 | | Journal (article/letter/editorial) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though Col orado...orado topaz may not compare in size with that found in Brazil, gemmy crystals up to 4 inches have been found...(PJM), 975 (TCM) Box 25046, Federal Center Denver, Colorado 80225-0046 A ccording to Cross and Hillebrand...discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector of Colorado Springs."...Park area. The largest fine-quality topaz specimens in Colorado occur in several separate and distinct |  | | 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 (edition) | | and often gems can be found. valuable For the mountain ranges and level for the ist to States contain...6. Orthoclase 1. Talc 2. Gypsum 7. Quartz Topaz Corundum 10. Diamond 3. Colcite 8. 4. Fluorite.../^^ RUTILE SAPPHIRE 1^ TOURMALINE CRYSTALS TOPAZ CRYSTALS 4 GEM hunter's GUIDE (Cross-seaion at...weakness in the molecular structure of the mineral. Topaz, for instance, cleaves readily along the short direction...cation (moss-like), will be frequently misled All topaz crystal And is such a chameleon color, or jasper) |  | | Journal (article/letter/editorial) | | 1, 1944 STRUCTURE AND PETROLOGY OF SPECIMEN MOUNTAIN, COLORADO BY ERNEST E . WAHLSTROM CONTENTS Page...ILLUSTRATIONS Figure Page 1. Outline map of north-central Colorado................................................................... 78 2. Geologic map of Specimen Mountain area............................................... 81 3. Geologic cross sections of Specimen Mountain.............................................Iceberg Lake to Specimen Mountain................ 84 6. Larsen plots of Specimen Mountain rocks........ |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. Eckel (1961). |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak Region...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils America’s Mountain: Pikes Peak and the Pikes...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ★ COLORADO GEM TRAILS AND MINERAL GUIDE ★ SKETCH MAPS BY MIGNON WARDELL PEARL |  | | Journal (article/letter/editorial) | | 83:16-30 9 Springer-Verlag 1983 The Petrogenesis of Topaz Rhyolites from the Western United States E.H. Christiansen...Arizona 85287, USA 1 Department of Geology, University of Iowa, Iowa City, Iowa 52242, USA z Applied Geologic...Geologic Studies, Englewood, Colorado 80110, USA ,Abstract. High-silica topaz-bearing rhyolites of Cenozoic...Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched...elements (e.g. Li, Rb, Cs, U, Th, Be). In addition to topaz, the rhyolites contain garnet, bixbyite, pseudobrookite |  | | Report (volume) | | octahedron. Ready cleavage, however, can be a handicap; topaz and kunzite, for example, are difficult to cut into...Apatite . 6. 7. 8. 9. 10. Orthoclase Quartz Topaz Corundum Diamond The numbers preceding each mineral...to lapis lazuli and other blue stones; the term "topaz," to all yellow stones; and 206 CONTRIBUTIONS...some of the tints rarely found in nature. Yellow topaz from Brazil can be heated carefully and cooled to...permanent pink, resembling the rare, natural pink topaz. In a similar manner a colored zircon may be heat-treated |  | Burt, Donald M., Sheridan, Michael F., Bikun, James V., Christiansen, Eric H. (1982) Topaz rhyolites; distribution, origin, and significance for exploration. Economic Geology, 77 (8) 1818-1836 doi:10.2113/gsecongeo.77.8.1818 | Journal (article/letter/editorial) | | ArizonaState University,Tempe,Arizona85287 Abstract Topaz rhyolitesare fluorine-richalkaline siliciclavasand...shallowintrusivesthat are characterizedby the presenceof topaz(A12SiO4F2) in gascavities,commonlyassociated with...soccuron both sidesof the ColoradoPlateau (in Colorado,New Mexico, Arizona, Utah, and Nevada) and in...