 | | Journal (issue) | | ................ 383 OPALIZED WOOD OF MESA COUNTY, COLORADO. BJ' UV. C. l\1inor ......................Zo:!ac .............. IMPORTANT FOSSIL FINDS IN COLORADO ................................ 381 386 388...vicinity of Thomsonite Beach near Grand M arais, Cook County. (See inset key map) Thanks to the recent relocating...ht. Upper Gault Sand (Lower Cretaceous) Hardown Hill, Dorset, England. T he sands are so full of deri11ed...in the southwestern part of Albany County (close to the Colorado border) which in tu~n is in the southeastern |  | | 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) | | 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...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Report (volume) | | and sapphire are considered precious gems. Some opal is precious, but most varieties are semiprecious...streams, and eventually deposited as alluvial gravels. Opal and agate are formed from aqueous solutions. Diamonds...Del Norte County; Trinity River, Trinity County; Spanish Creek and Gopher Hill, Plumas County; Placerville...and Webber Hill, El Dorado County; Cherokee Flats, Yankee Hill,and Oroville, Butte County; French Corral...Corral, Nevada County; Indian Gulch and Volcano, Amador County; and Alpine Creek, Tulare County. Other western |  | | Book (volume) | | SOUTHWESTERN QUADRANT Arizona, Arkansas, California, Colorado, Louisiana, Nevada, New Mexico, Oklahoma, Texas...Search of a Whale Wild Season Incident at Hawkās Hill Wilderness Empire Johnny Logan The Wilderness...Southwestern Quadrant Arizoni, Arkansas, California, Colorado, Louisicna, Nevada, New Mexico, Oklahoma, Texas...Location Numbers Arizona Arkansas California Colorado 258 Louis B30 ana HOW TO USE THIS BOOK...volumes, through very precise directions and accurate county maps, to get you to the best and most accessible |  | | Book (edition) | | rockhounding for eight years* We have followed maps up hill and down dale to free spots to dig. We have also...under 100 lbs., 400/lb. over 100 lbs. Black Mountain Opal Mine. Write Lander's Turquoise, 321 East Andy Devine...rockhound ranch. $5-00/yr. dues- Petrified wood Fire opal Fire agate, desert roses Flower agate, snowflake...camping; no hook-ups; bring water**Karl Kubik, Iowa Hill, CA (near Colfax). Fee: $3*00/20 lbs- + 25^ each...$3-00 each unguided. Under 12 yrs. old free. Opal Hill Mine, Helen Madden, Box 232, Palo Verde, CA 92266 |  | | Book (volume) | | 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...Cantlin, Ellis, [D; Jeannette B. Carillo, Gem Center USA, EI Paso, TX; Gary Christopher, The Prospectors Cache...James D. Lindberg, Las Cruces, NM; Jack Lowell, Colorado Gem & Mineral Co., Tempe, AZ; Steven & Lorna Lukinuk...Resources, Vancouver, BC; Barbara L. Muntyan, Ouray County Historical Society, Ouray, CO; Merrill O. Murphy |  | | Book | | famous was the single beryl stone found in Oxford County in Maine that weighed 18 tons and was 18 feet in...with its porous structure has a distinctive look. Opal in its most elegant form is a semitransparent stone...Sapphires and rubies are found in North Carolina, Colorado, Idaho, Indiana, CalĀ¬ ifornia and Montana, but...yellow and red stones. Beryl occurs in California, Colorado, Connecticut, Georgia, Idaho, Maine, Maryland...cabochon of unique color. The Pikes Peak area in Colorado is the best-known collecting area. Sunstone has |  | Swayze, G. A., Clark, R. N., Goetz, A. F. H., Livo, K. E., Breit, G. N., Kruse, F. A., Sutley, S. J., Snee, L. W., Lowers, H. A., Post, J. L., Stoffregen, R. E., Ashley, R. P. (2014) Mapping Advanced Argillic Alteration at Cuprite, Nevada, Using Imaging Spectroscopy. Economic Geology, 109 (5) 1179-1221 doi:10.2113/econgeo.109.5.1179 | Journal (article/letter/editorial) | | Denver Federal Center, Denver, Colorado 80225 2 University 3 of Colorado, Department of Geological Sciences...Sciences, Emeritas, Boulder, Colorado 80309 Physics Department and Remote Sensing Center, Naval Postgraduate...hydrothermal alteration. Partial lichen cover on opal spectrally mimics chalcedony, limiting its detection...Buddingtonite Bump Pediment Basalt 1181 Eastern Center Opal