 | | Journal (article/letter/editorial) | | Figure 1: View of the Crystal Mountain district, looking west. Crystal Mountain is in the center background...from the Pegmatites of the Crystal Mountain District LARIMER COUNTY, COLORADO MARK I. JACOBSON 1350 E .... Easter Avenue Littleton, Colorado 80122 B L U E A P A T I T E C R Y S T A L S , purpurite, chrysoberyl...collected in the Crystal Mountain district. This is one of the few pegmatite districts in Colorado where nei...wishing to make significant con tributions to pegmatite mineralogy and geology. One pur pose of this |  | | Journal (article/letter/editorial) | | cm long), Beebe Hall, McCain Valley, San Diego County, California. Cal and Kerith Graeber specimen; Jeffrey...is a beryllium aluminum silicate with hexagonal crystal symmetry. Its typical shape is an elongated six-sided...feature some of the finest aquamarinesfound in Colorado and other areas of the United States. Aquamarine...mineral at this year’s show, but it is also the Colorado state gemstone, having earned that distinction...spectacular gemstones found on Mount Antero in central Colorado. and project into the white quartz core. The portion |  | | Report (volume) | | Pegmatites of the Crystal Mountain District, Larimer County, Colorado GEOLOGICAL SURVEY BULLETIN 1011...1011 Pegmatites of the Crystal Mountain District, Larimer County, Colorado By WILLIAM R. THURSTON GEOLOGICAL...---------------------------------------History of mining-_-_--___--__-----------.----__-----------_-_ Previous...Front Range.-___________-Geology of the Crystal Mountain district----------------..---.--Country rocks ______-_---__--_-...-___-_-_._____-_ Mineral resources of the Crystal Mountain district___________________ Descriptions of |  | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...a k e w o o d , Colorado 80225 DIANNE L. K I L E 333 S a l e m Street Aurora, Colorado 80011 C O L O...above sea level; with more than eight hundred mountain peaks exceed ing 11,000 feet, the average elevation...and J. A. Mur phy for an update to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS... Quartz was a familiar gemstone to many early Colorado residents, as documented by an extensive body |  | | 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 |  | | Report (issue) | | GEOLOGY AND MINERAL RESOURCES OF SAN DIEGO COUNTY, CALIFORNIA By F. HAROLD WEBER JR., California...parts of several sections, by R. M. Stewart COUNTY REPORT California Division of Mines Ferry Building...CAMPBELL, Director AND GEOLOGY State Geologist COUNTY REPORT ^ Price $8.00 3 CONTENTS Page ABSTRACT...Lakeview Mountain tonalite Lake Wolford leucogranodiorite Woodson Mountain granodiorite Indian Mountain leucogranodiorite...__ Roblar leucogranite Other intrusive bodies Pegmatite and aplite dikes Economic significance __ ____ |  | | Book (volume) | | (25.56 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...events to bring the history of North American gem mining up to date. Here, then, is the latest, most complete...and interviews with persons actively engaged in mining gemstones. Pertinent references are furnished throughout |  | | Book | | P. Blake, professor of mineralogy, geology and mining at the College of California, parent to the University...California, and published in the fourth and sixth State Mining Bureau reports. Then beginning in 1914 with a volume...project, and who also prepared the majority of the crystal drawings for publication. H. Earl Pemberton Lake...Nevada and the Klarnath Mountains provinces. These mountain regions , together with the Basin Ranges and Mojave...are reported by county of occurrence. Map 1-2 shows the county boundaries and county names. When possible | | | Book | | P. Blake, professor of mineralogy, geology and mining the at College of California, parent to the...mineralogist of California, and pub- and sixth State Mining Bureau reports. Then beginning volume prepared...support for also prepared the majority of the crystal drawings for publication. H. Earl Pemberton ...Nevada and the Klamath Mountains provinces. These mountain regions, together with the Basin Ranges and Mojave...species are reported by 1-2 shows the county boundaries and county names. When possible, locations of mines | | | Book (volume) | | rhoColorado; eolorless scheelite (19.66 cc), Kern Cowny, California;...Vivid blue matched benitoite gems from Sai, Benito County, California, consisting of 52 benitoites and 