 | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...associations of quartz found throughout the state rank it as one of the premier worldwide localities for that...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...for about 750 known mineral species.* Of these, quartz is one of the most desirable from a collector's |  | | 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...crystals that are rooted in the microcline-plagioclase-quartz wall zone Downloaded by [] at 04:12 15 May 2015...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 |  | | 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 |  | | 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 |  | | 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...metavolcanic rocks Hybrid gneisses and associated quartz diorite and granodiorite (Cretaceous and/or older)...Lakeview Mountain tonalite Lake Wolford leucogranodiorite Woodson Mountain granodiorite Indian Mountain leucogranodiorite | | | 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 |  | | 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 |  | | Report (issue) | | Phosphates Pumice, pumicite, and perlite pyrites Quartz crystal (7) 41 59 61 64 66 80 83 85 109 111 116 118...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 |  | | 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...amethyst crystal interiors on agate. Some with smoky quartz xls on agate. Others with blue white quartz xl...green xls on limonire. xl 35 C, 1x2 15C, 2x2 $1.50. QUARTZ PSEUDOS AFTER MIMETITE, Mex. White pseudo x1 on...crystals on quartz from Magnet Cove. 2x2 $2.00, 2x3 $2.75, 3x4 $5.50. Larger available. QUARTZ “HERKIMER |  | | 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...mixed with others of no value, as gold mixed with quartz, or galena mixed with calciteRocks are composed...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 four families |  | | Report (issue) | | -1:;3 Quartz crystal ( electronic grade), by Lauren A. Wright __ __ 459 Quartzite and quartz, by William...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...of different kinds of n1inerals likr feldspar, quartz, a11d 111ira, -n·hich are £on1Jd in granite. Both...physical features. Group I includes t hree great mountain areas-the . ierra XeYacla, the Klamath ~Iountains |  | | 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...Clarity in an otherwise common material. For example, quartz, which occurs in several colors, is a very common...purple color of the finest amethyst—a semiprecious quartz variety—is relatively rare. Star facet star facet |  | | Journal (issue) | | faceting quality. Also a number of loubly terminated quartz crystals were found Man O' War”: Mosaic ExguisiTus...Preston was born near Puckaway Lake, Green Lake County, Wisconsin, in April, 1876. He died in Phoenix...attended the local grade and high school of the county of his birth and then took i complete course in...married Ruth Pierce, who was i resident of Green Lake County, Wiscor } Mrs. Preston preced 1947. Mr. Preston...South Dakota, Yellowstone Na tional Park, Denver, Colorado, Estes Park, et Mr. Preston was instrumental in |  | | Book | | Production Controller Erika Pepe DK Picture Library Rose Horridge Picture Researchers Jo Walton, Julia Harris-Voss...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...pearly quartz goethite groundmass vitreous lustre blocky, azure blue crystal Spectacular crystal This |  | | Report (volume) | | ; Garland Peyton, director, division of mines, mining, and geology, department of natural rnsources,...the generous support of thousands of individual mine operators, distributors, and consurnors, as wdl...r1,n.s the output of fuels and other nonmetallics rose only 9 n,n d 5 perc<~n t in value, respectively...ind 11:,;Lriitl production (1935-39 average= 100) rose from 108 in 10:rn to ~t iw,v high of 122 in 1940;...Bituminous-coal mining suffered the largest increase in its fotulity rate, mainly because of a series of mine disast;ars |  | | Journal (article/letter/editorial) | | an excursion to the oldest copper mine in America-Schuyler copper mine near Arlington, N. J. His offer... Radu exhibited tourmaline from Maine, also rose quartz, clear beryl, very black biotite, and blue apatite...apatite. Dr. o. rvan Lee described the pegmatite dike at the Wyerman quarry near Newtown, Conn., where...collected black tourmaline, gamet, beryl, and rose quartz. Mr. Manchester reported molybdenite and albite...furnished a sumguided by Dr. O. Ivan Lee entered the old mine' Mr' H' gave some interesting assays also and found | | | Book | | Parsons-King Producer Nancy-Jane Maun DK Picture Library Rose Horridge Picture Researchers Jo Walton, Julia Harris-Voss...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 |  | | 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 |  | | 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 |  | | Book | | ashions . XII GEM CRYSTALS AND CUTTING . 1§ Crystal-Forms FORMS OF Flaws and Faults ce LE heeCarats... Tourmaline Stee Coes THE QUARTZ GEMS AND ORNAMENTAL STONES iF Quartz 231 231 231 233 234 236 238...250 250 250 251 Rock-Crystal Amethyst Smoky Quartz Cairngorm Citrine Rose Quartz . Chalcedony Carnelian...19th cen144 Quartz crystals . 178 “Fairy stone” 179 Forms of cabochon Diamond crystal cut . 183...183 184 Emerald-cut 186 Rose-cut 187 Brilliant-cut 188 [xiv] List of Illustrations On page |
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