 | | Journal (article/letter/editorial) | | magnetic field is reported, for single crystals of quartz, corundum, and calcite. It was seen for the first...10-1~ The A)~ values were 5.50 x 10 .9 emu/cc for quartz, 4.20 x 10 -9 emu/cc for corundum, 9.9 x 10 -s...of oscillation for some basic minerals such as quartz, calcite and witherite. The diamagnetic anisotropies...the torque due to the tensional rigidity of the quartz fiber suspending the crystal was comparable to...observed for the diamagnetic crystals of corundum and quartz (Uyeda 1993 a). First of all, the period of harmonic |  | | Report (issue) | | conglomerates. Association: Zeolites, prehnite, calcite, quartz. Distribution: A common zeolite, with many occurrences...occurrences of large and ¯ne crystals. In Iceland, at the Helgustadir mine, Reydarfjord, and the Teigarhorn, |  | | Journal (article/letter/editorial) | | ICELAND SPAR IN NEW MEXICO VrNcnur C. Knr.r.nv, Llniaersity oJ New Merico, Albuquerque,New Me*ico....while prospecting the ridge south of the Harding mine, Juan A. Brown of Dixon, New Mexico, uneartheda...shock undoubtedly ruined some of the near-surface Iceland spar in the deposit, but exposure in this manner...Harding mine, producer in the past of trimmed mica, Iepidolite, and spodumene.The Iceland spar mine lies...lies about 400 feet southwest of the Harding mine quarry, at an elevation of 7500 feet. Although discoveredas |  | | Journal (article/letter/editorial) | | CHE;\IISTRY. 1. Scolezite, from Bulandstindr, in Iceland. 2. Natrolite, from Jakuben, in Bohemia. 3. Chabazite...Stilbite, from Djupivogur, in Iceland. 9. Desmine, from Helgustadir, in Iceland. 10. Thomsonite, from Nalsoe...analyses of carbonaceous schist taken from the region of the roof and wall of A bed of coal, at St. Gilles...belong to gneiss, different nepheline-syenites, a, quartz-augite-diorite, and olivine diabase. The most important...microcline, microperthite, plagioclase, biotite, quartz, more or less rich horoblende, and the accessory |  | | Journal (article/letter/editorial) | | calcite, that in the plumose-calcite-aragonite-quartz zone in the northwestern part of the Antrim Basalts...square miles in extent containing the plumosecalcite-quartz-aragonite assemblage. Practically all the calcite...illustrations of calcite from the Tertiary basaltic region of the North Atlantic in Goldschmidt's Atlas (1913)...writer's observations in the Tertiary basalts of eastern Iceland suggest that in fact the Antrim type of habit...environment of the local type. Thus the well-known Helgustadir Iceland Spar deposit is situated in altered basalts |  | | Other Paper | | Kray, Far-Eastern Region, Russia. Below: Left to right: Various specimens of quartz and Iceland spar studied...a 40 mm optical calcite sphere; a 60 mm optical quartz sphere; a polished rhomb with mark for navigational...set; Leif Karlsen’s large cleavage rhomb from Iceland, subject of his 2003 book Secrets of the Viking...Karlsen held his 65 x 45 x 35 mm cleavage rhomb from Iceland which he used to test his theory of calcite’s use...several candidates 2 for the stone. Among them are “Iceland Spar” calcite of which a coveted optical-quality |  | | Show/Event (guide) | | Occurrences by R. Peter Richards 2 4 Zeolites from Iceland and the Faeroe Islands by Ole V. Petersen 3 Map...Kamoya South II mine, Democratic Republic of Congo byR. L. Mown 2:00 U n u s u a l quartz crystals form...kulanite and phosphophyllite from the Palermo #1 mine, North Groton, New Hampshire bill. W Nizamoff R...shown us that filth and detritus in gemstones, quartz, and chalcedony are both scientifically interesting...Carrollite crystals f r o m the Kamoya South I I Mine, Katanga, DRC, have pronounced facial striations |  | | Report (volume) | | 35. 39. Geologic maps and section of the Bodine mine. 40. Sketch map of the Briebach property. 41. Geologic...Operators, Inc., a New York corporation organized to mine optical spar deposits in California and Montana...Mont., for the purpose of trimming and packing the mine-run material for shipment. The president of Calcite...trimming plant. In the few vugs sufficiently thick to mine without additional excavation, scaffolding and working...development footage and tonnage excavated at each mine and for the operation as a whole. In table 3 the |  | | Report (issue) | | cm high calcite twin on {1 OTI} from the Leiping mine, Guiyang County, Hunan, China. Collection Frederic...cm high calcite twin on {1 OTI} from the Leiping mine, Guiyang County, Hunan, China. Collection Frederic...Fracture Uneven to conchoidal Density Pure calcite (Iceland spar) has a density of 2.71 g/cm3. Other samples...carbonates, has had numer ous names such as calcspar, Iceland spar and others depending on habit, inclusions...largest crystal is 4.3 cm long) is from the Droujba mine in Laki, a small town set in Bulgaria 's Rhodope |  | | | | minerals making up igneous rocks are the silicates: quartz, feldspars, micas, augite, horn¬ blende, and olivine...olivine. In sedimentary rocks, clay minerals,_ quartz, feldspars, calcite, and micas are abundant. However...