 | | Journal (article/letter/editorial) | | CUNNINGI-IAM, JR. Abstract The Jamestowndistrict, Boulder County, Colorado,is a major producerof fluorspar; prior...telluride veins. TaE Jamestowndistrict is in Boulder County, Becauseof the many similaritiesof the Tertiary...105o22'$0" COLORADO ..' BUB/..INGTON .." 'as MINE ,' .. -... ../•..a..•, ...... ß ß oO ,- ...fluorite production has beenfrom two adjacentmines,the Emmett and the Burlington (Fig. 1). Both of these deposits...with further heating,liquid fills the inclusions. Hematite and birefringentdaughter mineralsdid not dissolve |  | | Journal (issue) | | Aventurescent oligoclase feldspar from Oregon, USA Dr Ulrich Henn German Gemmological Association, Idar-Oberstein...oligoclase feldspars from Oregon, USA are described. They contain euhedral hematite inclusions, which cause aventurescence...aventurescence, chemical composition, gemmological hematite inclusions, oligoclase feldspar, Oregon properties...discovered in basaltic rocks in the state of Oregon, USA, in the 1960s by local mineral collectors. The main...Plush in Lake County (Pough, 1983). A second locality has been found in Harney County. Small scale mining |  | | Journal (article/letter/editorial) | | of Western Grove,in the N.E. section of Newton County. All these are in N . W . Arkansas. "It happened...and interesting one from Lawrence County, Arkansas." CALIFORNIA—Emmett Klopfenstein, Box 162, Greenville...pinkish rhodonite have been found in the Sunnyside mine at Silverton (San Juan Co.), Colo. CONNECTICUT—Richard..., sent us two items (one on the old lead-silver mine at Canton (Hartford Co.), Conn, and the other on...Reid, collected at the old Canton silver and lead mine. I recently visited the locality, for the first |  | | Journal (article/letter/editorial) | | FRESHWATER FERROMANGANESE NODULES FROM GREEN BAY, LAKE MICHIGAN S E UN G Y EO L L E E AN D H U IF A NG X U *...ferromanganese nodules (FFN) from Green Bay, Lake Michigan have been investigated by X-ray powder diffraction...reddish feldspar containing phyllosilicates and hematite micro-crystals. Other cores consist of goethite...goethite, cristobalite, tridymite, hercynite, hematite-bearing quartz, coal, and chlorite-bearing rock fragments...The hexagonal or hexagonal-like structures of hematite microcrystals and clay minerals in the cores may |  | | Journal (issue) | | KRISTALLE Est.1971 Laguna Beach, California, USA • Tel: +1 949 494 5155 • Email: info@kristalle.com...the Dragon Gold Specimen, Colorado Quartz mine, Mariposa County, California........................463 by...cjstefanoxls@gmail.com Hauerite from the Destricella mine Circulation Manager & Staff Photographer Christi...Dragon”), 22.9 cm, from the Colorado Quartz mine, Mariposa County, California. Collector’s Edge specimen (now...only): $139/one year (Canada) $231/one year, (outside USA other than Canada) $325 for one year Subscription |  | | Journal (article/letter/editorial) | | understanding of the iron oxide substrate (goethite, hematite and magnetite) mineralogy and the fate of arsenic...that the iron oxide minerals were predominantly hematite, magnetite and goethite with goethite containing...by magnetite (Feng et al., 2012) and 95 mg/g by hematite (Prucek et al., 2013) have been reported in the...different types of iron oxide minerals (goethite, hematite and magnetite) were 43 GMJ Vol. 20, No.2, Dec...investigations. The iron oxide minerals: goethite, hematite and magnetite were obtained from Wards natural |  | | Catalog/List | | Gemstone: Cuprite - 50.58 Cts. Ogonja Mine (Onganja Mine; Emke Mine; Emka; Otjisongati) Ogonja (Onganja)...Gemstone: Cuprite - 84.47 Cts. Ogonja Mine (Onganja Mine; Emke Mine; Emka; Otjisongati) Ogonja (Onganja)...11.94 Cts. Sweet Home Mine Mount Bross, Alma District, Park Co. Colorado, USA This adorable pink-red...iconic locality for the variety: the Sweet Home Mine in Colorado. This beautiful material is recognized...Rubellite Tourmaline - 20.88 Cts. Morro Redondo mine Coronel Murta, Minas Gerais Brazil This sizeable |  | | Journal (article/letter/editorial) | | University of California at Davis, Davis, CA 95616, USA AbstractÐHigh-temperature oxide-melt solution calorimetry...transform infrared spectroscopy, the Brunauer, Emmett and Teller method and thermogravimetric analysis...calorimetric data using enthalpies of formation of hematite and liquid water as reference phases for high-temperature...clarifies previous inconsistencies between goethite-hematite equilibrium thermodynamics and observations in...enthalpy of dissolution for variable sized samples of hematite and goethite, discussing the energetics of the |  | | Journal (article/letter/editorial) | | Photographs January/February: Chalcopyrite on quartz, La Mine de Giraud, La Gardette, Bourg