiency motor provides a generous amount of power. The water cooling system features 8 valves...Beckett Media, LLC. All rights reserved. Reproduction of any material from this issue in whole or in part...change without notice. ON THE COVER This specimen of agatized coral was collected at Ballast Point in |
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| The world of ROCKS AND MINERALS $8-95 The fascinating hobby of collecting stones and minerals has...the cut or polished specimen is of astounding interest. Although many of the stones appearing in these...access to all of them. Moreover, these photographs are mostly of superb specimens, of a standard rarely...Every collector of rocks and minerals will want to add this book to his library. Each of the 108 specimens...color, luster, common form, sources, and cutting—much of this information is necessary to home jewelry-makers |
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| simply push a button to minimise the effects of a range of electromagnetic interference, including power...LIMITED 11 8 Hayward Avenue, Torrensville South Australia 5031 Telephone: (08) 8238 0888 Facsimile: (08}...more than monetary value with it S LIP INTO A PAIR OF FOSSILISED FAIRY BOOTS 100,000-year-old treasures...definitely worth your attention GLEN INNES - STILL A SLICE OF ROCKHOUND HEAVEN The rewards for gem and mineral...save big dollars subscribing 30 PLAY IT SAFE Word s of wisdom before you rush off on your next gold prospecting |
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| ground balance modes: Fixed/Tracking. Wllh lhe tllck of a switch, lhe GP 3000 has aulomallc ground balance...aulomallcally compensales for changes In the mineralisation of lhe ground and maintains maximum detecting deplh...mineralised soil.) Automatic Tune Control - With the push of a butlon the deleclor automallcally scans to select...select the optimum frequency to overcome lhe effecls of eleclrical inlerference. All Metal Mode / Disc. Switch...objecls, or use All Melal mode for easy delecllng of all metal largets. Soil Condition Switch - Opllmlses |
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| Survey Report 102 Industrial minerals and rocks of Victoria I. W. McHaffie & R. W. Buckley 1995 Geological...Survey Report 102 Industrial minerals and rocks of Victoria I. W. McHaffie & R. W. Buckley 1995 Bibliographic...and rocks of Victoria. Geological Survey of Victoria Report 102. Crown (State of Victoria) Copyright...Geological Survey of Victoria ISSN 0817 4725 ISBN 0 7306 7474 6 Keywords: Victoria, industrial minerals...Information Victoria, 318 Little Bourke Street, Melbourne Victoria 3000. or Business Centre, Department of Agriculture |
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| Additional copies of this publication may be obtained from: North CarOlina Department of Natural Resources...examination, survey, and mapping of the geology, mineralogy, and topography of the state, including their industrial...the section promotes the wise conservation and use of mineral resources by industry, commerce, agriculture...general welfare of the citizens of North Carolina. The Section conducts a number of basic and applied...rock and mineral samples submitted by the citizens of the state and providing consulting services and specially |
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| When you wear jewelry set with TITANIA. After years of experiments, synthetic Rutile is now available in...been given the name of "TITANIA." When viewed under proper lighting, round brilliants of TITANIA appear to...polished bits of rainbows. Certain remarkable optical properties make this extreme refraction of light possible...AMETHYST EMERALD RUBY, SAPPHIRE DIAMOND TITANIA ' INDEX OF REFRACTION 1.544 1.564 1.760 2.417 2.605 CHROMATIC...014 .018 .063 .300 (APPROX.) - 2.901 The ability of a gem to break up light into its component colors |
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| at depths others will miss. Look at the features of the GP extreme: • Superior depth to find more gold...magnificent sapphires A WHIMSICAL LOOK AT THE HISTORY OF THE GROAT 0 why fourpenny pieces kept coming and...pre-decimal coins BOOK OFFER A selection of classics about the golden age of Australia's prospecting pioneers...TUMBLED TREASURES Patrick O'Brien reveals his method of polishing stones 34 WHAT'S ON The events calendar...ISSUES A new and updated selection of what 's available from the depths of the warehouse 36 DETECTING THE |
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| Prairie State, Illinois exhibits a length of 378 miles and a width of 210 miles, with its 56,000 sq. mi. sloping...more than 275 rivers, the state is bounded along ¾ of its circumference by navigable waters, primarily...along the northern borders, rising only to a altitude of 900 to 1,000 feet above sea level. Though well endowed...the Lead-Zinc mining dists. of northwestern Illinois, the glacial drift of the Late Pleistocene Wisconsin...Wisconsin glaciation, the bluffs and detritus of the Ohio and Mississippi rivers, and in the southern Fluorspar |
 | | Book (volume) |
| Prairie State, Illinois exhibits a length of 378 miles and a width of 210 miles, with its 56,000 sq. mi. sloping...more than 275 rivers, the state is bounded along ¾ of its circumference by navigable waters, primarily...along the northern borders, rising only to a altitude of 900 to 1,000 feet above sea level. Though well endowed...the Lead-Zinc mining dists. of northwestern Illinois, the glacial drift of the Late Pleistocene Wisconsin...Wisconsin glaciation, the bluffs and detritus of the Ohio and Mississippi rivers, and in the southern Fluorspar |
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| ....................................... 7 List of Exhibitors (Main) ...................................................................... 100 List of Exhibitors (SuperStart) ........................... As you may have noticed by the increase in size of the directory you are holding, the JOGS Tucson Show...GEMFAIRE.COM 2017 Gem Faire Schedule Exhibiting? age of: rs can take advant Gem Faire exhibito oth prices...CA Del Mar, CA Pleasanton, CA Reno, NV Salt Lake City, UT Puyallup, WA Hillsboro, OR Eugene, OR San Diego |
 | | Journal (issue) |
| gives you the choice of DD or monoloop style configuration, with just the flick of a switch. CALL NOW...pty Ltd PO Box 537, Torrensville Plaza, South Australia 5031 i" MINELAB Visit our website www.minelab...DETECTING WITH VANCE AND GWENDA Caught detecting north of the Gascoyne during cyclone season BOOK REVIEW The...long-awaited third book in Tony Matthews· trilogy CITY KIDS AND SAPPHIRES Rockhounding isn't for everyone...little-known NSW goldfield near Yalwal REMINISCENCES OF A 1960'5 PEBBLEPUP Growing up with dedicated rockhound |
