 | | Book (edition) | | ruby, and sapphire, and semi-precious stones like quartz, agate, and turquoise. People interested in the...for stone cutting and cabochon making, as saat A quartz crystal ball. their durability, color, and variety...as fluorescence, to name Gemstone tourmaline in quartz. just a few. Mankind’s diverse uses of rocks...fluorescence and radio- activity. A beautiful quartz crystal druzy-coated mineral specimen. A typical...two categories, crystalline quartz and cryptocrystalline quartz. Quartz is one of the most common minerals |  | | Book | | poly.morph of graphite and diamond. The minerals quartz , cristobalite, citrine, amethyst, and tridymite...talc gypsum calcite fluorite apatite orthoclase quartz topaz corundum diamond fingernail: rubbing fingernail:...are even harder and will scratch to hardness 6. Quartz, Mohs' hardness 7, will visibly scratch window...weight of the same volume of water. For instance, quartz with a density of 2.65 is 2.65 times as heavy as...rock-forming minerals that make up sand such as quartz and feldspar. This is the principle of panning | | | Book | | poly.morph of graphite and diamond. The minerals quartz , cristobalite, citrine, amethyst, and tridymite...talc gypsum calcite fluorite apatite orthoclase quartz topaz corundum diamond fingernail: rubbing fingernail:...are even harder and will scratch to hardness 6. Quartz, Mohs' hardness 7, will visibly scratch window...weight of the same volume of water. For instance, quartz with a density of 2.65 is 2.65 times as heavy as...rock-forn1ing minerals that make up sand such as quartz and feldspar. This is the principle of panning | | | Book | | talc gypsum calcite fluorite apatite orthoclase quartz topaz corundum diamond Simple testing devices...weight of the same volume of water. For instance, quartz with a density of 2.65 is 2.65 times as heavy as...rock-forming minerals that make up sand such as quartz and feldspar. This is the principle of panning... Borax (D Boron, California/USA Na2(8405(0H)4] •8 H20 Q) Boron, California/USA Streak white. Mohs'... colemanire, kernite, ulexite. Found in: Nevada/USA; Tibet/China; Kashmir/Pakistan/ India; Kazakhstan/USSR; | | | Book | | polymorph of graphite and diamond. The minerals quartz, cristobalite, citrine, amethyst, and tridymite...crystals is often called multiple twinning. Pyrite Quartz 14 Mineral Aggregates are called aggregates...talc gypsum calcite fluorite apatite orthoclase quartz topaz corundum diamond fingernail: rubbing fingernail:...are even harder and will scratch to hardness 6. Quartz, Mohs’ hardness 7, will visibly scratch window...instance, Volume can be determined in several quartz with a density of 2.65 is 2.65 different ways: |  | | Journal (article/letter/editorial) | | 466–472, 2001 Fibrous nanoinclusions in massive rose quartz: The origin of rose coloration JULIA S. GOREVA...Planetary Sciences, California Institute of Technology, MS 100-23, Pasadena, California 91125, U.S.A. ABSTRACT...ABSTRACT Pink nanofibers were extracted from rose quartz from 29 different pegmatitic and massive vein localities...absorption spectra of the fibers and the initial rose quartz, we conclude that these nanofibrous inclusions...massive rose quartz worldwide. These fibers do not occur in the rare, euhedral variety of pink quartz. Redox |  | | Journal (article/letter/editorial) | | Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA a r t i c l e i n f o Article...xenoblastic grains of quartz and feldspar, as well as by rounded inclusions of quartz in feldspar and vice...grains, and euhedral plagioclase inclusions in quartz and K-feldspar. The contrast between these two...unmixing and recrystallization of hypersolvus (quartz–alkali feldspar) granite during slow subsolidus...shown by K-feldspar in the Tuolumne Batholith, California, USA, “are not clearly igneous (and certainly not |  | | Catalog/List | | Carbide Mine, Wilson Springs Garland County, Arkansas USA) lxl £4 1x2 £7.50 497 TELLURITE Te 0/2 good yellow...metallic (Herbb £2 Mine, Powhatton County Virginia USA) lcm £6 314 PYRARGYRITE Ag/3 SbS/3 pure crystalline...+ Micros! Monument 1 Mine, Navajo County,Arizona,USA) lxl.£3.50 1x2 £7.00 118 CONICHALCITE green coating...on matrix. (Gold Hill Mine, Tooele County) Utah,.USA) lxl £2.50 1x2 £4 082 CUBANITE CuFeS metallic mass...(Rowley Mine, Jobes Shaft Maricopa County, Arizona USA) . lxlins £4 Rare Copper Mineral 270 MIXITE Bi Cu |  | | Catalog/List | | Crystallized Gold from the famed Eagle’s Nest Mine in California A superb Crystallized “Leaf” Gold specimen once...