 | | Journal (article/letter/editorial) | | America, 5355 Armada Drive, Carlsbad, CA 92008, USA; apalke@gia.edu Received: 3 March...deposits are typically divided into blue sapphire and ruby deposits. However, this classification often overlooks...chromium to create the rich, red color expected of a ruby. This contribution deals specifically with economically...with rare rubies (secondary Montana sapphire deposits and Yogo Gulch in Montana as well as the gem fields...element profiles and inclusions in the blue sapphire/ruby assemblages in these deposits shows that there are |  | | Journal (article/letter/editorial) | | for Special Issue “Mineralogy and Geochemistry of Ruby” Frederick L. Sutherland 1, * 1 2 * and Khin Zaw...October 2020 1. Introduction Ruby as a natural gemstone has an early history in which...study [4] and for exploration quests to find new ruby deposits [5,6]. This Special Issue brings together...diversity of scientific teams that have studied ruby and its allied mineral associates from a wide range...papers cover a significant component of previous ruby literature within their pages, and with use of cutting-edge |  | | Journal (article/letter/editorial) | | New 207Pb– 206Pb and 40Ar– 39Ar ages from SW Montana, USA: constraints on the Proterozoic and Archæan...Department of Geology, Kent State Uni6ersity, Kent, OH, USA c Department of Earth Sciences, The Open Uni6ersity...of the northern Wyoming province, southwestern Montana. This suite consists of highly metamorphosed carbonates...and the 1820 Ma age of the oldest garnets in the Ruby Range. An older cryptic thermotectonic event is...oldest rocks in the US crop out in southwestern Montana. Here a Precambrian crystalline complex forming |  | | Journal (issue) | | Dallas Gem Mine area, San America’s Royal Gems – Montana and Yogo Sapphires Benito County, California; the...Mountain Mine, GranTantalizing Turquoise ite Country, Montana. Photos of gemstones Oregon Sunstone – A Rare and...Gemstone and Jewelry Industry 56 Two Decades of GIT's Ruby and Sapphire Color Standards Color Varieties of...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 |  | | Report (issue) | | THE GEOLOGY AND PETROLEUM POTENTIAL OF SOUTHWEST MONTANA BY W. J. PERRY, JR. OPEN-FILE REPORT 88-450R ...THE GEOLOGY AND PETROLEUM POTENTIAL OF SOUTHWEST MONTANA BY W. J. PERRY, JR. CONTENTS PAGE INTRODUCTION...BASEMENT STRUCTURE PLAY -----------------------5 Ruby basin subplay ------------------------5 Geologic...RESOURCE POTENTIAL OF SOUTHWEST MONTANA INTRODUCTION The Southwest Montana province, with an area of approximately...Counties, Montana, to the edge of the Cordilleran thrust belt in Beaverhead County, Montana (Fig. 1). |  | | Journal (issue) | | Trends Van Cleef & Arpels at Singapore Museum Montana Sapphire Deposits Under The Spotlight Exceptional...Trends Van Cleef & Arpels at Singapore Museum Montana Sapphire Deposits Under The Spotlight Cover images:Tourmaline:...images:Tourmaline: courtesy of Ian Kalway. Sapphire and ruby: courtesy of Jeffrey Scovil, ©Primagem. CONTENTS...Collection Goes on Display in Arizona Investigating The Montana Sapphire Deposits Perettiite Classified By IMA...Gemstones Sparkle at Bonhams London Auction ‘Jubilee Ruby’ Is Highlight Of Christie’s Sale, Selling For $14 |  | Palke, Aaron C., Wong, Jacqueline, Verdel, Charles, Ávila, Janaína N. (2018) A common origin for Thai/Cambodian rubies and blue and violet sapphires from Yogo Gulch, Montana, U.S.A.?. American Mineralogist, 103 (3) 469-479 doi:10.2138/am-2018-6164 | Journal (article/letter/editorial) | | and blue and violet sapphires from Yogo Gulch, Montana, U.S.A.? Aaron C. Palke1,2,3,*, Jacqueline Wong3...have been proposed