 | | Journal (issue) | | 3A mold is defined by its matrix. Carolina). Chalcedony after interstices from Chester County, Pa., has...Fremontite. Canion City, Colorado Delafossite after Copper (?). Bisbee, Arizona Chalcocite after Sphalerite...through: (a) the loss of a constituent-e.g., native copper 396 Bulletin American Museum of Natural History...adsorbent. (Quartz after calcite type; also quartz or chalcedony after barite, celestite, dolomite, fluorite,...) The very common pseudomorphs of quartz and chalcedony after calcite are apparently to be correlated |  | | Journal (article/letter/editorial) | | vari- 3 eties. In the Joplin lead and zinc district of southwest Missouri the minerals crystallizing...following sequence: dolomite, galena, sphalerite, chalcedony, marcasite, and calcite. In veins, quartz is...covellite (copper sulfide) by heating powdered sphalerite (zinc sulfide) in a water solution of copper sulfate...blueblack powder (covellite) appears. In the Joplin district covellite after sphalerite has been found, so...naturally are the minerals which have been formed on .mine-tools, prehistoric implements, old coins and other |  | | Journal (issue) | | MINERAL OBSERVER ) 17 7 • 9 't( C S 1 7 /IC • Copper.13 cm.HoughtonCounty,Michigan,USA.Jeff Scovil photo...Saxon minerals in the Terra Mineralia Museum (Germany). A group of Italian mineralogists presents a new...Stefano Dallabona, Ivano Rocchetti Fiemmeite: a New Copper Oxalate from San Lugano (Trentino, Dolomites, Italy)...crystals. 31 x 28 cm. Urals, Russia. GM KFU#6008. 13. Copper. 7.5 x 7.5 cm. Turyinsky mines, Northern Urals...Fluorite (with old labels). 7 x 5 cm. Schwarzwald, Germany. GM KFU #7461. 15-16. (on page 10). 15. Set of |  | | Journal (issue) | | elsewhere. It is worth mentioning the outstanding chalcedony and agate specimens from the vicinities of the...Z. Kantor (leftmost) with miners at the Lukhumi Mine, Gornaya Racha, Georgia, 1975. Photo: Leo V. Bulgak...54--59. 39. Quartz Twins by Japan Law and Native Copper// Mineral Observer. Mineralogical Almanac, 2018...crystals on the pyrite crystals. 8.5 vtide. Casapalca Mine, Peru. 18 C rystallized minerals are wonderful... 13 13. Oriented overgrowing of quartz over chalcedony {Laemmlein, 1973). •'' '' I • • ! ' \ •••• |  | | Book | | retain their inner crystalline structure, e.g. chalcedony. All minerals are solid with one exception:...however, are composed of a single element, such as copper, gold, sulphur, or carbon. The latter is better...they often become filled with quartz, agate or chalcedony. The largest part of the gases and vapour escapes...damaged by the finger nail. A piece of 19 copper wire or a copper coin (hardness approx. 3) scratches minerals...a piece of copper in one hand, and a piece of amber in the other, we can feel that copper is colder. |  | | Journal (article/letter/editorial) | | been a particular love. A galena from Neudorf, Germany, for example, gets my heart beating a smidge faster...aragonite on calcite, 10.3 cm across, from the Agrigento mine, Agrigento, Agrigento Province, Sicily, Italy. In...Alston Moor (Tindle 2008). The Yorkshire Silverband mine, Cronkley Fell, Durham, has produced interesting...particularly from the Botallack mine, Wheal Owles, and Wheal Cock, St. Just district, as well as Wheal Edward...Edward, Callington district. The aragonite from these mines is found as white, gray, red, or blue-green globular |  | | Journal (article/letter/editorial) | | Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany Helmholtz-Zentrum Dresden-Rossendorf, Hemholtz...Technology, Chemnitzer Str. 40, 09599 Freiberg, Germany; r.moeckel@hzdr.de Department of Geological Sciences...commonly characterized as banded chalcedony. In detail, chalcedony layers in agates can be intergrown...starts