 | | Report (volume) | | Precambrian Deposits of Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado U,S. GEOLOGICAL SURVEY... Precambrian Deposits of Zinc-Copper-Lead Sulfides and Zinc Spinel (Gahnite) in Colorado By DOUGLAS M. SHERIDAN...1921Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado. (Geological Survey bulletin...Geology, Stratigraphic-Precambrian. 3. Geology-Colorado. I. Raymond, William H. II. Title. III. Series...amphibolite facies Deposits in the vicinity of Salida Gahnite and its significance . . . Economic potential |  | | 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 | | of minerals -from the native elements (diamonds, copper, gold, silver, and sulfur) through sulfides, tellurides...cm (41/i in. ) high from Tourmaline Queen Mine, San Diego County, Pala, California. Back Cover: Azurite...Inquiries should be addressed to Abbeville Publishing Group, 488 Madison Avenue, New York, NY 10022. Printed...contajning a metal and an oxygen-bearing anionic group. For example, calcite is a forn1 of calcium carbonate...particularly valid in terms of monetary value. The "big four" are nonetheless the most popular and dominant |  | | Book (edition) | | Physical Properties and Char acteristics ° culing Mining, and Cutting . i Fy 3 Ve, < $24.95 Can. $32...Changes in Color 32 Refraction of Light 36 _ 64 Mining Methods Cutting and Polishing of Gems 69 Engraving...Classifications 84 85 Value of Gemstones 126 Tourmaline Group Fire Opal 168 . | 85 Description of Gemstones...140 Chalcedony 142 142 see 142 oo 120 Garnet Group ie ‘ 176 Zoisite Species Tanzanite 176 Prasiolite...Anyolite 176 : 178 Hematite . 178 Pyrite 180 Feldspar Group Amazonite Moonstone 180 180 Orthoclase 180 Labradorite |  | | Report (volume) | | and Northern Park Range Vicinity, Jackson and Routt Counties, Colorado By GEORGE L. SNYDER, U.S. GEOLOGICAL...and northern Park Range vicinity, Jackson and Routt Counties, Colorado. (Studies related to wilderness-wilderness...mineral resources-Colorado--Jackson County. 2. Mines and mineral resources-Colorado-Routt County. 3. Geology-Colorado--Jackson...Geology-Colorado--Jackson County. 4. GeologyColorado--Routt County. I. Patten, Lowell L. II. Daniels, Jeffrey...Zirkel Wilderness and northern Park Range vicinity, Colorado, that are being considered for wilderness designation |  | | Book (edition) | | Physical Properties and Characteristics Finding, Mining j and Cutting ^ W& \ Triangle Hexagon ...Types of Deposits 53 12 Origin and Structure Mining Methods 55 58 of Gemstones Cutting and Polishing...Cannel Coal 226 Ivory 226 Odontolite 226 Amber 228 Pearl 230 240 New on the Market Verdite 240 Charoite...amber, garnet, jade, jasper, coral, lapis lazuli, pearl, serpentine, emerald, and turquoise. These stones...Citrine or yellowish fired amethyst Korean jade Copper sapphire' Lithion amethyst Lithion emerald Madeira |  | | Journal (article/letter/editorial) | | Province, USA Robert S. Houston Geology Department, Universityof Wyoming, Laramie, WY 82070, USA (Received...near plate margins of the Archean Wyoming Province, USA. In: G. Gadl and K. Schulz (Editors), Precambrian...shale of the foredeep basin, anomalous platinum group element values in layered complexes of the island...Trans-Hudson fold belt, and on the south by the Colorado Proterozoic Province where Proterozoic island...Department, University of Wyoming Laramie, WY, 82070, USA. 0301-9268/92/$05.00 margin is exposed in the Sierra |  | | Book (volume) | | & MINERAL GUIDE Where & How to Dig, Pan and Mine Gems & Your Own | Minerals KATHY J. RYGLE & STEPHEN...vacation stops at a roadside “dig your own” gem mine. Junior finds a sapphire the size of a peach and...) Many an unsuspecting tourist has stopped at a mine to try his or her luck and become a rockhound for...Idaho Arizona California lowa Minnesota Montana Colorado Hawaii Nebraska North Dakota Oregon South Dakota...Northeast States Connecticut Delaware Kentucky District of Columbia Illinois Indiana Louisiana Maine |  | | Book (edition) | | DEPOSITS AND PRODUCTION OF GEMS Types of deposits 49 Mining methods 51 54 CUTTING AND POLISHING OF GEMS Engraving...GEMSTONES Diamond 70 Spodumene 114 Ruby 82 Quartz group 116 Sapphire 86 Jade 154 Emerald 90 Peridot 158...96 Hematite, Pyrite 162 Chrysoberyl 98 Feldspar group t 64 Spine! 