d’Oisan, Isère, France...Herkimer Diamond Mines, Inc., New port, Herkimer County, New York. Jeffrey B. Fast specimen and photo....cleavelandite, 49er Pocket, Oceanview mine, Pala district, San Diego County, California. Bill Larson specimen...photo. September/October: Gold, Mockingbird mine, Mariposa County, California. Collector’s Edge Minerals,...Treasure Chest Pocket, Jacksons Crossroads, Wilkes County, Georgia. Lisa Bennett specimen, Jeff Scovil photo |  | | Journal (issue) | | Industry Background image: Miners at the Pala Chief Mine, San Diego Country, California, circa 1903. On the...They are Found zite (201 cts) is from the Oceanview Mine in Southern California; the 0.72-ct benitoite (left...Dallas Gem Mine area, San America’s Royal Gems – Montana and Yogo Sapphires Benito County, California;... State of Maine phires is from the Gem Mountain Mine, GranTantalizing Turquoise ite Country, Montana...Rare and Beautiful American Gemstone and original mine image by Mark Mauthner. Red Beryl – A Very Rare |  | | Journal (issue) | | Beryllium Diffusion of Ruby and Sapphire John L. Emmett, Kenneth Scarratt, Shane F. McClure, Thomas Moses...California Kenneth Scarratt New York, New York John Emmett Brush Prairie, Washington Anthony R. Kampf Los...In the lead article in this issue, Dr. John L. Emmett and co-authors present the results of a major study... BERYLLIUM DIFFUSION OF RUBY AND SAPPHIRE John L. Emmett, Kenneth Scarratt, Shane F. McClure, Thomas Moses...diffusion was not recognized until much later (Emmett and Douthit, 1993). Eventually, tons of previously |  | | Report (volume) | | Mathews, Johns Hopkins University, Baltimore. Michigan..........Mr. R. A. Smith, Lansing. Dr. A. C. Lane...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | | Journal (article/letter/editorial) | | (1996) © Meteoritical Society, J996. Printed in USA. The study of weathering products of meteorites...weathering of ordinary chondrites from Roosevelt County (western United States) and from the Sahara (Daraj...by evolved gas analysis recovered from Roosevelt County and Daraj for which terrestrial ages have been...Goethite Lepidocrocite Ferrihydrite Akaganeite Hematite Maghemite Magnetite Jarosite Green rusts Reevesite...known), hematite (St. Gotthard, Switzerland), jarosite/goethite (Utah, USA), jarosite (Colorado, USA). AdditionallY3 |  | | 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...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...CARTERSVILLE: area barite pitsBarite, Geodes, Goethite, Hematite, Limonite, Iron minerals; area mines, as important |  | | Report (issue) | | DIRECTOR THE MENOMINEE IRON-BEARING DISTRICT OF MICHIGAN BY WILLIAM SHIRLEY BAYLEY CHARLES RICHARD VAN...407 Traders mine 407 Cornell mine 410 Cuff mine 410 Indiana mine 4j Forest mine 412 The southern...Chapin-Pewabic deposits 414 Walpole mine Pewabic mine 414 Chapin mine 420 418 — CONTENTS. 10 Chapter...southern Other belt Old Keel Ridge mine 423 Keel Ridge mine 424 Quinnesec, Cundy, and Vivian mines... 428 Aragon mine Mines east of Aragon mine Brier Hill and Curry mines West Vulcan mine Central Vulcan |  | Verron, Héloïse, Sterpenich, Jérôme, Bonnet, Julien, Bourdelle, Franck, Mosser-Ruck, Régine, Lorgeoux, Catherine, Randi, Aurélien, Michau, Nicolas (2019) Experimental Study of Pyrite Oxidation at 100 °C: Implications for Deep Geological Radwaste Repository in Claystone. Minerals, 9 (7) 427 doi:10.3390/min9070427 | Journal (article/letter/editorial) | | Although thermodynamic modelling expects that hematite is the most stable phase in a pure pyrite heated...[4] and leads to environmental issues due to acid mine drainage [5,6]. For these reasons, alteration and... Minerals 2019, 9, 427 4 of 16 from the Elmwood mine (Tennessee). Euhedral crystals of calcite were collected...surface area was measured with the BET (Brunauer, Emmett to the the adsorption/desorption adsorption/desorption...isotherm isotherm of of N N2 at 77 K [19]. The Emmett and and Teller) Teller) method method according |  | | Journal (issue) | | Lucerne, Switzerland Hamburg, Germany John L. Emmett Simon Lawson Nicholas Sturman Brush Prairie...diamond on the cover was sourced from Canada’s Diavik mine in October 2018. Weighing a remarkable 552.7 ct...Mouawad Campus 5345 Armada Drive Carlsbad, CA 92008 USA © 2022 Gemological Institute of America All rights...historically sourced from gem materials. Covering hematite, azurite, malachite, lapis lazuli, bone, ivory...ct type IIa rough diamond recovered at the Lulo mine in Angola in 2016. The main stone fashioned from |  | | Journal (issue) | | 18 East 48th Street, Suite 502 New York, NY 10017 USA Tel: 212.620.0900, Fax: 212.352.9054 www.gemstone...Muhamad Asraf Sultan DIRECTORS Edward W. Boehm, USA Terrence Coldham, Australia Nobuyuki Horiuchi, Japan...ethical concepts all along the supply chain, from mine to market. For the moment, only a small number of...operate in the future. The remediation of existing mine sites represents a significant opportunity.” Images...Dangerous for humans and cattle. slope failures, mine collapse. Livelihood source (agriculture) disappears |  | | Journal (article/letter/editorial) | | increasing FeCl2 concentration and the Brunauer–Emmett–Teller speciWc surface area of ferrihydrite-modiWed...of Si-containing ferrihydrite to crystallized hematite might occur when ferrihydrite-modiWed diatomite...transforms to more crystalline phases such as hematite and goethite (Cornell and Schwertmann 1996; Jambor...Eagle Picher Filtration & Minerals Inc, Nevada, USA. FN6 is composed of 89.2% SiO2, 4% Al2O3, 1.5% Fe2O3...according to their chi-square values. Brunauer–Emmett–Teller (BET) analysis Textural parameters of ferrihydrite-modiWed |  | Shoppert, Andrei, Loginova, Irina, Rogozhnikov, Denis, Karimov, Kirill, Chaikin, Leonid (2019) Increased As Adsorption on Maghemite-Containing Red Mud Prepared by the Alkali Fusion-Leaching Method. Minerals, 9 (1) 60 doi:10.3390/min9010060 | Journal (article/letter/editorial) | | vibrating sample magnetometry (VSM), and the Brunauer–Emmett–Teller (BET) method. The main iron-containing phase...7407). A gas adsorption analyzer with the Brunauer–Emmett –Teller (BET) method (Gemini VII 2390 Surface Area...determined by a Diamond TG/DTA (PerkinElmer, Waltham, MA, USA), by heating a sample from 50 to 1000 ◦ C at a rate...this bauxite mainly consisted of boehmite and hematite, with small amounts of rutile, diaspore, calcite...boehmite; h, hematite; gibbsite; d, diaspore; ca, calcite; r, rutile; ch, chamosite. hematite; g, gibbsite; |  | | Journal (article/letter/editorial) | | SOFT OF OXIDATION IRON ORES OF VIRGIL TO THE MICHIGAN. ORIGIN 4 OF I. MANN. CONTENTS. PAGE Introduction...nlyfrom the town of Wakefield east of the Vicar mine; however this section includes the area considered...that the Negauneeand Ironwoodiron formationsof Michigan havebeenalteredand oxidizedto soft oresby solutionswhichwere...ores on INDEX MAP OF UPPER MICHIGAN •AKESUPERIO• WISCONSIN •///f MICHIGAN FIG. 1. this rangewere guidedby...siliceous bandsof the formerare staineda bright red by hematite,and the bandsof ore betweenthem are mainly specularhematite |  | | Journal (article/letter/editorial) | | carbon dioxide sorption at 196 K on goethite, hematite and gibbsite than from nitrogen, argon and krypton...divided and porous materials is that of Brunauer, Emmett and Teller (1938), the BET method. A number of...vapor adsorption methods were first developed, Emmett and Brunauer (1937) advocated the use of nitrogen...Gas sorption in clay mineral systems To prepare hematite 100 g of ferric nitrate was placed in 400 ml of...volumetric equipment based on that described by Emmett and Brunauer (1934) and including many of the refinements |  | | Report (issue) | | Radium lode-was first found in the South Terras mine in 1873 (Robertson and Dines, 1929, p. 147). Penrose...of ore was sold up to 1907 from the South Terra.s mine and that about 576 tons of uranium ores was produced...also was known to occur in the Leyden Coal mine~ Jefferson County, Colo., as early as 1875 (Berthoud, 1875...in the conterminous United States is to the Rajah mine, known earlier as the Copper Prince ( Briiyn, 1955...19p6) stated that "The initial shipment from the mine, made in 1898, • • • the South Terras property near |  | Perera-Solis, Diego D., Pimlott, Matilda, Fidment, Ella, Whiting, Andrew, Greenwell, Hugh Christopher (2019) Adding Value to Waste Minerals in a Circular Economy Framework: Ochre-Derived Layered Double Hydroxide Catalysts in Fatty Acid Ketonisation. Minerals, 9 (11) 681 doi:10.3390/min9110681 | Journal (article/letter/editorial) | | the co-precipitation method from a dissolved acid mine drainage precipitate waste “ochre”, which is normally...acid-soluble waste product sludge precipitated from acid mine drainage (AMD) treatment named ochre, which would...synthesize Mg/Fe LDHs. In this paper, the use of the acid mine drainage precipitate ochre is investigated as a...Cleveland, UK; a treatment system for an ironstone mine. Previous work has shown that the Saltburn ochre...Ultima 2 ICP-OES (HORIBA Scientific, Piscataway, NJ, USA), fitted with a sequential monochromator and a radial |  | | Report (volume) | | :............................................. Michigan.................................................See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities : Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20 S., R. 7 E.;...; Jefferson County, at Ely ton; Lee County, at Chewacla lime works"; St. Clair County, at Greensport; |
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