 | | Journal (article/letter/editorial) | | Miocene Petrified Wood from Central Washington State, USA George E. Mustoe 1, * and Thomas A. Dillhoff 2 1...Bellingham, WA 98225, USA Evolving Earth Foundation, P.O. Box 2090, Issaquah, WA 98207, USA; tdillhoff@evolvingearth...interbeds of the Columbia River Basalt Group (CRBG) in central Washington State, USA. These fossil localities...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 |  | | 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... IDAHO f 2 3 (z i • Te*o* I o "Shoshone County, Idaho man picks up opals while out hunting a horse...COlFA* -rftO Y PjiLtiM • GtntSEE • LSi/is to'v LOST OPAL MINE on "high hill opposite Lewiston, Idaho." Discovered |  | | 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...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE |  | | 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...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE |  | | Book (volume) | | Plains, wells drilled deep into this unit provide an inexhaustible supply of cold artesian, Rocky Mountain...cuts, breaks, river banks, stream beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma...Fm. On Elm Cr. Near its jct. with the Missouri River (about 15 mi. S of Chamberlain) gray Barite rosette...rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides, ridges...tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream |  | | Book | | • • • • ': . ·• Ranson1 , Jay E . Gems an d minerals of Arnerica 549 . 075 RAiJSO rti SAUSALITO...Petrified Forest Trails Arizona Gem Trails and the Colorado Desert of California High Tension (A Biography)...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...\merica Alabama Alaska Arkansas Arizona California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho |  | | 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 (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) | | Denver Federal Center, Denver, Colorado 80225 2 University 3 of Colorado, Department of Geological Sciences...Sciences, Emeritas, Boulder, Colorado 80309 Physics Department and Remote Sensing Center, Naval Postgraduate...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 |  | | 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) | | Feature Articles 490 Green-Luminescing Hyalite Opal from Zacatecas, Mexico By Emmanuel Fritsch, Peter...colour appearance of this rough and cut hyalite opal from Zacatecas, Mexico, is due to its green daylight-induced...Laguna Beach, California, USA. Photo by Orasa Weldon. 532 Conferences Sinkankas Opal Symposium|AGA Las Vegas|Mallorca...Edward Boehm, RareSource, Chattanooga, Tennessee, USA; Alan T. Collins, King’s College London; John L....Emmett, Crystal Chemistry, Brush Prairie, Washington, USA; Emmanuel Fritsch, University of Nantes, France; | | | 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 |  | | 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 (issue) | | an cA e!magazine {or c6rCinerologist, Geologist and eollector . . . . Vol. 12 No. . . . . •... . . . . . . . . . . . . . . . 304 B,rth of the Opal lpc,em l by Be tty Browne, R. T . . . . . . . ....traveling in seven motor cars to Oreana, Pershing County, Nevada, to visit and inspect the Tungsten and...are rich in gold and silver, Dad Lee has also made an effort to reproduce in realistic fashion some of...ever used in Nevada, the firs t pair of crap dice, an old saddle owned by a former notorious outlaw of |  | | 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..................... |  | | Book | | many Silunan materials. Several and steel in Ordovic,an s,o engmeenng. Carnbnan 570 aspects of these sciences...occurrence and the qualities to note when making an identification. Many of lhc technical lt'rms used...""""'"''• ""' «,,=,.;,;,-..,~ .. ;,, cei,tsurn,r,an,es tho """'~ ~""'"' ~ - - ol ~,· _.., ,,.,•...Asterisl<5 - - - - - + - - - denoie the most ll!ll)O<\an! d,S1m9u,sh,,,g fec:ures of rn,oe,a~ bamples ""'...major chemical componen ts? The Earth consists of an extremely di:nse core, a fairly dense mantle and |  | | Book | | or the irregular bounding surface of an embedded grain or of an aggregate, or any mineral change that... as evidenced by the undistorted preservation of an original texture or structure, whether this be the...George Amadeus Carl Friedrich Naumann (1797e1873), an important pioneer European mineralogist and crystallographer...wholly different composition may grow in the body of an old mineral or mineral aggregate. Bates, R.L., Jackson...Frondel of Harvard University in 1935. It was based on an extensive study of pseudomorphs in the collections |  | | 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 | | and sapphire Emerald Feldspars Mineraloids Amber Opal Decorative stones 154 156 158 160 162 164 166 168...of rock. 14 '1------4 Formation ) Pegmatite is an extreme igneous rock that forms during the final...pressures underground. Devil's Tower, Wyoming, USA. A rock that cooled within a volcanic vent and that...e--_ Quartz The Grand Canyon, Arizona, USA. The Colorado River has cut a 1.6-km-(1-mile-) deep canyon...Coarse-grained dark rock Yellow-green rock is an important source ofchromium ore 16 Deep inside |  | | Journal (issue) | | scintillating colors of Australian opal come to us through the courtesy of the Opal Spectrum company. For details...Our Cover feature. And, for a fascinating look at opal mining , plus more pictures, turn to page 8. AND...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) | | received a shipment of High Grade Welo opal from Ethiopia-posting new opal parcels daily. Please call or order...with ALBITE and QUARTZ Himalaya Mine, San Diego County, CA Watercolor by Frederick C. Wilda© REVELATIONS...MAY 2020 7 Covington Has Moved! ROYAL PEACOCK OPAL MINE Dig your own Virgin Valley Fire Opals ALL YOU...You may ask why write about a lovely blue gem in an article on non-zeolite minerals? It so happens larimar...needle-thin, very brittle, sharp, acicular crystals have an affinity to break off when they penetrate the skin |  | | Journal (issue) | | Lebanon, N{ Ray Page Santa Monica, CA George Rossn~an Pasadena, CA Kenneth Scarratt London, United Kingdom...either by control of the new source or by access to an important market segment, can assign a name of their...in the 1970s. We at Gems o)Gemology have supported an author's right to use a term that has a reasonable...misleading. Attempting to establish the makeup of an all-powerful nomenclature board to serve the gemological...public accepts this concept, I would classify such an appellation as merely "jargon of the trade." Now |  | | Journal (issue) | | several things : 1) Tweak the curiosity which is an essential part of the makeup of every hobby craftworker...of product, as in dental inlays and crowns. It i'> an old process. Those who viewed the recent Tutankhamen...(12-18): $2.50 Under 12 free when accompanied by an adult SHOW HOURS August 7th 10 a.m. to 9:30 p.m...the other works. These artists work directly with an acetylene torch. None of the pieces shown were cast;...is all copper. The green color on these pieces is an acid patina which Richard developed. The base for |  | | 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 |
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