100 Rhodochrosite, Rhodonite 168 Topaz...Amber 220 Pearls 222 Cultured pearls 225 Mother-of-pearl 230 231 DIAMOND PRODUCTION 232 STONES AS SYMBOLS...an1ber, garnet, jade, jasper, coral, lapis lazuli, pearl, serpentine, emerald aod turquoise. These stones |  | | Journal (issue) | | (lithium tourmaline) was made at the Dunton gem mine, Newry, Maine, U.S.A. The narrative of discovery...England "watermelon" tourmaline had come from this mine in years gone by, although most of it was not facet-grade...after two years of semi-continuous operation of the mine. T h e elbaite is being mined from collapsed gem...the courtesy of M r Dean McCrillis, of Plumbago Mining Corporation, Rumford, Maine, the author was permitted...McCrillis and M r J o h n Marshall, of Plumbago Mining Corporation, for their invaluable 367 assistance |  | | Book (edition) | | Physical Properties and Characteristics Finding, Mining, and Cutting $24.95/Can. $31.95 ould you know...Production © of Gemstones 62 Types of Deposits 64 Mining Methods 68 Cutting and Polishing of Gems 69 Engraving... Classification 84 — - ae : 126 Tourmaline Group 130 Spodumene 166 Opal Species 170 Jade _ Species...192 Malachite Agate 148 Ti 176 180 Feldspar Group Chrysoprase Precious Beryl 112 Anyolite 178...158 Jasper 162 ee Petrified Wood 120 Garnet Group 164 124 Zircon - 194 Lesser-Known Gemstones Andalusite |  | | Book (edition) | | Corporate Drive, Suite 400, Burlington MA 01803, USA First published 1962 Second edition 1970 Third edition...Chrysoberyl Spinel Topaz Tourmaline The Garnets Feldspar Group Zircon Peridot 69 92 117 150 167 171 175 185 195...book would be more sensibly shared out among a group of authors/gemmologists, each member tackling his...Canada, Germany, Thailand, Vietnam, the UK and the USA, making this a truly international collaboration...Edition being extracted from ‘Gems of the Silica Group’ to form a separate chapter. I have also reintroduced |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...59, 5 mi. E of Jackson-Banks Co. lineBeryl. MAYSVILLE, area gravels along adjoining Co. linerock crystal...crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside the Co. line in a Hornblendegneiss...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE: |  | | Journal (article/letter/editorial) | | Two Point claim, Pikes Peak batholith, Teller County. The Collector’s Edge specimen, Jeff Scovil photo...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...prohibitions on collecting or to private land or mining claims for which permission has been obtained....been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951, 1958, 1965, 1972). Though |  | | Report (volume) | | Browns Canyon Wilderness Study Area, Chaffee County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1716-C DEFINITION...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...Chaffee County, Colorado. (Mineral resources of wilderness study areas South-Central Colorado; ch. C)...Mines and mineral resources Colorado Browns Canyon Wilderness. 2. Geology Colorado Browns Canyon Wilderness |  | | Journal (article/letter/editorial) | | and much used in industry, is found in De Kalb County, 4 miles northwest of Fort Payne, Ala. There a...Another deposit is reported as being in Clarke County-" ARIZONA—Earl Mayer, 1753 " I " St, Yuma, Ariz...might now add, that Clinton is the county seat of Van Buren county. As stated, this bridge is in the wilds...wide. On top this bridge, it is so flat that a wagon or car could go across it. This flat top is eighteen...it was not more available to the public. With the big road machinery they have today, a good road could |  | | Journal (issue) | | Riley A. J. French F. InsLP., F.G.S. A. W. R. Round A. C. Hilbourne W. Nowak, C.Eng. C. H. Winter S...North-West Branch: L Knight, F.G.A. South Yorkshire & District Branch: L R. M. Lewis, F.G.A. Examiners: B. W...o . 