75...and interviews with persons actively engaged in mining gemstones. Pertinent references are furnished throughout... most likely in Canada. Systematic large-scale mining of sapphire-bearing gravels in Montana is beginning...operators, Morefield Mine, Amelia, VA; Max & Suzy Berchtold, Royal Rainbow Mine, Laytonville, CA; Ralph |  | | Report (issue) | | Pumice, pumicite, and perlite pyrites Quartz crystal (7) 41 59 61 64 66 80 83 85 109 111 116 118 121...and Chemical Corporation near Salinas, Mimtercy County 224-225 Aerial photo showing sea-water chemical...Calaveras County. li, Photo showing Permaneute Cement Company plant, Permanente, Santa Clara County _ A, Photo...Sonora, Tuolumne County. /?, Photo showing Foucii-Tlioinpsdn pumice pit. Siskiyou County Aerial photo showing...showing view east toward clay pits at Lincoln, Placer County Photo showing Kaiser Steel Corporation's blast |  | | Book | | A HANDBOOK for MINE PROSPECTING tn MANITOBA Geology and Minerals of MANITOBA Prepared for...Zirconium 149 CHAPTER IX Corundum 151 Garnet 152 Silica 155 Cryolite 165 Feldspar Fluorspar 166 Andalusite...composition in that they are partly composed of silica, the substance of which Most of quartz is ...completely composed. —Minerals composed partly of silica are The rock-forming silicates mostly be long to...feldspars and soda feldLime feldspars are low in silica. Such well-known rocks as granite and syenite are |  | | Journal (volume) | | Logan, District Mining Engineer O. McK. Laizure, District W. Burling Tucker, Reid J. Mining Engineer...Engineer District Sampson, Assistant Mining Engineer District Engineer Ohas. V. Averill, District Mining...Junior Mining Engineer (Librarian) San Francisco TABLE OF CONTENTS Page REPORTS OF DISTRICT MINING...Field District Sacramento Field District San Francisco Field District Los Angeles Field District 8 Miner...Miner al Resources of San Diego County 56 GEOLOGIC BRANCH 56 Current Notes Geology and Oil Possibilities |  | | Journal (issue) | | month wc hove a number of very fine crystals and crystal groups obtained from our recent trip into Mexico...and crystal producing areas and obtained choice speci mens from each locality. AMETHYST CRYSTAL GEODES...than a ton of these in stock. Many with amethyst crystal interiors on agate. Some with smoky quartz xls...cubes as single xls. V2" 25c. 1" 50c SPECIAL: CRYSTAL MIX FROM MEXICO. Many types of crystals from the...CUSTOMERS, SCHOOLS, MUSEUMS, ETC. HUNDREDS OF CRYSTAL SPECIMENS ON OUR LATEST LIST. SEND FOR YOUR FREE |  | | Report (issue) | | Report 84 FETID BARITE OCCURRENCES, WESTERN BERKS COUNTY, PENNSYLVANIA by Samuel W. Berkheiser, Jr. Pennsylvania...showing the area of investigation in western Berks County, Pennsylvania 7. Photograph of a fragment of finely...of a barite nodule showing various textures and crystal habits 13. Photograph of a fragment of a barite...surface of a bladed crystal 16. Photomicrograph of a selvaged boundary of a barite crystal 17. Photomicrograph...Photomicrograph of a kink-band selvaged boundary of a barite crystal 6 7 13 16 18 22 23 25 26 27 28 28 29 30 31 |  | | Book | | are Crystals? Crystal Habits 20 22 Phosphates, Vanadates, and Arsenates 147 Crystal Systems Gems ...profile information (including illustration of crystal system in mineral entries) MINERALS | CARBONATES...o p q vitreous lustre 3.8 KEY rhombohedral crystal PROFILE Monoclinic 4 m n o p q name of mineral...vitreous lustre blocky, azure blue crystal Spectacular crystal This group of rhodochrosite rhombohedrons...quartz crystals. VARIANTS Bladed crystal A single, bladed azurite crystal Tabular crystals Thin, parallel |  | | Report (issue) | | .A. Wright______________________ -1:;3 Quartz crystal ( electronic grade), by Lauren A. Wright __ __...the general public for whose ultimate good the mining industry exists. Respectfully subnutted, DE\\TrrT...mineralogy, general geolog~-, occurrences in California, mining methods, treatment, utilization, marketing, and...physical features. Group I includes t hree great mountain areas-the . ierra XeYacla, the Klamath ~Iountains...in the eYolution of the geologic past. ...