 | | 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 (issue) | | Our Lucky Monday – a great collecting story Colorado, USA J. Scovil photo. Issue #6 The Collector’s...known as “Two Pillars”. T. Dorris photo. The Pikes Peak region has been producing amazonite and smoky quartz...miarolitic cavities (pockets) in the decomposed Pikes Peak granite. Beginning in 2000, Joe discovered an extensive...from Lucky Monday pocket, Smoky Hawk claim, Colorado, USA. 8.2 cm in length. Spirifer collection. amazonite...Editors: Paul Cragan (USA John Veevaert (USA) Associated Photographer: Jeff Scovil (USA) Contact: tom@spiriferminerals |  | | Journal (issue) | | on Amazonite 7.5 cm, from the Smoky Hawk claim, Colorado. Collected by the Dorris family; Tom Spann photo...Bacher; Reinhold Bacher photo. Fluorapatite, 3.3-cm crystal, from the Pulsifer quarry, Maine. Collected by...own favorite experiences is gazing raptly into a crystal pocket just after it has been opened, and all the...classic locality for spectacularly large apophyllite crystal clusters, which still rank as some of the largest...cleaned off the thaumasite to expose the entire crystal. It is free of damage thanks to the protective |  | | | | world, and worked on their identification and crystal structures. Despite this familiarity, however;...wide range of other facts about their origin, crystal form and mode of origin are given. The publishers...cobalt bloom 73 cobaltite 17 colemanite 54, 54 columbite 36 bastnasite 49 bauxite 37 bavenite 102, /03...50 nickel bloom 73 nickel vitriol 60 niobate columbite 36 nitrates 38 northupite 49 octahedrite 34 oligist...100, /0/ riebeckite 100 ripidolite 106 rock crystal 28; 31 opal, fire 32, 33 tiger’s eye 31 tinzenite91 |  | | Book | | world, and worked on their identification and crystal structures. Despite this familiarity, however;...wide range of other facts about their origin, crystal form and mode of origin are given. The publishers...cobalt bloom 73 cobaltite 17 colemanite 54, 54 columbite 36 copiapite 61 copper 4, 5 copper vitriol 59...50 nickel bloom 73 nickel vitriol 60 niobate columbite 36 nitrates 38 northupite 49 octahedrite 34 ...100, /07 riebeckite 100 ripidolite 106 rock crystal 28, 31 rosasite 47, 49 rubellite 96 ruby 25 |  | | Book | | This book provides a basic introduction to the crystal structure of minerals, as well as illustrations...crystals are considered to be a mineral called crystal structures. Natural crystals formed by geological...considered to be minerals. Microcline, Crystal Peak, Colorado, USA * 12 x 9x 5 om MINERALS: PRODUCTS OF...compositions and crystal structures. Each unique combination of elements and crystal structure is called...malachite produced this way keeps the original crystal shape of the azurite, it is called a pseudomorph | | | Book | | world, and worked on their identification and crystal structures. Despite this familiarity, however,·I...wide range of other facts about their origin, crystal form and mode of origin are gzven. The publishers...cobalt bloom 73 cobaltite 17 colemanite 54, 54 columbite 36 copiapite 61 copper 4, 5 copper vitriol 59...50 nickel bloom 73 nickel vitriol 60 niobate columbite 36 nitrates 38 northupite 49 octahedrite 34 oligist...rhodonite 100,101 riebeckite 100 ripidolite 106 rock crystal 28, 31 rosasite 47, 49 rubellite 96 ruby 25 ruby |  | | Book | | formulae. General properties. Here the mineral’s crystal system—the basic arrangement of its atoms—is specified...ALLOYS Silver Ag Silver is a member of the cubic crystal system but crystals are rare, the mineral occurring...states of Guanajuato and Chihuahua, Mexico. In the USA silver occurs at Keweenaw, Michigan, in association...copper ores, and at Butte, Montana, as well as Colorado, Arizona and Idaho. In Canada it occurs at Cobalt...Above: Copper from Lake Superior. Michigan. This crystal shows the enlarged faces of the rhombic dodecahedron |  | | Journal (issue) | | Cooper Nottingham, England Anthony R. Kampf L.A. County Mus. of Nat. Hist. Los Angeles, CA Steven R. Morehead...Michigan Correspondents Dudley Blauwet Louisville, Colorado Miguel Calvo Zaragoza, Spain Renato Pagano Milan...Wilson, R. H. Currier, C. A. Francis & S. White Ca-Mg-Fe-rich rhodonite from the Morro da Mina mine, Conselheiro....159 by T. Nikischer COVER: CALCITE (Co-rich) crystal cluster, 3.5 cm, from the Mashamba West mine, atanga...minerals during a school