4 OCTOBER 1982 GEM QUALITY GAHNITE FROM NIGERIA By BRIAN JACKSON, F.G.A. Department of Geology, Royal...reasonably common, gahnospinels comparatively rare and gahnite (zinc spinels) of gem quality even rarer. It was...blue-green, gem-quality octahedral crystals of gahnite, of cuttable size (maximum size approximately 1 | | | Book (volume) | | vacation stops at a roadside “dig your own” gem mine. Junior finds a sapphire the size of a peach and...) Many an unsuspecting tourist has stopped at a mine to try his or her luck and become a rockhound for...Alaska Idaho Southwest States Arizona California Colorado Hawaii Kansas Nevada New Mexico Oklahoma ‘Texas...VOLUME 4: Northeast States Connecticut Delaware District of Columbia Illinois Indiana Maine Maryland Massachusetts...GUIDES TO THE U.S.A. Where & How to Dig, Pan, and Mine Your Own Gems & Minerals VOLUME 4: NORTHEAST STATES |  | | Book (volume) | | vacation stops at a roadside “dig your own” gem mine. Junior finds a sapphire the size of a peach and...) Many an unsuspecting tourist has stopped at a mine to try his or her luck and become a rockhound for...States VOLUME 2 Alaska Idaho Arizona California Colorado lowa Minnesota Montana Hawaii Kansas Nebraska...VOLUME 4 Northeast States Connecticut Delaware District of Columbia Illinois Indiana Louisiana Maine...U.S.A. 4TH EDITION Where & How to Dig, Pan, and Mine Your Own Gems & Minerals VOLUME 2: SOUTHWEST STATES |  | | Book | | 1899-1900, pp. 256-263, and in the New Zealand Mining Handbook, 1906, pp. 500-519. " 1909. Additions...Reports : Papers and Reports relating to Minerals and Mining the annual report of the New Zealand Mines Department... ; ; many ; other localities. Algodonite (Copper Arsenide) Allanite (Orthite : Whangapirau (Skey...(Skey, Lab. var. of Epidote) : Westport 31). district, in diorite (G.S. 1913) Parapara (Thomson, Trans...silky form of Asbestos) : A common : Arrow district (Skey, Lab. 31). constituent of igneous rocks |  | | Journal (issue) | | Mines DaylightFluorescent Hyalite from Namibia Gahnite from Nigeria Volume 38 / No. 2 / 2022 COLUMNS...Kumar Vijay 183 On the Colour Mechanism of Blue Gahnite from Nigeria 173 Photo courtesy of The Walters...Cambridge, Massachusetts, USA Edward Boehm RareSource, Chattanooga, Tennessee, USA Maggie Campbell Pedersen...Emmett Crystal Chemistry, Brush Prairie, Washington, USA Emmanuel Fritsch University of Nantes, France Alan...Sevdermish Gemewizard Ltd, Ramat Gan, Israel Brian Jackson National Museums Scotland, Edinburgh Mary L. Johnson |  | | 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...Collecting in Colorado The Collections: Mel & Pam Bersch Ryan Bowling Ralph Clark Colorado School of Mines...Richard Jackson & Safaa Yu Dan & Dianne Kile Brian Kosnar Bryan & Kathryn Lees Ian Merkel Mining Hall of |  | | Journal (article/letter/editorial) | | search for other minerals, or in the commercial mining of these, such as gold, corundum, mica, and monazite...westernPiedmont section of the state, and in Franklin County on the eastern edge of the Piedmont. They have...localities. Three diamonds have been found in Burke County, two of which were from near the "Ford of Brindletown...diamond is now in the State Museum. The Cleveland County diamond was found in 1893 near Kings Mountain,...weighing approximately f of a carat. The Lincoln County diamond was found.near Cottage Home by Dr. C. L |  | | Book | | gems Native minerals Gold Silver Diamond Copper Mighty mine Sulfides Pyrite Ore minerals Oxides Ice Under...Sulfate minerals Gypsum Cave of Crystals Phosphate group minerals Silicates Topaz Jade Jasper falls Ruby...pressures underground. Devil's Tower, Wyoming, USA. A rock that cooled within a volcanic vent and that...e--_ Quartz The Grand Canyon, Arizona, USA. The Colorado River has cut a 1.6-km-(1-mile-) deep canyon...crystal of plagioc/ase feldspar Mount Rushmore, USA buttresses after the cover of country rock has eroded |  | | Book (edition) | | vacation stops at a roadside “dig your own” gem mine. Junior finds a sapphire the size of a peach and...) Many an unsuspecting tourist has stopped at a mine to try his or her luck and become a rockhound for...Southwest States California lowa Minnesota Montana Colorado Nebraska North Dakota Oregon South Dakota Washington...Connecticut Arkansas Florida Georgia Kentucky Delaware District of Columbia Illinois Indiana Louisiana Maine...U.S.A. ATH EDITION Where & How to Dig, Pan, and Mine Your Own Gems & Minerals VOLUME 3: SOUTHEAST STATES |
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