 | | Journal (article/letter/editorial) | | of sapphires from a lamprophyre dike at Yogo Gulch, Montana, USA: Clues from their melt inclusions Aaron...of sapphires from a lamprophyre dike at Yogo Gulch, Montana, USA: Clues from their melt inclusions, LITHOS...Origin of sapphires from a lamprophyre dike at Yogo Gulch, 1 RI Aaron C. Palke1*, Nathan D. Renfro1... SC *aaron.palke@gia.edu Montana Bureau of Mines and Geology, Montana Tech, 1300 West Park Street...Street, Butte, MT NU 2 PT Montana, USA: Clues from their melt inclusions 59701 MA ABSTRACT Gem corundum |  | | Book | | #" Stephen M. Voynick 1 Yogo The Great American Sapphire Yogo The Great American Sapphire by...Cataloging-in-Publication Data Voynick, Stephen M. Yogo : the great American sapphire. Rev. ed. of; The...1. Sapphire mines and miningāMontanaā^Yogo Creek Regionā History. 2. Yogo Creek Region (Mont.)āHistory...Publishing Co. Contents Preface.vii Introduction: The Yogo Dike.ix Chapter 1: The Blue Pebbles.1 Chapter 2:...Gold That Glitters.117 Chapter 5: The Return of the Yogo.151 Chapter 6: Rocking the Boat.165 Chapter 7: The |  | | Report (volume) | | Corundum Deposits of Montana By STEPHEN E. CLABAUGH ^ GEOLOGICAL SURVEY BULLETIN 983 * .^ A description...and associated placer deposits___.______. ______ Yogo sapphire deposit. _________________________________________...occurrences. _-_--_--__--____--____-_-____-__-___ Quartz Gulch _____________________________________________ Pole..._______-_--_______________-_-___-_____-Chouteau County, _________________ _____________-________ Origin...____.__ Origin of the deposits in southwestern Montana.__-.-_---_-_... Hypothesis of igneous origin. ___ |  | | Journal (issue) | | area, San Americaās Royal Gems ā Montana and Yogo Sapphires Benito County, California; the group of sapGems...Mountain Mine, GranTantalizing Turquoise ite Country, Montana. Photos of gemstones Oregon Sunstone ā A Rare and...Daniel Bronfen, Brazil Evan Caplan, USA Rocco Gay, Italy Sushil Goyal, USA Shahina Hatta, Hong Kong Dwarka...Thailand Immediate Past President Benjamin Hackman, USA Chief Executive Officer Gary Roskin ICA General Manager...31 W. 47th Street, Suite 1103 New York, NY 10036 USA ica@gemstone.org T: 1.212.620.0900 F: 1.212.352.9054 |  | | Book | | Montana Hodges Robert Feldman Shaded relief indicates terrain and slope. Second Edition Rockhounding...longitude numbers and grid ticks are GPS compatible. Montana Enhanced detail shows more symbols, labels, and...history Cover photos of Montana agate (front) and ammonite imprint (back) Ā© Montana Hodges Cover design by...imprint of The Globe Pequot Press MONTANA Search for stunning Montana agate along the Yellowstone River...paleontologists excavate dinosaurs in Malta. Rockhounding Montana points the way to the best rockhounding in the |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University... the Rocky Mountains, and furthest to the northwest, the belt basin. The Rocky Mountains contain sedimentary |  | | Journal (issue) | | Heinz-Jiirgen Bernhardt, a n d Fred M o u a w a d The Yogo Sapphire Deposit Keith A. ~ ~ c h a l u k NOTES...occurrence of sapphircs and zircons of the Jemaa district, in central Nigeria. We coinpared the Jenlaa alkali...described by Hlaing (1993), with staurolite and pyrite mentioned as accessory minerals. T h e overgrowth...ruby froin Sri Lanlta and a blue sapphire from Montana (Beran, 1991), and in untreated blue Australian...in tlie spectra of flux-grown synthetic rubies (Belt, 1967; Volynets et al., 1972; Peretti and Smith |  | | Journal (article/letter/editorial) | | corundum in this area and in the great eorundiferous belt stretching along the line of the Appalachian crystalline...natural crystals of the rubies from the Cowee district of North Carolina, and that in our opinion their...be in no way inferior to those from the Mogok district of Burma. i i p. ..J F'RA,N KL| N 9 ! . ~ ...~ '} t ,~ Miler FxG. 1.--Sketch Map of the district in which Ruby and Rhodolite are found. x 15th...association of minerals as occurs in Burma. The district in which these interesting discoveries ~ave been |  | | Report (volume) | | ............................................. Montana ....-.-.--.......................................___..__._....._..._______..__._.____..._.____.' Montana .............................................................................................. Montana ...............................................................-....--......... ..----........ Montana .........'... ................................... II. Outcrop of peridotite at Buck Creek, Clay County, N. C........ III. A, Corundum in chlorite at Corundum |  | | Report (volume) | | sapphires^......... ..........._............. ...... Montana sapphires ........ ..............................sapphires ...... _........................... Yogo Gulch sapphires ............................. ............................. ................. Macon County .........._. ...........,..-...........-.............. .......... .1...................... Clay County.. ...............................................tracts...................... ......... Jackson County ................ ............................. |  | | Journal (issue) | | Black Diamonds from Zimbabwe Characterization of Yogo Sapphires Synthetic Diamonds Chart 2018 GIA SYMPOSIUM...pg. 113 111 Summer Reading: Diamond Research, Yogo Sapphire, and Byzantine Garnet Duncan Pay FEATURE...Gemological Characterization of Sapphires from Yogo Gulch, Montana Nathan D. Renfro, Aaron C. Palke, and Richard...E. Kane James E. Shigley London, UK Helena, Montana Carlsbad, California John L. Emmett Stefanos...the Cover For more than 120 years, Yogo Gulch in central Montana has been one of the worldās most illustrious |  | | Journal (article/letter/editorial) | | Nelsonite from the Western Adirondack Mountains of New York State, USA Robert S. Darling 1, *, Jessica L...Cortland, NY 13045, USA Hommocks Middle School, 130 Hommocks Road, Larchmont, NY 10538, USA; jgordon@mamkschools...Tower, Cornell University, Ithaca, NY 14853-6401, USA; erl1@cornell.edu Correspondence: robert.darling@cortland...fine-grained, phaneritic, magnetite + apatite + ilmenite + pyrite + monazite + zircon igneous rock with lesser quantities...garnet Ā± secondary chlorite [8]. It has a weak, pyrite-defined foliation [15]. The orebody is oriented |  | | Report (volume) | | Del Norte County; Trinity River, Trinity County; Spanish Creek and Gopher Hill, Plumas County; Placerville...Dorado County; Cherokee Flats, Yankee Hill,and Oroville, Butte County; French Corral, Nevada County; Indian...Indian Gulch and Volcano, Amador County; and Alpine Creek, Tulare County. Other western localities are:...Diamond Basin, Ada County, Idaho; Curry County, Oreg.; and Nelson Hill, near Glacier County, Mont. The...Pierce County; Oregon, Dane County; Kohlsville, Washington County; Saukville, Ozaukee County; Eagle, |  | | Book | | identiļ¬ed pyrrhotite, sphalerite and one pyrrhotite-pyrite composite among Mogok inclusions, while complex...identiļ¬cations. An earlier suggested predominance of pyrite for Mogok sulļ¬de inclusions had misidentiļ¬ed the...associated with the Montana Bureau of Mines, mineral dealers and miners from MT, USA, sapphire ļ¬elds. The...limited sources in Montana, USA. Transitional pink sapphires from Sri Lanka and Montana were also present...Thailand/Cambodia, Sri Lanka, Mogok, Myanmar and Montana ļ¬elds. The gemstones were largely recoveries from |  | | Book | | RWH PUBLISHING ~ }OB 28:18 BOULDER, CO LORADO USA 1997 ~ Ā© 1997 by Richard W. Hughes All rights...Publishing 4946 Clubhouse Circle Boulder, CO 80301-3725, USA Tel: 303-530-7975; Fax: 303-530-7975 Publisher's...States of America (USA) 454 382 Idaho 454 Bibliography-Idaho 454 Montana 454 Yogo G ulch 454 Other Moncana...localities 460 Characteristics of Montana coru.ndwns 465 Bibliography-Montana 469 North Caroli na 472 Bibl...473 History 474 Luc Yen 474 Quy Chau (Bu Khang District) 475 Other Vietnam corundu.n1 localities 478 Mining |  | | Journal (issue) | | the subscribers as well who may desire to learn a little about fossils. 19 In the March issue another...By A. J . Harstad The existence of sapphires in Montana has been kno,vn since the early '80.s and probably...localities in this State are, Yogo Gulch in F ergus County, where the famous Yogo or Cornflower blue gems a1Ā·e...obtained, Rock Creek, West of Anaconda, and a district beginning about 20 miles East of Helena on the...rather low here but the opposite is true of the Yogo deposits. In these districts many sapphires are |  | | Journal (article/letter/editorial) | | Fig. 11 2. W. Nicol, Magnetkies von Frontenac County, Canada. Hierzu Taf. II, Fig. 12ā14 . . 3. L. Brugnatelli...31. A. Lacroix, Ć¼ber die Zersetzungsproducte der Pyrite des Pariser Beckens, von Naxos und von Susaki bei...neuen Meteoriten von den Sacramentogebirgen, Eddy County, Neu-Mexico 31. Ī¤. Ī. Jaggar jr., ein einfaches...Ć¼ber die Sapphire von Montana, besonders diejenigen aus Ā»Yogo GulchĀ« in Fergus County . 297 L. V. Pirsson...Gesteine aus Yogo Gulch, Montana 297 J. H. Pratt, Ć¼ber die Krystallographie der Sapphire von Montana. 