with spherulitic growth of chalcedony continuing into chalcedony fibers. High concentrations of lattice...banding and colors. Keywords: agate; quartz; chalcedony; silica minerals; micro-structure; trace elements; |  | | Journal (article/letter/editorial) | | pyrargyrite, stephanite, polybasite in Obersachsen (Germany), Fresnillo in Zacatecas and acanthite appeared...Guanajuato (Mexico) and has become the richest silver mine in the world, in more recently Bou Azzer and Imiter...ceased vein. The San Juan production by the de Rayas mine in time of World War II. Guanajuato also In 1946...very city In Morocco, the of Oberschlema Bou Azzer mine, itself, which finally already very had to be relocated...and east of Schlema, 2014 Tucson show. The Imiter mine began its modern producing many quality specimens |  | | Book | | Nati 'fe Copper. -.. Red and Black Oxides Blue and Green Carbonates Silicate of Copper - COPPER. ......Arseniates of Copper Phosphate of Copper Copper Glance Copper Pyrites .. Purple Copper Ore - Tennantite...54 55 56 56 57 59 • FOREI'GN ORES. . • I •• COPPER -" -... - - Galena Anglesite,- &c. Cerussite... • Page . Wall-cases 15 to 23. .. ~ Native Copper Red Oxide - Black Oxide .. - Chrysocoll a...Phosphates, Arseniates, &c. Copper Glance and Pn.rple Ore Kupfer Schiefer Copper Pyrites ... ... ·· Fahlerz |  | | Journal (article/letter/editorial) | | the present paper has been prepared. Boltsburn mine, for many years the source of some of the finest...part of the area, between the Tyne and the Craven district of West Yorkshire, is a structural block bounded...Grit. They re-appear, however, in the High Peak district 470 TEE AMERICAN MINERALOGIST of Derbyshire...agglomerate and basaltic necks. Lead, zinc and copper ores, barite and witherite as well as fluorite...marcasite, pyrite, niccolite, ullmannite, quartz, chalcedony, aragonite, siderite, dolomite, alstonite, baryto-calcite |  | | Book | | Evgeny Sidorov, Andrey Borovikov and Yurii Seryotkin Copper-Containing Agates of the Avacha Bay (Eastern Kamchatka...begins with non-equilibrium spherulitic growth of chalcedony. The banding and colors in agate are “governed...carbonaceous matter associated with (fibrous) chalcedony or fine-grained quartz is the major coloring agent...et al. [7] present the results of studies of the copper-containing agates from the Avacha Bay (Eastern...the copper minerals in agates from this location are native copper, cuprite, and various copper sulfides | | | Book | | retain their inner crystalline structure, e.g. chalcedony. All minerals are solid with one exception: mercury...however, are composed of a single element, such as copper, gold, sulphur, or carbon. The latter is better...they often become filled with quartz, agate or chalcedony. The largest part of the gases and vapour escapes...damaged by the finger nail. A piece of 19 copper wire or a copper coin (hardness approx. 3) scratches minerals...a piece of copper in one hand, and a piece of amber in the other, we can feel that copper is colder. |  | | Journal (article/letter/editorial) | | 5. Hematite, 30 × 5.5 сm, Eibenstock, Saxony, Germany; from the Henkel collection, 1918, No. 4320. Figure...Pyrargyrite, 8 × 8 cm, Gelobtes Land mine, Brand-Erbisdorf, Freiberg, Saxony, Germany; from the Henkel collection...MINERALS Figure 8. Label for chalcedony shown in figure 9. Figure 9. Chalcedony, 9 × 7 cm, Kamchatka Peninsula...12 (left). Eudialyte, crystal 12 × 5 cm, Koashva mine, Khibiny, Kola, Russia; 2005, No. 91898. Figure...calcite, and epidote, 15 × 12 cm, Akhmatovskaya mine, South Urals, Russia; from the P. A. Kochubey collection |  | | Catalog/List | | mineral, "At were of large, prisms, of this mine have been obtained, more Note. - Galena offer...in the specimens Dundasite, bunches samples Mine, of occurs lode. beautiful white large more...originally Cornish mining ceeding by colour, Mine fractures of great the mineral often Mount ...extremely some rarely Anglesite. Embolite, back Mine. with minute of small of capping gossan the... 