Hill Stonewall Playa Dickite Ridge Syenomonzonite...dike Spearhead Tuff hogbacks Kaolinite Hill Alunite Hill Stonewall Mountain alluvial fan 95 Lida | | | 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...Cantlin, Ellis, ID; Jeannette B. Carillo, Gen1 Center USA, El Paso, TX; Gary Christopher, The Prospectors Cache...James D. Lindberg, Las Cruces, NM; Jack Lowell, Colorado Ge1n & Mineral Co., Tempe, AZ; Steven & Lorna...Resources, Vancouver, BC; Barbara L. Muntyan, Ouray County Historical Society, Ouray, CO; Merrill 0. Murphy |  | | Book (volume) | | El Paso, Texas. Information on the Virgin Valley opal deposits was given by G. Keith Hodson of Scottsdale...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...Ramona, and Ralph R. Potter of the Himalaya Mine at Mesa Grande provided every courtesy in respect to personal...Diamond, Corundum (Ruby and Sapphire), Beryl, Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene |  | | Book (edition) | | MARIN COUNTY FREE LIBRARY 3 1111 00289 4184 \ I s Fifth Revised Edition A complete, state-by-state...Maryland; Professor Richard Pearl of Colorado Springs, Colorado; and Professor Jack Hanahan of Belmont...North Carolina, a big diamond or two in Arkansas, opal in Idaho, and so on. Old locations suddenly are...eye of the microscope. A few gem materials notably opal and obsidian are amorphous, lacking crystal structure...with light such as creates the unique beauty of opal or labradorite, the starry splendor of star sapphire |  | | Journal (article/letter/editorial) | | C a m p Bird Mine R o a d P.O. Box 586 Ouray, Colorado 81427 Downloaded by [University of Florida] at...minerals in Colorado for the past twenty years. Microminerals at ROCK ISLAND DAM DOUGLAS COUNTY WASHINGTON...include offretite, erionite, pyrite, phillipsite, opal, clinoptilolite, K-feldspar, gypsum, chabaĀ zite...modifications. The Rock Island Dam is located in Douglas County on the Columbia River about 12 miles southeast...gypsum has reĀ cently been found on clinoptilolite. Opal occurs on erionite and phillipsite or alone as globules |  | | Journal (article/letter/editorial) | | and had my first chance at the minerals in the Colorado Desert of California and Arizona. By a lucky chance...'Arizona Gem Fields'. Near Indian Pass, Imperial County, Calif., and then deep in the Muggins Mountains...inch in size. COLORADO ā "Stibnite has been found in xled form in at least two Colorado mines. "In the...), no fl. (s.w.). Wesrville is in So. Vermilion County of Eastern Illinois. INDIANAā"From a little stream...brown by iron. Covington is in Western Fountain County in Western Indiana. I O W A ā " W e enclose for |  | | Journal (issue) | | For Your Supply of write to: Mintabie Black Opal Company P.O. Box 243-DG Epping 2121 Australia We...state by W.G. Masoner CLEANING UP AT SOAPSTONE HILL A collecting location near the CFMS show site by...S111rley Leeson. Second Vice-President 6155 Haas St. La Mesa. CA 92041 Margaret Norton, Secretary 276 Belblossom...COVER ... I -- Pictured on our cover are a magni- County, California; Baja California and ficent faceted...had a set of benitoite jewelry designed Benito County, California. For years and made by William McDonald |  | | Journal (issue) | | Coral. An,,..1 or Salmon fOrientl Opal Mosaic Ooal Tri1llets Opal (White) fiery Peridot Pink Shell t...Depending upon yield - 30 to 50% from our rough opal - and your market, profits should not be less than...cutting opal for profit, and WISH TO START YOUR OWN BUSINESS ask for our leaflet on how to cut opal more...NORTH PARRAMATTA 2151, AUSTRALIA I SEND ROUGH OPAL TO THE VALUE OF ------------------------------ $...Leeson, Second Vice-President 6155 Haas St.. La Mesa, CA 92041 Margaret Norton. Secretary 276 Belblossom |  | | Journal (issue) | | "' 10 AM Ā· 5 PM ASCADf OF GEMS ; . MULTONOMAH COUNTY EXPOSITION CENTER 2060 N. Marine Drive, Portland...Pacific Tool Co Dormaier Biggs Jasper Down Under Opal Ennis Rock House Gabnel Gem & Lapidary Supply -Wholesale...Rocks & Minerals Shergem Simon Golub & Sons Spencer Opal Mines The Owl & Turtle Rockldary The Randalls The...Mountings Metal Detectors ā¢ MOST ITEMS POSTPAID TO USA DESTINATIONS e 100% SATISFACTION GUARANTEE - Each...