for volcanically transported ruby and sapphire deposits around the world. In this...blue to reddish-violet sapphires from Yogo Gulch, Montana, U.S.A., with rubies from the Chantaburi-Trat region...ought to be used with caution. Keywords: Sapphire, ruby, Yogo Gulch, melt inclusions, corundum, gemology...2017). They mostly produce sapphires with minor ruby. However, the southeastern Asian nations of Thailand |  | | Book | | Mineralogy and Geochemistry of Ruby Edited by Frederick Lin Sutherland and Khin Zaw Printed Edition... Mineralogy and Geochemistry of Ruby Mineralogy and Geochemistry of Ruby Editors Frederick Lin Sutherland...the Special Issue “Mineralogy and Geochemistry of Ruby” published online in the open access journal Minerals... vii Preface to ”Mineralogy and Geochemistry of Ruby” . . . . . . . . . . . . . . . . . . . . . . . ...for Special Issue “Mineralogy and Geochemistry of Ruby” Reprinted from: Minerals 2020, 10, 888, doi:10 |  | | Journal (article/letter/editorial) | | anomalies over concealed talc bodies, southwestern Montana A.M. Blount a and Gary A. Parkison b aThe Newark...NJ07102, USA bWestmont Mining Inc., 4949 S. Syracuse St., Suite 4200, Denver, CO 80237, USA (Accepted...anomalies over concealed talc bodies, southwestern Montana. In: W. Petruk, A.H. Vassiliou and D.M. Hausen...with buried and blind talc bodies in southwestern Montana. In order to better understand the intensity and...weathering and because the analytical procedures for Montana soils involve nonfractionated bulk samples, a large |  | | Report (chapter) | | Geology, Indiana University, Bloomington, I N 47405, USA Abstract: A survey of detrital opaque Fe-Ti oxide...Rocky Mountains, USA (semi-arid climate, high relief) and the Appalachian Mountains, USA (humid climate...within a dissected magmatic arc in southwestern Montana, USA. A separate discriminant function is calculated...provenance of the Tertiary Renova sandstones of Montana, USA on the basis of their D O P Q characteristics...Virginia, and the Rocky Mountains of southwestern Montana, USA (b) the Holocene sands derived from these rocks |  | | Journal (article/letter/editorial) | | Institute of Technology, Pasadena, CA 91125-2500 USA Abstract: Hydroxide bands arising from intrinsic...cm-1) of the IR spectrum of hydrothermally grown ruby and attributed two sharp bands at 3230 and 3180...cm-1 in the spectra of a ruby from Sri Lanka and a blue sapphire from Montana. Because the samples used...(1995) of comparable sharp OH bands in heat treated ruby, but not in untreated natural samples. Further confirmation...Gulch, Judith Basin Co., Montana LA 18947 Yogo Gulch, Judith Basin Co., Montana Yogo Sapphire Mine, Judith |  | | Journal (issue) | | Imponant Mineral Colleclions by Museums, 21-8:7. Ruby and Fluorescence. 21-8:9. Santamaria, Jose: New...21-11:7. Minerals Acan1hi1e:Morocco, 21-9:1 P Albite: USA, New Hampshire, Carroll Madison. 21-3:4 Aluminocopiapi1e:...Juan La Alcaparrosa, Santa Elena. 21-9:7 Anatase: USA. Colorado, Cripple Creek,21-5:12 P An1arc1ici1e:Amarctica...21-3:10 Antarcticile: USA, California. San Bemadino Brislol Dry lake, 21-3:10 Apatile: USA, New Hampshire,...Arscnodcscloizi1c: USA, Montana, Granite, Philipsburg. Scratch Awl. 21-7:1 Aurichalcile: USA, Idaho, Lemhi |  | | Journal (article/letter/editorial) | | causes the red color characteristic of the variety ruby. Sapphire, as a key pillar in a wide economic network...gem corundum, particularly in its application to ruby studies. Chemical characterization of sapphires...addition, comprehensive studies of sapphires from Montana were initially suggestive of metamorphic and metasomatic...Association of Canada, Québec. Hughes, R.W. (2017) Ruby & Sapphire: A Gemologist’s Guide, 773 p. RWH Publishing/Lotus...