“classic” Rhodochrosite with associated Pyrite and Quartz from the Sweet Home Mine in Colorado An unusually...Iron. When Gold occurs with a matrix rock like Quartz, a Specific Gravity test is often performed to...exquisite formations often atop matrix rock like Quartz. Gold nuggets are typically valued at some multiple...Alaska Canada Australia Nevada Brazil Romania California Venezuela This catalog proudly features the |  | | Catalog/List | | calcite. 14 Africa Liddicoatite Tourmaline with Quartz Anjanbonoina, Antananarivo Prov., Madagascar 7...extreme rarity. This rubellite red liddicoatite and quartz was mined in 2018. It was part of a small pocket...large crystals of wine-red tourmaline with smoky quartz and cleavelandite that rival the great historical...historical tourmaline discoveries in Brazil, California and the Himalayas.” —(2019). The Malkhan District. The...separate distinct group known as “Alpine Minerals.” quartz gwindels for which the region is known. For mineral |  | | Report (chapter) | | Joaquin basin, California, USA D. T. NGUYEN, R. A. HORTON, JR* & A. B. KAESS California State University... 9001 Stockdale Highway, Bakersfield, CA 93311, USA *Corresponding author (e-mail: rhorton@csub.edu)...albitization of feldspars, the formation of K-feldspar and quartz overgrowths, the precipitation of kaolinite and...field is located c. 16 km NW of Bakersfield, California (Fig. 1) near the axis of the San Joaquin basin...the Stevens sandstones within the Monterey Fm (California DOGGR 1998). Although sandstones in the Kreyenhagen |  | | Journal (article/letter/editorial) | | University of Texas at Austin, Austin, TX 78712, USA b a r t i c l e i n f o Article history: Received...Los Cabos Block (southernmost part of the Baja California Peninsula). The COGB constitutes the most economically...arguably correlates with the Mother Lode trend in California and Nevada, whereas the cluster of deposits in...mentioned, are the northernmost part of the Baja California Peninsula, and the Arteaga and Oaxacan metamorphic...assemblages in them are generally dominated by quartz ± “sericite” ± pyrite, and may be carbonate-rich |  | | Journal (article/letter/editorial) | | Article Late Tertiary Petrified Wood from Nevada, USA: Evidence of Multiple Silicification Pathways George...Western Washington University, Bellingham, WA 98225, USA; E-Mail: mustoeg@wwu.edu; Tel: +1-360-650-3582 Academic...precipitation may produce opal, chalcedony, and quartz as deposits within a single cavity. Silica polymorphs... In Nevada, specimens that contain crystalline quartz, this mineral appears to have been formed by direct...Keywords: petrified wood; silica; opal; chalcedony; quartz; paleobotany; Nevada Geosciences 2015, 5 287 |  | | Catalog/List | | on Hidalgoite (Gold Hill Mine Tooele County Utah USA) lxl f2.5O lx2 f5.OO 2x2 flO C263 AXINITE rich...Devon) 2x2 f6 C27O CHALCOPYRITE good crystals Also Quartz crystals and Peru) lxl f3 lx2 C271 CHLORITE variety...FOSHAGITE creamy white masses Riverside County, California, lxl t2.5O lx2 f5 C277 GISMONDINE chalky white... white to colourless GOWERITE rich accicular California (Corkscrew Canyon, Inyo County, f.1.70 lem glass...masses 1 X 1/2 (Betroka f6 spots mass on other USA) rich piece f.3.50 Madagascar-) scattered lxl 1/2 |  | | Journal (article/letter/editorial) | | 67 troy ounces, Fairbanks mining region, Alaska, USA. Donated in 1977 by Arthur Sexaur. University of...1985 nugget Alaska, Ganes Creek 2004 mass with quartz Alaska, Ganes Creek 1985 Alaska, Ganes Creek...ounces NAC Alaska, Ganes Creek 1905 mass with quartz 51.6 ounces Tisler specimen www.akmining.biz;...biz; 12/2016 Alaska, Ganes Creek 1905 mass with quartz 55 ounces Wiltz specimen www.akmining.biz; 12/2016...exhibits ounces), Wiseman, Brooks Range, Alaska, USA. Found in 1995. at least moderate to significant |  | | Journal (article/letter/editorial) | | of the Laramide subduction channel in southern California Haoran Xia and John P. Platt Department of Earth...Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA Correspondence to: Haoran Xia...Schist in the San Gabriel Mountains, southern California, formed in the Laramide subduction channel, exhibits...During D1 the dominant deformation mechanism was quartz pressure solution, and the estimated shear stress...porphyroblasts. Metagreywacke was deformed mainly by quartz pressure solution and metachert was deformed dominantly |  | | Journal (issue) | | for the deposit. The Orange River is famous for quartz in all colors and habits but fluorite is rare,...in quartz' from Capelinha (Minas Gerai . Brazil). The pieces are quite pretty. transparent quartz crystals...oxides coating the cpidote, separating it from the quartz. Several dealers had superb barite crystals from...tabular crystals in clusters to 6-7 mm on colorless quartz. I was delighted to see botryogen crystals from...synthetic crystals sold for minerals, irradiated quartz, etc. That said, it is worth noting a