 | | Journal (issue) | | YOUR ENGINE AS VOU W?lVE. THIS COMBINATION PRODUCES AN OIL SO HIGH IKI QUALITY IT LASTS MONTHS L0M6eR.J...Annual Imperial County Fair, County Fair Grounds, Imperial, California. March 3-6—Pima County Fair, Tucson...Tucson, Arizona. March 4-6—Annual Desert Gem and Mineral show and field trips, sponsored by Desert Gem and...at Rodeo Grounds, Chandler, Arizona. March 5—All-day trip to Asbestos Mine in Pinyon Flats. Meet at Palm...12-13—Tenth Annual Arizona Sno-Bowl Winter Carnival at Arizona Sno-Bowl, Flagstaff, Arizona. March 17-19—Tenth |  | | Report (issue) | | Contents 4 Map: Notable Opal Localities 50 BY BRUCE PAUL GABER 6 The Opal Enigma: Science, History...and Pins Afire: Play of Color in Opal BY MAX WEIBEL Sparkling Opal in Ancient Bones: Precious Relics...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...BY SI AND ANN FRAZIER BY PETER HUBER 64 Opal from Mexico: Unsurpassed Fire BY JURGEN SCHUTZ 18 Perfect |  | | 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...ee pon * : c= : an vi 5 = fii? i a j — » ya y _— ’* : i mine in. q)! Y eit iia...Furcron, Chief Geologist of the Department of Mines, Mining and Geology; on the State of Michigan by Robert |  | | Book | | • • • • ': . ·• Ranson1 , Jay E . Gems an d minerals of Arnerica 549 . 075 RAiJSO rti SAUSALITO...Rock-Hunter's Range Guide Petrified Forest Trails Arizona Gem Trails and the Colorado Desert of California...Gemstones and Minerals; Volcanic Flows; Values in an Outcrop 4. Preparation for Field Collecting 52...Petrified Wood 131 Characteristics of Agates; Opal, Queen of the Gems; Petrified Wood; Commonly Occurring...Minerals in L.\merica Alabama Alaska Arkansas Arizona California Colorado Connecticut Delaware Florida |  | | Journal (issue) | | Depending upon yield - 30 to 50% from our rough opal - and your market, profits should not be less than...cutting opal for profit, and WISH TO START YOUR OWN BUSINESS ask for our leaflet on how to cut opal more...-----~ HOLAN PTY. LTD (Incorporated 1959) 1 MINING OPERATIONS AT COOBER PEDY POSTAL ADDRESS: P.O ...2242, NORTH PARRANATTA 2151 , AUSTRALIA SEND ROUGH OPAL TO THE VALUE OF ------------------------------ $...accuracy, tenth-degree angle specifications and getting an even girdle line are covered by Thomas J. Ricks |  | | Book (volume) | | Plains, wells drilled deep into this unit provide an inexhaustible supply of cold artesian, Rocky Mountain...instance, a single Spodumene crystal from the Etta Mine near Keystone on the east side of the Mount Rushmore...beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream |  | | Book | | THE BOOK OF yJ An>> aT -v • J[. Illustrated. $9.^5 ISBN 0-8019-0964-3 OF VERMONT ENT OF LIBRARIES...as an authority in the lapidary field. Beginning with a description of agate, he proceeds to an interesting...varieties, with favorite location of quartz agate, opal wood — collectors. The petrified gems throughout... tell about other quartz varieties such as the opal, and petrified wood; and to give him the most complete...received, and one always fears that the name of an important adviser may be left out. However, in the |  | | Journal (issue) | | mmigration Ol ice. Opal Mines, Wbite Cllifs, New South Wales. Oourte8JI Special Opal Nuinber Granite and...National Honors A NON-T E CHNICAL MAGAZINE - -ON- MINING - PROSPECTING - GEOLOGY - MINERALOGY THE BULLETIN...======= r ROCH. S an d MINERALS A NON-TECHNICAL MAGAZINE --'ON-MINING-PROSPECTING-GEOLOGY- MINERALOGY...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 |  | | Book | | as a staff writer for Time. Paul E. Dcsautels is an internationally known gemologist and a former curator...Gemology. A recognized authori- numerous on gemstone mining around the world. deposits, he has published CONTENTS...LURE OF COLORED STONES 80 4 BUILDING A DIAMOND EMPIRE 3 CONTROLLING A Essays Rjches The ID the... 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 | | | Book | | recognized as an authority in the lapidary field. Beginning with a description of agate, he proceeds to an interesting...ties and forms of quartz gems other than agate, opal and its varieties, and petrified wood a great favorite...tell abot1t otl1er Cttiartz varieties st1ch as the opal, jasper, ancl petrified wood; a11d to give l1in1...received, and one al,vays fears that the na111e of an in1portant aclviser may be left out. Ho,vever, in...12 were also const1lted. Nlany other sot1rces in an extensive library on the st1bject were const1lted |  | | Journal (issue) | | Rings in white gold and diamonds with Ethiopian opal center stones by Van Cleef & Arpels. (Photo: Van...Industry News 18 8 ICA Congress Focuses on Ethical Mining and Fair Trade 12 ICA Poster Competition and Gemstone...Other Industry News from Around the World Ethical Mining and Fair Trade 18 Ongoing Studies on Challenges...Wollo Opals – A Powerful Source from Ethiopia Mining 38 Touring Mines in Brazil Gemology 50 Fluid Inclusions... ISSN: 1158934X To Subscribe to InColor, send an email to: ica@gemstone.org www.gemstone.org he |  | | Journal (issue) | | T. Trofimov Nikolay P. Yushkin John S. White (USA) English (Style) Design idea Layout Photo: Layout...John S. White (USA), Peter Modreski (USA), Edward Rosenzweig (USA), John F. Rakovan (USA) Dmitrii A. Kilpio...Almanac Mineral-Almanac Ltd, USA 10896 W. Beloit Pl. Lakewood, CO 80227, USA E-mail: minbooks@online.ru...