'holy fallen filled with the olivine it district: from or at regarded The moderate a at high |  | Bauer, Matthias E., Burisch, Mathias, Ostendorf, Jörg, Krause, Joachim, Frenzel, Max, Seifert, Thomas, Gutzmer, Jens (2019) Trace element geochemistry of sphalerite in contrasting hydrothermal fluid systems of the Freiberg district, Germany: insights from LA-ICP-MS analysis, near-infrared light microthermometry of sphalerite-hosted fluid inclusions, and sulfur isotope geochemistry. Mineralium Deposita, 54 (2) 237-262 doi:10.1007/s00126-018-0850-0 | Journal (article/letter/editorial) | | hydrothermal fluid systems of the Freiberg district, Germany: insights from LA-ICP-MS analysis, near-infrared...Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The historic silver mining district of Freiberg...Freiberg (Germany) comprises hydrothermal vein-style mineralization of Permian and Cretaceous age. We compare...Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany 2 Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz...Chemnitzer Str. 40, 09599 Freiberg, Germany Introduction The silver mining district of Freiberg is well-known |  | | Journal (article/letter/editorial) | | crystal'ized cinnabar which comes from the Culver-Baer mine, Sonoma Co., Calif. Colorado—An interesting article...Michigan, Ann Arbor, Mich.) The Micanite pegmatite district lies across the Park-Fremont County line in south-central...village of Micanite. The pegmatite of the Micanite district contains unusually large 378 ROCKS AND MINERALS...operating a cobalt mine in the Blackbird district of Lemhi Co., Idaho. This mine is reported to be the...the largest cobalt mine in the U. S. Reliable reports say that plans are being made to construct a large |  | | Catalog/List | | August 2020 4 5 Fluorite on Quartz Yaoganxian Mine, Chen Zhou, Hunan Prov., China 6.35 cm tall x 6...with Pyrite Inclusions on Manganocalcite Yaoganxian Mine, Chen Zhou, Hunan Prov., China 16 cm tall x 18 cm...cm tall x 5.7 cm wide 14 15 Azurite Milpillas Mine, Mun de Nacozari de Garcia, Sonora, Mexico 14 cm...cm tall x 10.2 cm wide 16 17 Grape “Chalcedony” Mamuju, Sulawesi Barat Prov., Sulawesi, Indonesia...tall x 7 cm wide 22 23 The Tourmaline Queen Mine draws its fame from the “Blue Cap” pocket discovered |  | | Journal (issue) | | Göetze, Mineralogist TU Bergakademie Freiberg, Germany Introduction Agates are some of the most fascinating...Minerals Elements Sulfides Oxides/Hydroxides copper, lead, graphite pyrite, marcasite, sphalerite,...calcite has been formed as overgrowths on quartz or chalcedony in the central part of the agate geodes (Fig...(Fig. 1a), but calcite layers intergrown with chalcedony are also possible (Fig. 1b). A special case is the...marginal parts of the agates as well as within the chalcedony matrix cause the typical colorations in red, |  | Voudouris, P., Mavrogonatos, C., Spry, P.G., Baker, T., Melfos, V., Klemd, R., Haase, K., Repstock, A., Djiba, A., Bismayer, U., Tarantola, A., Scheffer, C., Moritz, R., Kouzmanov, K., Alfieris, D., Papavassiliou, K., Schaarschmidt, A., Galanopoulos, E., Galanos, E., Kołodziejczyk, J., Stergiou, C., Melfou, M. (2019) Porphyry and epithermal deposits in Greece: An overview, new discoveries, and mineralogical constraints on their genesis. Ore Geology Reviews, 107. 