(carbonaterocks) and water tableswere presumablyhigh. Most topaz rhyolite lavasare not associated wth volcanogenicmineralization...nonreactive,and water tablescould have been low. Topaz rhyolitesof both the productiveand nonproductivetype |  | | Book | | comfort and time to hold in their hands a single specimen of a gemstone never before seen by human eyes...is enhanced. They could probably buy a similar specimen in a rock shop or jewelry store for a fraction...tourmaline, magnetite, zircon, gold, platinum, topaz, beryl, ruby and sapphire. One important rock in...desires. Sometimes the talus slopes at the base of a mountain contain rich indications of a dike or sill above...famous was the single beryl stone found in Oxford County in Maine that weighed 18 tons and was 18 feet in |  | | Book | | A. Jobbins Butterworth-Heinemann Gem Books Topaz m(JTTERWORTH EINEMANN Butterworth-Heinemann Ltd...Library Cataloguing in Publication Data Hoover, D. B. Topaz. - (Butterworth-Heinemann Gem Books Series) I. Title...Profile xii 1 Topaz - Historical perspectives 1 Introduction 1 Etymology of topaz 1 Topaz in ancient times...times 3 Topaz in Roman times 8 The Dark Ages 12 The Middle Age~ - topaz changes colour The beginning of...of empiricism 15 13 2 Large and important topaz gems and crystals 20 Introduction 20 Giant uncut crystals |  | | Book (volume) | | Hallelujah Junction, Nevada; blue, cushion cut topaz (25.30 ct), Ramona, California; brownish yellow...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 |  | | Book (volume) | | 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...GEMSTONES Diamond, Corundum (Ruby and Sapphire), Beryl, Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene...Antero aquamarine matrix specimen . Mesa Grande morganite crystal . Four topaz crystals . Drawing of New...New Hampshire topaz crystal . A cut topaz . The Little Three Mine . Drawing of Ramona Topaz crystal . View |  | | Report (issue) | | the major product (as at Climax and Henderson, Colorado, and Questa, New Mexico), or is a co- or byproduct...XVT XVA XWA XWI XWY ALASKA ARIZONA CALIFORNIA COLORADO GEORGIA IDAHO MAINE MISSOURI MONTANA NEVADA NEW...cross sections of the Pine Grove-B la*n Mountain area. Beaver County, Utah: U. S. Geological Survey Open-File...molybdenum system, southern wah wah Mountains, Beaver County, Utah (abstract): American Institute of Mining...deposits of the Mount Antero region, Chaffee County, Colorado: U.S. Geological Survey Bulletin 982-D, p | | | Book (volume) | | Hallelujah Junction, Nevada; blue, cushion cut topaz (25 .30 et), Ra1nona, Caufornia; brownish yellow...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...Cantlin, Ellis, ID; Jeannette B. Carillo, Gen1 Center USA, El Paso, TX; Gary Christopher, The Prospectors Cache...W Hughes, Boulder, CO; Duane L. Johnson, Rocky Mountain Soapstone, Butte, MT; Chris I. Johnston, Royal |  | | Book (edition) | | from the Tourmaline Q ueen .1ine, Pala, San Diego County, California. From a pen-and-ink drawing by W. E...PRINCIPAL GEMSTONES Diamond, Corundum, Beryl, Topaz, Opal. II 68 IMPORT ANT GEMSTONES The Feldspar...Beryl-bearing pegmatite, Baja California 19. Sequist Ranch topaz area, Texas 20. Little Three mine, Ramona, California...pocket in pegmatite, Baja California 22. Drawing of topaz crystal forms 23. Views of opal mines, Spencer,...opal, Spencer, Idaho 25. Drawing of hyalite opal specimen, Mexico 26. Hyalite opal photomicrograph 2 7. |  | | Report (volume) | | CHARLES D. WALCOTT, DIRECTOR A GAZE~?TEER OF COLORADO BY HEN.R Y GANNETT WASHINGTON GOVERNMENT PRINTING... _A GAZETTEER OF COLORADO. By HENRY ' GANNET,T. GENERAL DESCRIPTION. Colorado is_situated about midway...the Front and Park ranges is a series of high mountain valleys extending from north to south, separated...GAZETTEER OF COLORADO. through the Park Range on its way to join Green River, forming the Colorado. Middle...peaks exceeding 14,000 feet. At the north is the Mountain of the Holy Cross, with a height of 14,170 feet; |  | | Journal (article/letter/editorial) | | Knute Carlson, Box 702, Wasilla, Alaska. The black specimen is basanite (quartz). The other consists of dark...the results are." Readers desiring to obtain a specimen or two of this unusual quartz crystal are urged...MINERALS not easy to collect now. The other specimen is from Stevenson (Fairfield Co.), Conn., in a...is an attractive specimen. ILLINOIS — "Under separate cover I am sending you a specimen which I would like...Co.), 111. You will notice that a part of the specimen is polished (amateurish of course). I polished |  | | Report (issue) | | younger h1gh-s1Uca rhyoMtes and granites from Colorado and north-central New Mexico by 1X Celia H....younger high-silica rhyolites and granites from Colorado and north-central New Wexico Celia H. Steigerwald*...younger high-silica rhyolites and granites from Colorado and north-central Ney Mexico* The data were compiled...the many granite molybdenite system prospects in Colorado* We then decided to broaden the data bank to include...younger high-silica rhyolites and granites in Colorado for which chemical data were available* Our aim |  | | Report (issue) | | the Rocky Mountain Section meeting of The Geological Society of America Boulder, Colorado, 1973 Edited...SOCIETY OF AMERICA, INC. 3300 Penrose Place Boulder, Colorado 80301 24 AUG 1990 The Memoir series was originally...northwestern Colorado and its implications concerning tectonism and the origin of the Colorado River system...Cenozoic sedimentation and deformation in northern Colorado and AGIOS ATCAGws jaceeet ty pes wien ano os Kar...helt 249 Neogene tectonism in south-central Colorado... a 2) 7 min 4 am ie a - =a, geek @a |  | | Report (volume) | | Pa. Colorado Museum of Natural History: Proceedings, vol. 13 (nos. 1-3). Denver, Colo. Colorado Scientific...Proceedings, vol. 13 (nos. 4, 5). Denver, Colo. Colorado School of Mines: Mines Magazine, vols. 23, 24...Colo. Colorado, University of: Studies, vols. 20 (nos. 2-4), 21, 22 (no. 1). Boulder, Colo. Colorado-Wyoming...Frederick James. 20. Middle River gold field, Victoria County, Nova Scotia: Canada, Geol. Survey, Summary Kept...Genesis of the mica pegmatite deposits of Latah County, Idaho: Econ. Geology, vol. 28, no. 1, pp. 41-58 |  | | Book (edition) | | atid aeseae eueneSasehr i ia Bdtit _WYOQMING COLORADO _ LADORE 7C CRAIG r3GRANBY 17d KREMMLING...COEORADORI 2 NEW MEXICO x pec, Inn? UKE) COLORADO TOURS LEGEND NUMBERED TOURS UNNUMBERED TOUR...Gallege COLORADO A Guide to the Highest State WITHDRAWN AWAACK TAY 2 \e Line COLORADO A Guide...Program Projects Administration of the State of Colorado AMERICAN GUIDE SERIES ILLUSTRATED HASTINGS...Note About the New Edition This revision of Colorado, A Guide to the Highest State, brings abundant |  | | Report (issue) | | metamorphosed hydrothermal system at Pine Canyon. Piute County, Utah. U.S.A. [abs.]: Mineralogical Society (London)...mineralogy of the Cerrillos copper deposit, Santa Fe County, New Mexico: New Mexico Geological Society Guidebook...for the tectonic development of the southeastern Colorado Plateau boundary: Journal of Geophysical Research...origin of Paleo- and Mesoproterozoic rocks of the Colorado province, U.S.A.: Precambrian Research, v. 63...1986, Isotope and trace element geochemistry of Colorado Plateau volcanics: Geochimica et Cosmochimica |  | | Book (volume) | | orthorhombic appearance and somewhat resembling topaz have been described;! they have a diamond-shaped... mately 84 in. (21 cm) in length. Pikes Peak, Colorado. Crystal approxi- Amer. Mus. Nat. Hist. coll...average of 1.2° per cm.® A crystal from Pikes Peak, Colorado, of normal habit elongated along the c-axis showed...Bolivia, in sulfide veins; and at Hamburg, Cochise County, Arizona. Small twins up to 1.5 mm. in size occur...orders of abrasive hardness of quartz {0001} and topaz parallel the c-axis, reversing with changing size |
|