field trip to the Los Angeles County Museum. He served in the Army from 1954 to 1957 |  | | Book (edition) | | at the outstanding shows of the annual San Diego County Fair at Del Mar, California. In addition, the collections...Los Angeles, California, E. M. Gunnell, Denver, Colorado, Specimen Minerals, Ltd., Woodville West, South...compound names • Major mineral classes CHAPTER 4 CRYSTAL GROWTH 57 Crystals from melts, solutions and...crystals • Internal imperfections of crystals • Crystal and aggregate habits • Twinning CHAPTER 5 GEOMETRY...of crystallography • Cell shapes and systems • Crystal axes • How faces are related to axes • Axial ratios | | | Book (edition) | | the out- standing shows of the annual San Diego County Fair at Del Mar, California. In addition, the collections... Denver, Australia, MinMassa- California, Colorado, Gregory, Speci- Bottley England, and others...compound names - Major mineral classes CHAPTER 4 CRYSTAL GROWTH bi Crystals from melts, solutions and...crystals - Internal imperfections of crystals - Crystal and aggregate habits Twinning CHAPTER 5 GEOMETRY...of crystallography - Cell shapes and systems - Crystal axes - How faces are related to axes - Axial ratios |  | | Book | | essentials of crystallography, chemistry, and crystal structure. These provide a firm basis for discussion...crystallography at the beginning of the text, crystal systems and associated conventions and terminology...minerals in order to avoid those lamentable errors in crystal forms and colors which are instantly apparent to...slightly reduced, and a few enlarged, as the diamond crystal of Plate 1, depicted in both natural and greatly...definition of the terms 'mineral', 'rock', and 'crystal' cannot be avoided at this stage. A rock is an |  | | Book (edition) | | the use of polarizing plastic film for testing crystal fTagments introduces concepts of oplical mineralogy...the outstanding sho,vs of the annual San Diego County Fair at Del Mar, California. In addition, the collections...Angeles, California, E. l\lf. Gunnell, Denver, Colorado, Specin1en Minerals, Ltd., Woodville \Vest, South...compound names • Major mineral classes CHAPTER 4 CRYSTAL GROWTH 57 Crystals from melts, solutions and...crystals • Internal imperfections o f crystals • Crystal and aggregate habits • Twinning CHAPTER 5 GEOMETRY |  | | Book | | the University of Colorado and I-Iarvard University, is Professor of Geology at Colorado College. The author...Federation of Mineralogical Societies, and the Colorado Mineral Society. He has collected and prospected... A bruised or scratched specimen, or a broken crystal, has little to recommend it, and a mineral of unknown...examination. The tools used in collecting minerals are fe,v in number. The first and most indispensable tool...unnecessary amount of waste rock adhering, or part of a crystal or crystals may be covered up by the matrix. This | | | Book | | the University of Colorado and Harvard University, is Professor of Geology at Colorado College. The author... A bruised or scratched specimen, or a broken crystal, has little to recommend it, and a mineral of un¬...unnecessary amount of waste rock adhering, or part of a crystal or crystals may be covered up by the matrix. This...Four-drawer cabinet for storage of smaller mineral, crystal, and rock speci¬ mens. Many specimens can be stored...requiring only a familiarity with their appearance (crystal form or habit) and their other properties (such |  | | Book (edition) | | Co\·er photo: \\ 7 ulfenite, Rowley Mine, Maricopa County, 4 cm high specimen, Evan and Melissa Jones Collection...gemandmineralmuseum.arizona.edu) is located in the old Pima County Courthouse building at 115 North Church Avenue...minerals and a reere ed az ri e stope; then into the Crystal Lab and Gem Galleries to see how cry and how to...display, which includes several reconstructed crystal pockets. The display is accessed through an impressive...on the market. The mines at Bisbee, in Cochise County, have produced large quantities of gem-quality |  | | Book | | Cr Co Cu Dy Er Eu F Gd Ga Ge Au Hf He Ho H In 1 Ir Fe Kr La Pb Li Lu Mg Mn Hg Mo atomic number 13 51 18...the same contents as those of the Se As Br Ca Na Pb Fe Sb 1 Te Sr K Mn Ti inert gases. From this has evolved...principle governing our understanding of how Zr V Fe Cs (NO. ) (S03) (P03) (Se03) (As03) Co Cu W elements...form ions with several valencies. For