 | | Book (edition) | | and often gems can be found. valuable For the mountain ranges and level for the ist to States contain...gem stones mon dull are as hard or harder than quartz, a com- mineral everywhere present as dust which...Hardness Scale 6. Orthoclase 1. Talc 2. Gypsum 7. Quartz Topaz Corundum 10. Diamond 3. Colcite 8. 4...Your will scratch orthoclase feldspar but not quartz. In making hardness appears to be a scratch paper...the general arrange- ment of these surfaces. Quartz and amethyst, for example, are frequently crystallized |  | | Book | | .3 COLORADO. of COLORADO. J. S. l GEORGETOWN, COLO. GEORGETOWN COURIER PRINT. 1887. 3 Bancroft...From a mineralogical point of view the wealth of Colorado exceeds that of In the metallic minerals almost...to in the following pages Proceedings of the Colorado Scientific Society. Proceedings of the Academy...the U. S. Geological Survey. J. GEORGETOWN, COLORADO, January, 1887. S. RANDALL. : MINERALS...gravel of streams and in veins. The veins of Gilpin County are especially noteworthy for the amount of gold |  | | Report (volume) | | the ruby, sapphire, spinel, emerald, rutile, and quartz of gem quality have been synthesized. The best...Fluorite Apatite . 6. 7. 8. 9. 10. Orthoclase Quartz Topaz Corundum Diamond The numbers preceding each...of silica (quartz, 7 on Moh's scale) particles, a gem stone should be harder than quartz. Some minerals...react to heat are: violet quartz (amethyst) changing to orange brown, smoky quartz to yellow, pale-green...sapphire, star sapphire, star ruby, rutile, and quartz are gem stones that have been successfully synthesized |  | | Journal (issue) | | and D.D. Hogarth Diamond collecting in northern Colorado ............................................205...Collins The Lake Clear-Kuehl Lake area, Renfrew County, Ontario....................................................209 by J. D. Grice and R. A. Gault Quartz crystals from the Granite Creek-Lolo Pass area...Endlichite and descloizite from the Chalk Mountain mine, Churchill County, Nevada .......................... Bostwick Mercury amidonitrate crystals from Colorado ....................................233 Printed |  | | Report (issue) | | CIRCULAR 215 URANIUM IN THE METAUMINING DISTRICTS OF COLORADO UNITED STATES DEPARTMENT OF THE INTERIOR Douglas...215 URANIUM IN THE METAL-MINING DISTRICTS OF COLORADO By R. U. King, B. F. Leonard, F. B. Moore, and...C. URANIUM IN THE METAL-MINING DISTRICTS OF COLORADO By R. U. King, B. F. Leonard, F. B. Moore, and...showing the distribution of uranium deposits in Colorado. Relation of pitchblende deposits to bostonite...bostonite dikes in the Front Range mineral belt, Colorado .......................... Relation of pitchblende |  | | Book | | Catalog Card Number: 74-1276 The pictures of gold-in-quartz, smithsonite, stilbite, and wulfenite on the front...learn that gravel beds are rich in such minerals as quartz, feldspar, mica, garnet, tourmaline, magnetite...Schists often contain feldspar, garnet, mica and quartz. With sapphires are often found associated an abundance...oxide. Chalcedony, one of the common varieties of quartz, was formed in the same way. Pegmatites and Hematites...contains as its principal com¬ ponents feldspar, quartz and mica it is known as pegmatite. Most of our |  | | Report (volume) | | Cross, with a Geological Sketch of Buffalo Peaks, Colorado, by S. F. Emmons. 1883. 8°. 42pp. 2 pi. Price...meridian of 76° 30', from Tompkins County, New York, to Bradford County, Pennsylvania, by Henry S.Williams...cents. 16. On the higher Devonian Faunas of Ontario County, New York, by J. M. Clarke. 1885. 8°. 