\.s mountain areas. they gave source to 8ediments which filled | | | Book | | Vanadates, and Arsenates 147 Crystal Systems What are Crystals? Crystal Habits Gems Silicates 166...profile information (including illustration of crystal system in mineral entries) name of mineral or...chemical composition and a distinctive internal crystal structure. Most minerals are formed inorganically...composition and are both iron sulfide, their differing crystal structures make them different minerals. rosette-shaped...activity. Rhyolite is made up:of crystals of high-silica minerals. ELECTRICAL CHARGE AND COMPOUNDS A mineral |  | | Journal (volume) | | Third Floor, Ferry Building, San Francisco 11 District Offices State Building, 217 West 631 J Street...thousand books and scientific journals on geology, mining, mineralogy, chemistry, metallurgy, and related...devoted to the petroleum and mining industries, and newspapers from the mining centers of the state exhibits...exhibits of minerals, rocks, mine models, etc. a service laboratory for the determination of California minerals...minerals and a conference room with a mining engineer in attendance to serve the public and to sell publications |  | | Book | | Properties 20 Where Gemstones are Found 24 Mining Gemstones 26 Cutting Gems 28 Polishing and...the mineral, the result is the formation of a crystal. Transparent gems, such as BEAUTY The first quality...such as obsidian and some organic gems, have no crystal structure. gemstones, so that in the finished...dissolved in freshwater or seawater. Alabaster, topaz crystal This diagram illustrates the processes by which...processes. ; staurolite ironstone concretion crystal pegmatite — TOPAZ IN IGNEOUS ROCK Gems in different |  | | Book | | textbook; If emphasizes chemical relationships and crystal structures with some introduction to rocks and...Solutions 36 Crystals 38 Crystal Systems Twinned 44 Crystals 46 Crystal Habit Imperfections in...Crystals 50 Crystal Inclusions 52 Properties of Minerals Determination of Crystal Structures 59...used today to classify minerals. The internal crystal structure of minerals, however, could only be guessed...mineralogists with the tool they needed to study crystal structures, but it was not until 1912 that Max |  | Kogel, Jessica Elzea, Trivedi, Nikhil C., Barker, James M., Krukowski, Stanley T. - Eds. (2006) Industrial Minerals and Rocks (7th ed.) Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO. | Book (edition) | | © 2006 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition...edition published 2009. © 2006 by the Society for Mining, Metallurgy, and Exploration. All rights reserved...edition published 2009. © 2006 by the Society for Mining, Metallurgy, and Exploration. All rights reserved...for Mining, Metallurgy, and Exploration, Inc. (SME) 8307 Shaffer Parkway Littleton, Colorado, USA 80127...763-3132 www.smenet.org Copyright © 2006 Society for Mining, Metallurgy, and Exploration, Inc. Eletronic edition |  | | Journal (volume) | | Third Floor, Ferry Building, San Francisco 11 District Offices State Building, 217 West First Street...thousand books and scientific journals on geology, mining, mineralogy, chemistry, metallurgy, and related...devoted to the petroleum and mining industries, and newspapers from the mining centers of the state exhibits...exhibits of minerals, rocks, mine models, etc. a service laboratory for the determination of California minerals...minerals and a conference room with a mining engineer in attendance to serve the public and to sell publications |  | | Journal (volume) | | thousand books and scientific journals on geology, mining, mineralogy, chemistry, metallurgy, and related...devoted to the petroleum and mining industries, and newspapers from the mining centers of the state exhibits...exhibits of minerals, rocks, mine models, etc. a service laboratory for the determination of California minerals...minerals and a conference room with a mining engineer in attendance to serve the public and to sell publications...mineral resources, mineral industry, geology, and mining operations of California is distributed to the |  | | Journal (article/letter/editorial) | | an excursion to the oldest copper mine in America-Schuyler copper mine near Arlington, N. J. His offer...and blue apatite. Dr. o. rvan Lee described the pegmatite dike at the Wyerman quarry near Newtown, Conn...quartz. Mr. Manchester reported molybdenite and albite from Bedford, N. Y., and aquamarine from Bayliss...furnished a sumguided by Dr. O. Ivan Lee entered the old mine' Mr' H' gave some interesting assays also and found...exhibited joint bulletin of the a as published district, the on area taken from his bulletin U. S. G. |
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