example, iron (Fe) may occur as divalent Fe2+ or trivalent Fe3 + ,...complex anion to Above: The atomic pattern of a crystal of the metal ruthenium. This photograph, made with | | | Book | | ctid op fragmenta night fin aq ca.mifla fuerit.2 fe qs it aqilla la’ uerit incurrit mcbrog excoriat6c3...occurrence of | Chromium ae understood, the‘ more Fe clearly isotopes were i . symbol 8 é Cy 8 ae...ue 77Sena zo Mo Nitrogen Osmium Osvaen a) Ir Fe Ke |wergne 144.24 a 4 a i timber 60 aia 132...Vv Xe 2 Zn Zr 158.92 eB) ee 20hay 22 a2 64 fe = 40 47.90 131.30 vee : a 91.22 THE Right:...er Be Mg Fe Mn Pb Ti Ti v Mn ee Ww PE ee T+ E cl H Li Br | Na K Ca Sr Ba Fe Rb Cs Ni |  | | Book (edition) | | work now being published in phase equilibria and crystal-structure analyses, the work on syste1natic optical...of the properties. Chemical Formula: Until the crystal structure is known or at least until an accurate...with simple Miller indices) that are potential crystal faces or, when the bonds across the plane are few...representing crystal planes: ( ) Miller indices included in parentheses denote a single crystal plane. {...mineral by the relative development (or lack) of crystal faces is referred to as habit. Comn1on habits are |  | | Report (issue) | | be more instructive and show better the relaThe crystal forms have been tions of the various s[)ecies and...NON-METALS. 1. DIAMOND. Native carbon, C. common. Crystal faces Perfect octahedral cleavage. Brittle. Yellow...placer mining began. reported seeing a pale j^ellow crystal As early as 1849, Lyman which about the size of...observed in the gold gravels at Cherokee, Butte County, and this locality, became the most noted one in...short articles on California diamonds. A Amador County: few small stones have been picked up near the |  | | Book (edition) | | most generally accepted names for the thirty-two crystal classes and the addition of a short discussion...sought information such as chemical composition, crystal system, specific gravity, and hardness. Such data...essential facts and principles of the subject. A crystal is a homogeneous body bounded by smooth plane surfaces...tendency, especially by physicists, to use the term crystal in reference to any solid that has a definite atomic...ordered arrangement of atoms in the structure, and crystal refers specifically to the external expression |  | | 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...Humboldt County and the crystalline quartz collecting area on Petersen Mountain in Washoe County, permission...metamorphosed rocks as much as 1.8 Sierra Nevada, Colorado Plateau, and Columbia Plateau provinces, THE |  | | Book (edition) | | section, however, still in the has to do with crystal chemistry. In the descriptive mineralogy chapter...Properties of Crystals Crystal Symmetry 7 12 Crystal Notation 19 Measurement of Crystal Angles The Thirty-Two...Thirty-Two Crystal Classes Isometric System 55 Tetragonal System 71 Orthorhombic System 81 Monoclinic...Method 40 42 Hexagonal System Twin 31 32 Crystal Projections Triclinic 5 104 112 Rotation,...Silicates 220 220 Introduction Oxides 70 73 Crystal Chemistry 5. 141 368 Nesosilicates 373 Sorosilicates |  | | Book (edition) | | the stereographic projection, (2) the thirty-two crystal classes, (3) the calculation of axial ratios, and...ural and chemical considerations. The section on "Crystal Chemistry" has been enlarged to include enough...short discussion of t he vii viii PREFACE crystal chemistry of each class precedes the description...Shaub of Smith College for the photographs of the crystal models. CORNELIUS 8. HURLBUT, JR. July 1959 '...Introduction 4 Symmetry 17 Crystal Notation 22 Crystal Projections 33 Measurement of Crystal Angles 44 The Thirty-two |  | | Book (edition) | | is not essential to the subsequent treatment of crystal morphology, it is most helpful in the understanding...crystals. In our treatment of crystal rnorphology we proceed from the crystal system of lowest symrnetry...of ordered patterns. Within each crystal system, however, the crystal classes are arranged in order of...increasing symmetry of the crystal systems, this sequence of discussion of crystal classes is least cumbersorne...development of all crystal classes, it is those of highest symmetry in each crystal system that are usually |
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Crystal Peak, Teller County, Colorado, USA