(602) 825-9115 or 7Ql-2210. * TIBARA OPAL ā¢GENERAL CATEGORY OPAL HOT 101Ā· 103 Coober Pedy practice grades |  | | Journal (issue) | | Green Moss Aaate; Red Malachite Mex. Cra7V Lace Opal Mosaic Ooal Triplets Ooal (White) FiefV Rubv Pink...Leeson. Second v,ce-President 6155 Haas St.. La Mesa. CA 92041 Margaret Norton, Secretary 276 Belblossom...Portland, OR 97216 Mrs. Toby Cozens. Treasurer 4401 SW Hill SI., Seattle, WA 98118 SOUTH CENTRAL FEDERATION...ā¢ 70 SpedmeM Purpurlte Roae Oueru Pett1fi.d Wood Opal Lapidohta (Yaflowl Chalk Nepllnta Amazonite Pailomellne...CALIFORNIA CUSTOMERS: Pleue add 6~ 70 8,-c:IHemiMOfl)hill Gamel - Ill Topaz - xi Stdbtll Chlonta Phyl1te Huahydntā¢ |  | | Book | | copper are in the Keweenaw Peninsular, Lake Superior, USA, the largest being I 5 x 7 x 3m (approx. 50 x 23...occurred in the Ray mine and in Bisbee, Arizona, USA. Very fine spinel-law twins up to 5 cm in size and...Keweenaw Peninsula near Lake Superior, Michigan, USA. Wires, up to 100 mm (4 in) long, come also from...fine gold wires come from Farncomb Hill near Breckenridge, Colorado, USA. Fine crystals were also found in...were found in Klondike, Alaska; Tuolumne County, California, USA and in Ballarat, Victoria, Australia. Fine |  | | Journal (issue) | | .......... $1 .00 per lb. Opal. Mexico, black plumes In salmon color opal..............................- ALL ORDEAi MUST INCLUDE A S.2.00 ,_ II In the USA - all others including Canada must Include lull amount...(412) 547-6779 New Finds A. Gold Base Gem Crystal Opal \\'ith red, blue, orange & green colour patterns...specialize in_C1:m Quality Crystal opal. \Ve hav~ been mining and ~e~ling in opal for _8 years. Inā¢ tegrity and...central Minnesota on Route 94), the county seat of Douglas County. There, 12 Ā½ miles from the place where |  | | Book | | varieties, with favorite location of quartz agate, opal wood ā collectors. The petrified gems throughout... tell about other quartz varieties such as the opal, and petrified wood; and to give him the most complete...Other Quartz Chapter 5. Opal and Its 25 30 50 Varieties Glossary of Opal Terms 54 Wood 62 Chapter... ehrysoprase, tigereye, and common and precious opal. In the general opinion of most collectors, chalcedony...Lapidary Society to organize groups in Los Angeles County. these early associations Agate and Mineral Society |  | | Book | | HfiRIN COUNTY FREE LIBRfiRY 311110G386652Q I V Russell P MacFal A COLOR TREASUF FOR COLLECTORS...to Hunting Locations ? i 9 GIVEN TO THE MARIN COUNTY LIBRARY BY MARI N L MTNF.RAT. SOCTETY DAVID...Center. Geological Survey. Federal Center. Denver. Colorado 80225. Index sheets from which the condition...may be able to buy specimens. map of Keweenaw County. Mich- Part of the U.S. Geological Survey topographic...excavations hidden by the gold seekers at Leadville. Colorado, discarded were that usually there is made |  | | Book | | copper are in the Keweenaw Peninsular. Lake Superior, USA, the largest being 15 x 7 x 3m (approx. 50 x 23 x...occurred in the Ray mine and in Bisbce, Arizona, USA. Very fine spincl-law twins up to 5 cm in size and...Keweenaw Peninsula near Lake Superior, Michigan, USA. Wires, up to 100 mm (4 in) long, come also from...many localities in California, USA (Colorado Quartz mine. Nigger Hill and others). Fine leaf gold comes...were very rare in Ground Hog mine, Gilman, Colorado, USA. The largest known sheets of crystallized gold | | | Book | | Center Geological Survey Federal Center Denver Colorado 80225 Index sheets from wh ich the precise maps...topographic map of the Delaware q uadrangle o f Keweenaw County, Michigan This ,s an example o f the more picturesque...gray lumps that the gold seekers at Leadv1lle, Colorado, discarded were later recognized as the ore that...as obs1d1an found with other volcanic eiecta and opal M inerals are classified according to their structure...Oregon are nodules of agate o ft en associated with opal Reniform marcas1te 5 inches 1n diameter, with crystals |  | | 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 |
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