86 pp. 3...I. Minerals from the basalt of Table Mountain,' Golden, Colorado, by Whitman Cross and W. F. Hillebrand.........J................. Description of Table Mountain .......................................... Manner |  | | Journal (article/letter/editorial) | | at 23:49 05 October 2014 Daybreak Mine, Spokane County, Washington T he naming of minerals that contain...autunite aggregates from the Daybreak mine, Spokane County, Washington; John Lucking specimen, Jeff Scovil...autunite crystals on matrix from the Apex mine, Lander County, Nevada; Scott Kleine specimen, Jeff Scovil photo... felsic plutons including those of granite and quartz-monzonite composition, and roll-front and other...Hill prospect at Lovell and several other Oxford County sites, including the well190 ROCKS & MINERALS |  | | Report (volume) | | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT |  | | Journal (article/letter/editorial) | | Hampshire; and at the Bedford quarries, Westchester County, New York. “Torbernite” has been reported from...both the Lawson and Chalk Mountain mines in the Spruce Pine district, Mitchell County, North Carolina. Here...surfaces in granitic rock and in small vugs in smoky quartz. Torbemite and metatorbernite are widespread...the roll-front, sandstone-hosted deposits of the Colorado Plateau and elsewhere. Metatorbernite from this...Yavapai County, Arizona, and in similarly sized crystals at the Majuba Hill mine, Pershing County, Nevada |  | | Report (issue) | | contemporaneous but better known San Juan volcanic field of Colorado, extrusions of lava flows are very minor in the...INDIAN PEAK ° CALDERA COMPLEX..MARYSVALE 1SANJUAN COLORADO , | RHYOLITE-DACITE I__I ASH-FLOW TUFFS ANDESITIC...in the Great Basin and in areas surrounding the Colorado Plateaus (dotted line). Intermediate composition...order of decreasing abundance, of plagioclase, quartz, biotite, hornblende, Fe-Ti oxides, sanidine, and...plagioclase and lesser biotite, hornblende, and quartz; the Wah Wah Springs is unique in having more hornblende |  | | Journal (article/letter/editorial) | | granodiorite type (Mutschler, 1981); Climax-type vs. quartz monzonite type (White et al., 1981); F-rich vs...alkalic monzonitic Mo-(Au), alkalic syenitic Mo, 2 quartz-monzonitic to granitic Mo-Cu, (biotite-)granitic...with depth. This was first recognized at Climax, Colorado (Fig. 2), where dikes emanating from the top of...Henderson, Colorado), breccia pipes (e.g., Cave Peak, Texas; Questa, New Mexico; Mt. Emmons, Colorado – Fig...the underlying magma quenches against layers of quartz (±feldspar, molybdenite) that crystallized within |  | | Catalog/List | | Old No. l Headfnme. Whi ■ key Hlll Mine, Tuohnne County, CaUfomla (r■-,u. .SV•t- tor cr11•t•J lJaed gold...feldspar. 784 ADAMITE, Moha\'.1k Mine, San Bernardino County, r.alifornia. Group o f colorless to light green...chalcophanite crystals on \/ad. 104 ADAMITE, Quartz Mountain, Nevada. Pale blue to colorless nearly equant...785 ADAMITE (CUPRIAN),MohawkMine, San Bernardino County, California. Nicely spaced transparent jade green...goethite and quartz. Ref. Am. Min. 55:1447 (1970). 911 ALBITE,Clear Creek, San Benito County, California |  | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs... Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph by J. Scovil....Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper 91 References 467 Contributors...Round Mountain Mine Quartz, Lovelock area Acanthite Grossular, Nightingale district Quartz epimorph...district Quartz (amethyst) and Calcite Almandine-Spessartine Annabergite Gypsum Quartz, Petersen |  | | Book | | AFRICA widely in Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described |  | | Report (issue) | | Ore Deposits of the· Kokomo-Tenmile District, Colorado By M. H. BERGENDAHL and A. H. KOSCHMANN . I... PAPER 652 Prepared in cooperation with the Colorado Mining Industrial Development Board .. 1\ UNITED...____________________________ _ Biotite-muscovite quartz monzonite __________ _ Gneissic granite ______..._____________ _ Elk Mountain Porphyry ____________________ _ Porphyritic quartz monzonite _______________..._ Quail Porphyry ____________________________ _ Quartz monzonite __________________________ _ Lincoln |  | | Journal (article/letter/editorial) | | collector of minerals, particularly those of the Otavi Mountain Land in Namibia. Janet H. Clifford is a geologist...cavities in oxidized galena (or coating galena) in quartz veins (Greg and Lettsom 1858; Green and Briscoe...leadhillite is that of the alpine cleft; but the smoky quartz cleft in the Furka Pass area, Uri, Switzerland...noted, was largely overshadowed by the monster smoky quartz crystals found there (mindat.org, accessed 2013)...a number of important mines encircle the Otavi Mountain Land of Namibia; and although lead is often a |  | | Book (volume) | | variety and wealth of locality information concerning quartz gemstones are recognized in a separate chapter...Kobuk jade locality. Descriptions of San Diego County, California, gemstones and the mines in which they...the generous assistance of many residents of that county. My special thanks are extended to Elbert H. McMacken...Rhodonite, Idocrase (Vesuvianite), The Garnet Group. Quartz FAMILY GEMSTONES RarRE AND UnusuaL GEMSTONES Chrysoberyl...DECORATIVE GEMSTONES Granite, Graphic Granite, Unakite, Quartz Porphyry (Leopardite), Orbicular Gabbro-Diorite |  | | Journal (article/letter/editorial) | | pegmatites in the Spruce Pine District, North Carolina, USA Samuel E. Swanson*, William B. Veal Department of...texture with coarse (~ 1 cm) grains of feldspar, quartz and muscovite enclosed in a finer grained matrix...the granodiorites; major amounts of feldspars and quartz, accessory amounts of muscovite, garnet, and epidote...recrystallization, include epidote, muscovite, quartz, and grossular garnet. A few of the pegmatites...unzoned. Zoning in the pegmatites is simple with a quartz core, an intermediate zone of graphic granite, |  | | Report (volume) | | General features____________________________ Coosa County _________ ____________________ Randolph County...Cherokee County_____________________________ 72 Elbert County _____________________________ 75 Hall County__...County_______________________________ 76 Hart County. ___ __ __________________ 77, Lumpkin and Union counti...___________ S3 Pickens County _______-______________________ 83 Rabun County-_____________________________...____________ 86 Troup County ________________________________ 86 Upson County _______________________________ |  | | Report (volume) | | ............................................. Colorado.................................................of minerals that are widely distributed, such as quartz and calcite, have been omitted, except those that...especially from those of Arkansas, California, Colorado, New Mexico, Oregon, South Dakota, Tennessee,...minerals and rocks, their occurrence and uses: Colorado State Geol. Survey Bull. 6, 1913. 8 USEFUL...See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found |  | | Book (volume) | | 56 ct), Sweet Home Mine, Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...Dosen ONN/ QBI96-40247 Trade Distribution by Mountain Press Publishing Company P.O. Box 2399, Missoula...Cantlin, Ellis, [D; Jeannette B. Carillo, Gem Center USA, EI Paso, TX; Gary Christopher, The Prospectors Cache... Hughes, Boulder, CO; Duane L. Johnson, Rocky Mountain Soapstone, Butte, MT; Chris I. Johnston, Royal | | | Report (issue) | | 3i University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs... Majuba Hill Mine, Antelope district, Pershing County. N. Prenn coJlection. Photograph by J. Scovil....Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper MINERAL CATALOG 91 121 Gregory...Cinnabar Clinoclase and Cornubite Clinozoisite on Quartz Conichalcite on Olivenite Conichalcite onJarosite...Gold, Humboldt Mountain Gold, Mexican Mine Gold, Majuba Placer Gold, Round Mountain Mine Grossular, |  | | Book (edition) | | from the Tourmaline Q ueen .1ine, Pala, San Diego County, California. From a pen-and-ink drawing by W. E...are so widespread, as in the case of the alluvial quartz gemstones of the Midwest, that it is impossible...formations containing cryptocrystalline varieties of quartz, such as agate and petrified wood, extend over...(V esuvianite), The Garnet Group. 199 246 III QUARTZ FAMILY GEMSTONES IV RARE AND UNUSUAL GEMSTONES...Miners at Crystal Peak, Colorado 30. Pegmatite pocket, Crystal Peak, Colorado 31. Spodumene, Pala Chief |  | | Report (volume) | | Deposits of minerals of wide distribution, such as quartz and calcite, have been omitted, except those that...A. F. Rogers, Stanford University, Palo Alto. Colorado.........Prof. R. D. George, Boulder. Connecticut...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson |
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