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) |  | | Journal (issue) | | Zimbabwe | Chromiumbearing Translucent Green Common Opal | Blue Sapphires Reportedly from Azad Kashmir |...Silica Glass Sold as RockCrystal Balls | An Unusual Pink Synthetic Opal | Quench-Fractured Bicoloured Synthetic...courtesy of The Walters Art Museum 119 172 Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence...Cambridge, Massachusetts, USA Edward Boehm RareSource, Chattanooga, Tennessee, USA Maggie Campbell Pedersen...Emmett Crystal Chemistry, Brush Prairie, Washington, USA Emmanuel Fritsch University of Nantes, France Alan |  | 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...Lhoest: Liege, Belgium. John C. Lucking: Phoenix, Arizona. Emil Makovicky, Inst. of Mineralogy, Univ. of...Wallace: Dept. of Geosciences, University of Arizona, Tuscon, Arizona. John S. White: Stewartstown, Pennsylvania...Wendell E. Wilson: The Mineralogical Record, Tuscon, Arizona. Barry Yampol: Oyster Bay, Long Island, New York |  | | Journal (issue) | | U I D E TO MEXICO " \ I ^J \ J Published after an extensive two-year travel survey for up-to-date information...Telephone and Telegraph Services SEND ONLY \ to Mexico an enjoyable one eliminating problems which may arise...not a "story book" or just a list accommodations. An aid in selecting those sections of Mexico most interesting...book, The Romero Expeditions in California and Arizona, 182326. Both received their masters degrees at...the desert representative for Newsweek and proud of an article written for that magazine about desert: resident |  | | Journal (issue) | | PRICES ARE BASED AT $180.00 per ounce, we will make an adjustment of price on day order is shipped. Prices...rockhounds. Elsewhere in this issue, you will find an article about some of the many uses for this versatile..................... 16 A Method for Using Tecopa Opal by F.W. Seasholtz ................................less than 14"x27". The standard Genie comes with an 80 and 220 grit 6"x1~ Galaxy metal-bond diamond grinding...Studio City. Ca. Pl!Ny. .. a tTIIPt I 1 ..... , c..an San Glbriel. Ca. City, Nev. 6 - Martin's Postal |  | | Journal (issue) | | and the Thermal Properties of Gems D. B. Hoover Opal from Queretaro, Mexico: Occurrence and Inclusions...which little has been reported in recent years. After an initial burst of activity 100 years ago, the production...impeded their exploitation. This article, the result of an expedition to the deposits in 1981, chronicles the...Frazier, of Berkeley, California; and the Los Angeles County Museum of Natural History for their cooperation...have conspired to surround the mining and trading of these stones with an aura of secrecy and suspicion |  | | Journal (issue) | | scintillating colors of Australian opal come to us through the courtesy of the Opal Spectrum company. For details...Cover feature. And, for a fascinating look at opal mining , plus more pictures, turn to page 8. AND MINERALS...TX 78745 4 - JANUARY 1977 HOW TO CUT BRAZILIAN OPAL lapidary techniques for a new material by W.L Maison...and Barbara Thomas 32 TIPS ON BUYING AND CUTTING OPAL Advice from the professionals 34 ART NOUVEAU Easy-to-do...Gunther FEATURES 8 COO BER PEDY TODAY A visit to the opal mines by Lee Cross 15 INTERNAL STRUCTURES AND |  | | Journal (issue) | | metal-bond wheels are held on a heavy steel ring by an extremely hard. heat-treated nickel alloy plating...should be 25mm or more. If you want your stone to have an appearance like those pictured here, the sphere should...reverse the polishing instrutions. CROWN 1. Start with an 80 index gear. Cut the table to 50 percent of the...to produce all shapes of cabochons. Startin1 with an efficient diamond trim uw, then chan1es in seconds...After inquiring around, I was finally able to locate an art metal supplier who handles sheet pewter. I'll |  | | 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 | | eminent in set order with a the days, Empire began the who those who were their was unable...diamonds the British The been was of made an some set gold, studded sunshine, is, by was...those are of for of the “half- stone, immense an are these as to Others of the There trans-... Agate. November, Topaz. Emerald. June, The opal was, conceivable good it fancy which The is...precursor. The crowned every change of bad opal. an the daughters to curious consider people |  | | 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 | | 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...the story of stones with a beginning, a middle, and an end, because it has no beginning, and it has no end |  | | Report (issue) | | 19R4 Bahimore, Maryland 2 1st 1985 Tucson. Arizona 22nd 1986 Linle Rock. Arkansas 23rd 1987 ...consisted of technical sessions, a local field trip. and an optional three-day trip. All of the papers presented...hospitality room to test the efficacy of that sys tem. An optional field trip took 45 participants to mdusmal...tion ; Eagle-Picher Minerals, Inc.; the Northwest Mining Association; and the Society of Economic Geologists...markets. The estimated total value o f nonfue l mine ral productio n in Oregon in 1988 was $169 million |
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Empire Mine, Tombstone Mining District, Cochise County, Arizona, USA