(2015) Provenance determination of sapphire and ruby using laser-induced breakdown spectroscopy and multivariant |  | Van Gosen, Bradley S., Hammarstrom, Jane M., Kellogg, Karl S., Berg, Richard B. (1998) Map showing areas with potential for garnet resources in bedrock and placer in the Blacktail Mountains and the Gravelly, Greenhorn, Ruby, and Snowcrest ranges of southwestern Montana. Open-File Report Vol. 1998 (98-224) US Geological Survey doi:10.3133/ofr98224a | Report (issue) | | of Beaverhead County, Montana, and the western part of Madison County, Montana. The study area (see Index...Pass south to the Montana-Idaho border; and (4) The southern boundary is the Montana-Idaho border (the...Henrys Lake Mountains and the Gravelly, Greenhorn, Ruby and Snowcrest Ranges, as well as the intervening...placer resources Qa Aqf Qf Qf Qa STUDY AREA Ruby Garnet mine Qf Aqf Aqf Asg QTb Aqf Qa Aam...45o The garnet mined from dredge tailings at the Ruby Garnet operation near Alder, as well as those mined |  | | Journal (issue) | | Pearls, A Natural History. Harry N. Abrams, New York, USA, 23-61 Lee, D. W., 1997. Iridescent blue plants....fifteen causes of color. John Wiley & Sons, New York, USA, 247-77 Parker, A. R., 2000. 515 million years of...1997. College Physics, Prentice Hall, New Jersey, USA, 747-50 400 WORKSHOPS The autumn calendar of one-day...untreated or heat-treated samples from Sri Lanka and Montana, U.S.A., and their distinction from berylliumdiffusion-treated...berylliumdiffusion-treated samples from Sri Lanka, Montana, U.S.A., Ilakaka, Madagascar, and Songea, Tanzania. |  | | Journal (article/letter/editorial) | | Department of Geology, Kent State UniÕersity, Kent, OH, USA Received 8 June 1999; accepted 17 March 2000 Abstract...Precambrian metamorphic terrain of southwestern Montana were selected for argon isotopic analysis. Sample...40Ar– 39Ar geochronology; Alteration; Biotite; SW Montana; Precambrian 1. Introduction 2. Sample selection...high-grade gneisses from the Ruby Range, a Precambrian terrain in southwestern Montana, USA. The tectonometamorphic...is not repeated here. Previous geochronology of Ruby Range phlogopites, biotites, and hornblendes has |  | | Report (volume) | | stratigraphy of the northern part of the Ruby Range, southwestern Montana GEOLOGICAL SURVEY BULLETIN 1405-1...stratigraphy of the northern part of the Ruby Range, southwestern Montana By RUSSELL G. TYSDAL CONTRIBUTIONS...stratigraphy of the northern part of the Ruby Range, southwestern Montana. (Contributions to stratigraphy) (Geological...Geology, Stratigraphic-Mesozoic. 3. GeologyMontana-Ruby Mountains. I. Title. II. Series. III. Series: United...ILLUSTRATIONS Page FIGURE 1. Sketch map of southwestern Montana showing area of report and paleotectonic features |  | Duke, Edward F., Galbreath, Kevin C., Trusty, Kane J. (1990) Fluid inclusion and carbon isotope studies of quartz-graphite veins, Black Hills, South Dakota, and Ruby Range, Montana. Geochimica et Cosmochimica Acta, 54 (3) 683-698 doi:10.1016/0016-7037(90)90364-q | Journal (article/letter/editorial) | | quartz-graphite veins, Black Hills, South Dakota, and Ruby Range, Montana* Institute EDWARDF. DUKE, KEVIN C. GALBREATH...School of Mines and Technology, Rapid City, SD 57701, USA (ReceivedApril I, 1989; accepted in revisedformSeptember...Crystal Graphite Mine in the southwestern Ruby Range, Montana. Measured fluid inclusion compositions and...derived largely from reduced organic carbon. In the Ruby Range, peak metamorphic conditions were higher---750”-850°C...Mine and su~oundi~ area in the southwestern Ruby Range, Montana. Ours