few Rumanian |  | | Journal (article/letter/editorial) | | Sciences, University of Southern California, Los Angeles, CA 0089-0740, USA Received 12 October 2007; accepted...overgrowths being impeded by simultaneously crystallizing quartz and feldspar grains. © 2008 Elsevier B.V. All rights...intrusive complex, Sierra Nevada batholith, California, USA, were formed very late by “textural coarsening”—later...Canyon, south of Peeler Lake, Sierra Nevada, California, USA. Scale 15 cm long. They added that “Higgins...Canyon, south of Peeler Lake, Sierra Nevada, California, USA. Scale 15 cm long. R.H. Vernon, S.R. Paterson |  | Izaguirre, Aldo, Iriondo, Alexander, Kunk, Michael J., McAleer, Ryan J., Atkinson, William W., Martínez-Torres, Luis M. (2017) Tectonic Framework for Late Cretaceous to Eocene Quartz-Gold Vein Mineralization from the Caborca Orogenic Gold Belt in Northwestern Mexico*. Economic Geology, 112 (6) 1509-1529 doi:10.5382/econgeo.2017.4519 | Journal (article/letter/editorial) | | Tectonic Framework for Late Cretaceous to Eocene Quartz-Gold Vein Mineralization from the Caborca Orogenic...20192, USA of Geological Sciences, University of Colorado at Boulder, Boulder 80309, Colorado, USA of Geology...Colorado School of Mines, Golden 80401, Colorado, USA 6 Departamento de Geodinámica, Universidad del...American Cordillera that hosts orogenic gold-bearing quartz veins and extends from northwestern Mexico into...geochronology of white micas associated with gold-bearing quartz veins along the Caborca orogenic gold belt suggests |  | | Journal (article/letter/editorial) | | elongation of recrystallized aggregates (e.g. of quartz and mica), (d) grainsize reduction, (e) fine-grained...recrystallized aggregates of weaker minerals (e.g. quartz and mica) between the boudins, (j) foliation passing...solid-state S/C arrangements, evidence of c-slip in quartz, and especially evidence of migration of residual...intracrystalline plastic deformation (c-slip in quartz indicating plastic deformation at temperatures...plastic deformation or elongation of the interstitial quartz. Crossed polars; base of photo 4.4. mm. Fig. 5 |  | | Journal (article/letter/editorial) | | Adularia (K-feldspar) H, defects, 60(21): 4075 Alaska, USA U-Pb dating, zircon, Tertiary plutons, panhandle...60(2): 197; erratum, 60( 11): 2061 river water, California, 60( 8) : 1323 speciation, KOH solution, 60(...production, nuclear spallation, 60(4): 679 California, USA Death Valley, shrubs and trees, 60( 16): 3015...Florida, 60(24): 5075 leaves, plants, Death Valley, California, 60( 16): 3017 methane, marine sediment, 60(...I71 tree rings, Tamarix aphylla, Death Valley, California, 60( 16): 3019 Carbon, organic cycle, marine |  | | Book | | known to humankind since prehistoric times such as quartz and gold, but also minerals first described quite...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...jewelry, electronics. Gold, 411 mm. El Dorado, California. U.S.A. Gold Au CUBIC • • Properties: C |  | | Catalog/List | | Valley, Sheeprock Mts., Vernon, Tooele Co., Utah / USA; The exceptionally rare Thallium-Oxide, forms deep... Helvetia, Santa Rita Mts., Pima Co., Arizona / USA; Blue spherical crystal aggregates of 4 mm, rich...from hexagonal, tabular microcrystals in white Quartz; KS 48,00 Brianyoungite xls Pferdeköpfe Pass, Wippra...acicular crystals of up to 2 mm on cavities in Quartz. Old specimens found in the 1960s; KS 38,00 Celestine...Marietta Quarry, Woodville, Sandusky Co., Ohio / USA; Light blue transparent prismatic crystals of 1 cm |  | | Journal (article/letter/editorial) | | example, there are nine small thumbnails of gold in quartz with minor matrix and sulfides from Goldenville...thumbnails from the Eagle’s Nest mine, Foresthill, California; and a local prize, two nuggets from the Williams...from Nigeria, and a very small piece of gold in quartz with muscovite flakes(!) from the Katchkar River...Russia USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA...USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA |  | | Catalog/List | | Dufrenoysite and Corkite page 3 General stock Quartz after Gypsum page 13 , Annabergite page 8 Sussexite...Calcite.(Dark Star Mine,Ravalli County, Montana USA) 1 x 14 £2.50 1x1 £4 1x2 £10 156 NATIVE BISMUTH,...Carbide Mine, Wilson Springs Garland County, Arkansas USA) 1x1 £4 1x2 £7.50 360 PARATELLURITE TeO White waxy...micro's on matrix. (Getchell Mine,Humboldt Co . Nevada USA) 5mm £4 up to 1.5cm £7 242 KOLBECKITE Scandium Phosphate...in ■ matrix. (Mohawk Mine,Keenaw County Michigan USA) 1x1 £3 095 CALCIOVOLBORTHITE Ca Cu VO/4 quite good |
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Colorado Mine, Colorado, Colorado Mining District, Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA