 | | Report (volume) | | the Browns Canyon Wilderness Study Area, Chaffee County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1716-C...the San Isabel National Forest, south-central Colorado: U.S. Geological Survey Bulletin 1638, p. 40-42...SOUTH-CENTRAL COLORADO Mineral Resources of the Browns Canyon Wilderness Study Area, Chaffee County, Colorado...Area, Chaffee County, Colorado. (Mineral resources of wilderness study areas South-Central Colorado; ch...Mines and mineral resources Colorado Browns Canyon Wilderness. 2. Geology Colorado Browns Canyon Wilderness |  | | Journal (article/letter/editorial) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though ColĀ 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 (issue) | | Deposits of the Poncha Springs NE Quadrangle, Chaffee County,Colorado By RALPH E. VAN ALSTINE With a section... PAPER 626 Prepared in cooperation with the Colorado State Mining Industrial Development Board UNITED...Rhyolitic ash-flow tuff ______________________ _ Nathrop Volcanics _________________________ _ Browns Canyon...Ralph E. Van Alstine and Doak C. Cox _________ _ Colorado-American mine ______________ -_Delay adit and...Poncha Springs NE quadrangle. Geologic map of the Colorado-American fluorspar mine, Browns Canyon district |  | | Journal (article/letter/editorial) | | Two Point claim, Pikes Peak batholith, Teller County. The Collectorās Edge specimen, Jeff Scovil photo...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951,...up-to-date guidebook to the stateās minerals is Colorado Rockhounding, by Voynick (1994). Other published |  | | Report (volume) | | be changed by heat treatment or dyeing. Only the ruby, sapphire, spinel, emerald, rutile, and quartz of...or two of these qualities. The diamond, emerald, ruby, and sapphire are considered precious gems. Some...canary yellow in the diamond; pigeon-blood red in the ruby; cornflower blue in the sapphire; and grass green...price of a gem stone. Such gems as the diamond and ruby are rare, in addition to being beautiful and durable...the deep redpyrope garnet closely resembles the ruby in color, there is no comparison in expense and |  | | Journal (article/letter/editorial) | | Note: Gold in Rhyolite at Nathrop, Colorado Denver Nathrop # Pueblo COLORADO DAVID E. SEAMAN 36 Winter...Winter Street Norway, Maine 04268 Ruby Mountain at Nathrop, Colorado, has been noted for many years as...excellent spessartine garnet crystals and micro topaz crystals, both found in rhyolite. The locality was...while a gradĀ uate student at the University of Colorado in 1932. That was the year of my first collecting...collected over 500 specimens of the garĀ nets and topaz. RECENT NEW FINDS Following my retirement in 1973 |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive Ā„em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =Ā· - Ā·, 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 |  | | Journal (article/letter/editorial) | | Museum of Nature and Science 2001 Colorado Boulevard Denver, Colorado 80205-5798 jmurphy @ dmns.org PETER...Survey MS 150, Box 25046 Federal Center Denver, Colorado 80225-0046 pmodresk @ usgs.gov Unless otherwise...to 2000) J oin us for a gemstone tour around Colorado! Our field trip takes us from east to west in...in the same way you may have toured through Colorado on a mineral collecting trip. This route, from the...gemstones are known to occur. We cannot discuss every Colorado gemstone occurrence; rather, this is a general |  | | Journal (issue) | | 2008 Table of Contents Collecting Minerals in Colorado - Peter Modreski ...........................Pg...Mining Update .......................... Pg. 20 Colorado Fossil Woods - Frank Daniels ...................on collecting minerals in Colorado by Pete Modreski, the informative Colorado petriļ¬ed wood article by...the magazine so you get your very own copy! Colorado Minerals is the theme of the 2008 Denver Gem and...from the vicinity of Pikes Peak itself, Stove Mountain and Sentinel and Specimen Rocks; Crystal Park; |  | | Book (edition) | | ā _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ā : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils Americaās 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 ā
COLORADO GEM TRAILS AND MINERAL GUIDE ā
SKETCH MAPS BY MIGNON WARDELL PEARL |  | | 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...IDOCRASE lOLITE k:^ RUBY /^^ RUTILE SAPPHIRE 1^ TOURMALINE CRYSTALS TOPAZ CRYSTALS 4 GEM hunter's...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) | | more. "The Glove Mine is located in Santa Cruz County, Arizona, near the little town of Amado, on the...specimen with a pleasing combination of two minerals. COLORADO ā "I used to be a regular reader of R&M and a...spectacular, only good representative specimens of Colorado minerals. Half the fun is the trip anyway. No...consists solely of minerals I've found here in Colorado." ā letter dated Jan. 10, I960, from Doug Graham...in length. They come from Mt. Antero, Chaffee County, Colorado (altitude of pocket where found over 14 |  | | Journal (article/letter/editorial) | | garnet from the Topopah Spring Tuff at Yucca Mountain, Nevada, USA R. J. MOSCATI* AND C. A. JOHNSON U.S...Federal Center, Box 25046, MS 963, Denver, CO 80225, USA [Received 20 January 2014; Accepted 10 April 2014;...Spring Tuff of the Paintbrush Group from Yucca Mountain, in southern Nevada. The Miocene-age Topopah Spring...garnet. Vapour-phase topaz and economic deposits associated commonly with topaz-bearing rhyolites (characteristically...not found in the Topopah Spring Tuff at Yucca Mountain. Based on their occurrence only in lithophysae |  | | Journal (article/letter/editorial) | | is from Leiperās quarry at Springfield, Delaware County, Pennsylvania (Peters 1984). When the spessartine...feldspar, and quartz in the former, and bixbyite, topaz, sanidine, and pseudobrookite in the latter. Because...to 7 cm across occur near Middletown, Middlesex County, and massive spessartine and relatively small crystals...localities in Figure 2. A classic Avondale, Delaware County, Pennsylvania, spessartine specimen with a major...HUK [OL *PU JPUUH[P4PULYHS:VJPL[` Delaware County, Pennsylvania. Detailed work by Lindsley and Peters |  | | Report (chapter) | | BULLETIN 160, 2004 205 Geochronology of the central Colorado volcanic field William C. McIntosh and Charles...Technology, Socorro, NM 87801 Abstract The central Colorado volcanic field (CCVF) consists of at least ten...volcanic field to the southwest, and overĀ lapped the Colorado Mineral Belt on the north and west. The CCVF was...determined for three other regional ignimbrites (Wall Mountain Tuff, 36.7 Ma; tuff of Stirrup Ranch, 36.5 Ma;...0 Ma), Guffey (36.1 Ma), Waugh Mountain (31.6 ā31.3 Ma), and Nathrop (30.4ā28.9 Ma). Dated plutons in |  | | Journal (issue) | | Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan Whatās new in Colorado minerals? ......................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar specimen; photo by John...Natural History for conceiving the idea of a second Colorado issue and for helping a great deal in bringing |  | | 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) | | MINERAL COLLECTING BY CAMPER IN COLORADO By LAWRENCE AND HARRIETTE SCHOPPEE 9 Greenbrier St., Springfield...investigating such a claim? We took our Camper to Colorado and now that state rivals Canada in our list of...campgrounds are available, and many new sites in Colorado are being opened every year. Our sleeping bags...described in Professor Richard M. Pearl's book, "Colorado Gem Trails and Mineral Guide." As in any other...before starting to collect in Colorado. Traveling from Massachusetts to Colorado is a trip in itself but don't |  | | Report (issue) | | 14: Topaz Perfect Cleavage ISBN 978-0-9790998-9-2 Publisher Lithographie, LLC Denver, Colorado, USA...Lithographie, LLC P.O. Box 11613 ā¢ Denver, CO 80211 ā¢ USA Phone 1.303.495.5521 ā¢ Fax 1.303.482.1238 www.lithographie...United States of America Photo Credits Cover: Topaz, 3.5 cm tall Capao Mine, Ouro Preto, Minas Gerais...Sigerman collection Robert Weldon photo Above: Topaz, 5.5 cm tall El Chalten, Santa Cruz, Argentina Scott...brooch/pendant is set with topaz from three different localities. Two Brazilian "Imperial" topaz gems make up the |  | | Journal (article/letter/editorial) | | J.N.ROSHOLT U.S. GeologicalSurvey, Denver, Colorado, USA and D.C.NOBLE Department of Geological Sciences... Harvard University, Cam bridge, Massachusetts, USA Received 20 May 1969 Dense primarily crystallized...0.94 +-0.01 0.98 + 0.01 1.0 Nathrop Volcanics (Oligocene), Colorado (aphyric rhyolite lava) [ 16, 17]...from the Western United States [6, 19]. The Ruby Mountain glass is unusually rich in uranium. The thorium...Nye County, Nevada, Geol. Soc. Am. Mem. 110 (1968) 65. [16] C.W.Cross, On the occurrence of topaz and |  | | 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 exceedĀ ing 11,000 feet, the average elevation...and J. A. MurĀ 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 |  | | Journal (issue) | | Colorado Springs Mineralogical Society Founded in 1936 Lazard Cahn Honorary President February 2020...of the Western Museum of Mining & Industry in Colorado Springs. He is currently working on a study of...gold mines. COLORADO SPRINGS MINERALOGICAL SOCIETY PO BOX 2 COLORADO SPRINGS, COLORADO 80901-0002 February...Denver Mining Club weekly meeting, Martin Palkovic, Colorado Geological Survey, Cretaceous Sedimentary Bedrock...ReturnFlows to the Arkansas River, Southeastern Colorado. Golden Corral Buffet & Grill, 3677 South Santa |  | | Journal (issue) | | - - - - - - - - - - - Mineral Collections 1n Colorado A Supplement to The Mineralogical Record November-December..."Smithsonian packet," Smoky Hawk claim, Florissant, Colorado. Collected in 2008; Dorris Family collection;...certificates for mines in the Cripple Creek District, Colorado, in 1898 and 1901. Sponsorship: This special supplement...Collecting in Colorado The Collections: Mel & Pam Bersch Ryan Bowling Ralph Clark Colorado School of Mines...Thompson George Witters Martin Zinn III and Colorado in the :Mineralogical Record Supplement to The |  | | Book | | oxygen form the minerals ruby and sapphire. The pigeon-blood red of the ruby is thought to result from...tourmaline, magnetite, zircon, gold, platinum, topaz, beryl, ruby and sapphire. One important rock in this...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...Fluorite Apatite 6. 7. 8. 9. 10. Feldspar Quartz Topaz Corundum Diamond (hardest) This is a very old scale |  | | Book | | MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine ā_ā< Ā¢ te om At _SHT 40...MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Richard Walker Holmes and Marrianna...Mines and minerals of the Great American Rift (Colorado-New Mexico). Bibliography: p. Includes index...index. 1. Mines and mineral resourcesāColorado. 2. Mines and mineral resourcesāNew Mexico. I. Kennedy, Marrianna...minerals of the Great American Rift in New Mexico and Colorado. Great American Rift is the name we use for a |
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Ruby Mountain, Nathrop, Chaffee County, Colorado, USA