are the first data on fluid inclusions | | | Report (issue) | | Location Status; Extent of development Comments Ruby Range 14 18 15' 12 17 16 23 References 5...36);0300570447 Geologic Setting of the Southwest Montana Talc Deposits 12 Bennett Owen claim NW¼ sec...economically important talc deposits of southwest Montana are found as replacements of dolomitic marble of...origin and timing of talc formation in southwest Montana are discussed by Anderson (1987); Anderson and...Dolomitic marbles in the Gravelly, Greenhorn, and Ruby Ranges occur within an Archean-age sequence of marble |  | | Journal (article/letter/editorial) | | processes are common practice in the heat treatment of ruby and sapphire at high temperatures (1800–1100 °C;...inclusions found in three alluvial corundum grains from Montana and Australia as being primary. The melt inclusions...provided for the melt inclusions from the two Montana alluvial sources, with the result that inclusions...(1993) Heat treating the sapphires of Rock Creek, Montana. Gems & Gemology, 29/4, 250–272. Guo, J., O’Reilly...Minerals, 18, 251–258. Nassau, K. (1981) Heat treating ruby and sapphire: technical aspects. Gems & Gemology |  | | 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...be productive sources of mineral specimens. The Montana Gold Rush After giving up on the California gold...largest gold nugget found in Montana; it is displayed at (and owned by) the Montana Bureau of Mines and Geology |  | | Report (issue) | | Bedded Iron Deposits of the Southwestern Ruby Range, Montana , , 'A " U,S. GEOLOGICAL SURVEY PROFESSIONAL...Bedded Iron Deposits of the Southwestern Ruby Range, Montana By HAROLD L. JAMES With a section on THE...THE KELLY IRON DEPOSIT OF THE NORTHEASTERN RUBY RANGE U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1495...and mineral deposits of the southwestern Ruby Range, Montana UNITED STATES GOVERNMENT PRINTING OFFICE...bedded iron deposits of the southwestern Ruby Range, Montana. (U.S. Geological Survey professional paper | | | Report (issue) | | 45' 30' 45' 111o15' o 45 30' 6 3 5 2 Southern Ruby Range (map area B) In response to requests from...Beaverhead and Madison Counties, southwestern Montana. These agencies use mineral resource data in creating...of Beaverhead County, Montana, and the western part of Madison County, Montana. The study area (see Index...Pass south to the Montana-Idaho border; and (4) The southern boundary is the Montana-Idaho border (the...Henrys Lake Mountains and the Gravelly, Greenhorn, Ruby and Snowcrest Ranges, as well as the intervening |  | | Report (issue) | | Mineral Resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana U.S. GEOLOGICAL SURVEY...Mineral Resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana By R. G. TYSDAL, G....of Mines With a section on Talc By R. B. BERG Montana Bureau of Mines and Geology U.S. GEOLOGICAL SURVEY...RESOURCES OF WILDERNESS STUDY AREASSOUTHWESTERN MONTANA DEPARTMENT OF THE INTERIOR DONALD PAUL MODEL...Mineral resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana (U.S. Geological Survey |  | | Journal (issue) | | GEMOLOGICAL INSTITUTE OF AMERICA Characterization of Montana Sapphire Morphology of Colombian Emerald 2023 Tucson...ARTICLES 2 p. 20 Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek...three secondary sapphire deposits in the state of Montana, as well as the properties of these sapphires (unheated...cultured pearl • Gastropod shell in a shell blister • Ruby with synthetic overgrowth • Exceptionally large...crystals in sapphire • Solid inclusions in flame-fusion ruby • Quarterly Crystal: Columbite(?) in beryl p. 89 |
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