654-691 doi:10.1016/j.oregeorev.2019.03.019 | Journal (article/letter/editorial) | | Nordbayern, Universität Erlangen-Nürnberg, Erlangen, Germany; karsten.haase@fau.de; 5 reiner.klemd@fau.de;...Institut für Geologie, TU Bergakademie Freiberg, Germany; Alexander.Repstock@geo.tu-freiberg.de Institute...of Mineralogy-Petrology, University of Hamburg, Germany; alioudjiba209@yahoo.de; ubis@uni- 7 hamburg...sericitic-altered Miocene granodiorite stock in the Lavrion district. Bonanza grade Au- and/or Ag-rich veins with epithermal...Mineralogy and Petrology, University of Hamburg, Germany. Operating conditions were: 20 kV and 20 nA, with |  | | Report (issue) | | are recovered from the oxidation zone of a small copper deposit in rocks of the Abenab Subgroup of the...varieties 10.2.1. Agate 10.2.2. Carnelian 10.2.3. Chalcedony 10.2.4. Chrysoprase 10.2.5. Jasper 10.2.6. Moss...scale to the north of Rossing Siding, Swakopmund District (Martin, 1965). The mineral has also been reported...Marmor Pforte 37, Swakopmund District. On Neuhof 100 in the Maltahohe District, amazonite is found in granitic...the homestead on the farm Donkerhuk 91, Karibib District (DeKock, 1935; Biirg, 1942). Forming the crest | | | Book | | Wall-cases 1 to 14. - CoPPER - - - sº- - * - - - - • - Native Copper - Red and Black Oxides...Silicate of Copper Arseniates of Copper - . • *- - - - - - - - * • - e - -* • Copper Glance ->...Tennantite . - * Phosphate of Copper Copper Pyrites - , Purple Copper Ore. - l - - - - - - -...FOREIGN ORES.. " .* Wall-cases 15 to 23. CoPPER Native Copper Red Oxide Black Oxide - - - - - 1... - 60 61 62 - - - Copper Glance and Purple Ore - Kupfer Schiefer Copper Pyrites - - " - " - - |  | | Journal (article/letter/editorial) | | mineralized with polymorphs of silica: opal-A, opal-C, chalcedony, and quartz. Less familiar are fossil woods preserved...carbonate, calcium phosphate, various iron and copper minerals, manganese oxide, fluorite, barite, natrolite...pyrites, siderite, hematite, manganese oxide, various copper minerals, fluorite, barite, natrolite, and the...USA) to silicified wood that contains abundant copper minerals (Turkey “colla wood”). Another mineralogy...Isle of Wight, England Kansas, USA Geiseltal, Germany British Columbia, Canada Ellesmere Island Arctic |  | | Journal (article/letter/editorial) | | Murfreesboro, Pike Co., Ark. This is in the cinnabar district of Howard, Pike, and Clark Counties, Ark. This...Modesto, Calif. Both specimens come from an old Gold mine at Placerville, El Dorado Co., Calif. The following...James G. Manchester in your Dec. 1941 issue as chalcedony pseudomorph after coral are found here (in Hillsborough...picked up on land lots, 199 and 200, 10th Land District, six miles northeast of Greenville (Meriwether...capital for a good price. I have not entered the district with any claims but I was the first to go down |  | | Journal (article/letter/editorial) | | epithermal gold mineralization in the Rosario–Bunawan district, East Mindanao Ridge, Philippines Jochen Kolb...Springer-Verlag 2009 Abstract The Rosario–Bunawan district is situated about 200 km north of Davao City,...Southern Philippines. Gold is produced from the Co-O mine, containing about 2,034,000 t of ore at 10.9 g/t...Rosario–Bunawan district and the Co-O mine is confined to narrow (0.2–4 m) low-sulfidation quartz–chalcedony–calcite...Aachen University, Wüllnerstr. 2, 52056 Aachen, Germany and, to a lesser extent, the Co-O trends during |  | | Journal (issue) | | Gressman tom.gressman@minrec.org The Tintic District: Juab and Utah Counties, Utah...................COVER: CLINOCLASE, 3.9 cm, from the Mammoth mine, Tintic District, Utah. Rock Currier collection; Jeff Scovil...holds a sample of a pascoite group mineral at a mine in Grand County, Utah. Died, Alex Earl, 26 Jayson...over the American West. A trip to the Blue Bell mine near Baker, California, in 2016 was particularly...Phurcalite with brochantite, 2-mm view, from the Posey mine, San Juan County, Utah. Alex Earl collection and |
|