298 J |  | | Book | | India, Australia, Kenya, Tanzania, Montana and North Carolina (USA), Nigeria, Afghanistan, Pakistan, Laos...Bariand, Urs Zwyssig, Donna Dirlam, John Koivula, Judith Kinmond, and Rita Pascolini. A special thanks is...India 92 Sapphire - Australia 94 Sapphire - Montana, USA 96 Ruby - Kenya 97 Sapphire - Umba Valley, Tanzania...Bibliography 300 Montana, USA 300 Yogo Guieb 301 Mineralogy of the Yogo sapphire 304 Other Montana corundum localities...309 Chapter 1 History of corundum In the mountains of Serendib (Ceylon) precious stones are found |  | | Journal (article/letter/editorial) | | specimen from the railway cutting south-east of Little Arnage is of considerable interest as throwin g...biotite, iron-ores, green spinelle, and probably a little felspar, was analysed. It contained, as might naturally...andalusite, alkali-felspar, oligoclase, biotite, pyrite, and a green spinelle. Quartz is som etimes, but...corundum was found in the residue together with pyrite, spinelle, and a few crystals of rut ile that had...the Burma rubies and is a marked feature of the Montana" sapphires." A very interesting case of the occurrence |  | | Book | | ROADSIDE % JEOLOGY of Montana David Alt and Donald W. Hyndman ROADSIDE N JEOLoGY of Montana David Alt Donald...Roadside geology of Montana. Bibliography: p. Includes index. 1. Geology ā Montana ā Guide-books. I. Hyndman...know something about the rocks and landscapes of Montana. We hope our professional colleagues will enjoy...dealing with the four major geologic provinces in Montana. Each starts with its own more specific narrative...Nearly every geologist who has ever worked in Montana contributed something to this book. We read almost |  | | Book (volume) | | brownish yellow octagonal calcite (21.30 ct), Montana; light yellow orthoclase feldspar (25.03 ct), Idaho;...Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal step cut violetish pink...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...oligoclase feldspar (5.04 ct), Oregon; and three Montana sapphires, violetish blue (2.52 ct), yellow (4...large-scale mining of sapphire-bearing gravels in Montana is beginning and is expected to produce large quantities |  | | Book (edition) | | from the Tourmaline Q ueen .1ine, Pala, San Diego County, California. From a pen-and-ink drawing by W. E...Leonard Enos, J. A. Ferguson, George M. Francis, Judith W. Frondel, Charles W. Fryer, R. Gordon Gastil...Syenite, Serpentine, Rodingite, Copper in Basalt, Pyrite, Calcite, ā¢Dolomite, Mariposite, Howlite, Ulexite...Corundum Hill, North Carolina 7. Eldorado Bar, Montana 8. W. D. Baltzley 9. Ellis mine pocket, Hiddenite...California 19. Sequist Ranch topaz area, Texas 20. Little Three mine, Ramona, California 21. Gem-bearing |  | | Book | | MILLION men and women in the United States pursue the little known trails and lanes of the country in a continuing...light-colored igneous rocks and magnetite, ilmenite, pyrite and pyrrhotite are associated with dark igneous...position of igneous rocks. Anyone who walks in the mountains will be familiar with the natural processes going...formation of coal is interĀ¬ esting. It has very little mineral substance but has been formed by pressure...feet. A good example of a dike is the Yogo Gulch in central Montana. This dike extends for several miles |  | | Journal (issue) | | reportedly from the Kuh-iLal deposit in the Pamir Mountains of Tajikistan. p. 330 REGULAR FEATURES 337 354...Mouawad Campus 5345 Armada Drive Carlsbad, CA 92008 USA Ā© 2022 Gemological Institute of America All rights...spinel reportedly from Kuh-i-Lal in the Pamir Mountains of Tajikistan. To determine the cause of color...study of ruby (corundum) compositions from the Mogok Belt, Myanmar: Searching for chemical fingerprints. American...Chinese sapphire material was therefore considered of little economic value on the global gem market. The situation |  | Graham, Ian T., Harris, Stephen J., Martin, Laure, Lay, Angela, Zappettini, Eduardo (2019) Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights into Their Origin from in situ Oxygen Isotopes. Minerals, 9 (7) 390 doi:10.3390/min9070390 | Journal (article/letter/editorial) | | study, we investigated the primary origin of the little-known alluvial colorless-white to blue sapphires...apatite, rutile, magnetite, phlogopite, trikalsilite, pyrite, baryte, monazite- (La), xenotime-(Y), zircon 0...Rinconada, Jujuy Province, within the San Juan de Oro Basin of northwest Argentina (Figure 1; [14,15]). The...suggested by Palke et al. [21,34] for sapphires from Montana, USA. The large within-grain variation seen in trace...depleted Paleoproterozoic rocks of the Belomorian Belt, Karelia, Russia, attributed to global glaciation |
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