(4) fluorite; (5) apatite; (6) orthoclase; (7) quartz; (8) topaz; (9) corundum; (10) diamond. This means...hardness of 1, while a mineral with a scratch level of quartz has a hardness of 7. This scale does not represent...Homestake Mine, South Dakota; in Montana and Arizona. Also in Ural Mts., U.S.S.R.; and at Waihi Mine, New |  | | Book (edition) | | minerals making up igneous rocks are the silicates: quartz, feldspars, micas, augite, hornblende, and olivine...olivine. In sedimentary rocks, clay minerals. quartz, feldspars, calcite, and micas are abundant....(4) fluorite; (5) apatite; (6) orthoclase; (7) quartz; (8) topaz; (9) corundum; (10) diamond. This means...of 1, while a mineral with a scratch level of quartz has a hardness of 7. This scale does not represent...Homestake Mine, South Dakota; in Montana and Arizona. Also in Ural Mts., U.S.S.R.; and at Waihi Mine, Mine |  | | Journal (article/letter/editorial) | | Sr isotope geochemistry of basalt weathering in Iceland: Role of hydrothermal calcite and implications...Sr isotope geochemistry of basalt weathering in Iceland: Role of hydrothermal calcite and implications...Sr isotope geochemistry of basalt weathering in Iceland: Role of hydrothermal calcite and implications...of the basalt weathering feedback occurring in Iceland may be lower than previously realized. To test...Li et al., 2016), with a considerable focus on Iceland (Gislason et al., 1996; Moulton and Berner, 1998; |  | | Journal (issue) | | eye, which Is llable to cause asbestosis. Most quartz varieties are comparatively harm less, unless...and collect am ber. I take this new liberty of mine to say that amber continues to be found in Poland...and stretching along the Leba dunes and Gdansl< region, they reach the Vistula Spit beyond Krynica Morska...Carson I. A. Ritchie ICELAND SfR RUKJAVI HOLSMYRI VIK There are no rockshops in Iceland. You have to visit...collecting. This is a very pleasurable experience. Iceland is so undeveloped that every thing offers the |  | | Journal (issue) | | 2017 CALCITE & ARAGONITE CaCO3, 5.3cm, Wenshan Mine, Wenshan Autonomous Prefecture, Yunnan Province...Mineral Associations 3. Mineral occurrences in a region 4. Mineral occurrences in a country Photographs...Photograph gallery 3. Mineral photographs in a region The Rockhound Record, Volume 76, No. 9, November...of “The Alma Rose” Rhodochrosite and Sweet Home Mine, please visit following: https://www.collectorsedge...CaCO3, quartz SiO2, tetrahedrite Cu6[Cu4(Fe,Zn)2] Sb4S13, “The Alma Rose,” 46.5cm, Sweet Home Mine, Alma | | | | | hydrotalcite 51 hydrozincite 47 hydroxides 23 ice 23 Iceland spar 45 _ idocrase 88, 88, 89 ilmenite 26, 28 ilvaite...34 oligist 27 olivenite 65, 65 olivine 75, 75 quartz, smoky 31 realgar 18, 19 rhaetizite 79 rhodizite...variscite 69, 70 quartz 28, 31, 95 quartz, amethyst 29, 31 quartz, quartz, quartz, quartz, aventurine 31...deposits in the United States are in the Adirondack region of New York. Its high melting point makes it suitable...with pyrite, chalcopyrite, and arsenopyrite in quartz veins. ’ The typical colour is yellow, but a different |  | | Book | | hydrotakite 51 hydrozincite 47 hydroxides 23 ice 23 Iceland spar 45 idocrase 88, 88, '89 ilmenite 26, 28 ilvaite...12, 12 quartz 28, 31, 95 quartz, amethyst 29, 31 quartz, aventurine 31 quartz, citrine 3J quartz, morion...morion 31 quartz, rutilated 31 quartz, smoky 31 realgar 18, l 9 rhaetizite 79 rhodizite 55 rhodocrosite...59 zippeite 62 zircon 77, 78, 78 zoisite 88 THE MINE LKINGDOM All physical bodies in Nature can be...or slightly rotated Vitreous. Like glass 3 THE MINE Class I: native ·elements Chemical elernents found |  | | Journal (issue) | | long in clusters were mined at the Mashamba copper mine, in Zaire. When they were introduced at major shows...Arizona, comes to mind immediately, as the Southwest mine produced some of the most handsome, multi-inch,...the world’s finest—have come from the Milpillas mine, in Sonora, Mexico. Actual mining of this deep deposit...were discovered there, and from 2006 to 2012 the mine produced huge quantities of the world’s finest azurites...inpection reveals the crystal rosettes. (Tsumeb mine, Namibia) irocks.com degree. The terms “botryoidal” |  | | Journal (issue) | | Hazen The best grossular garnets from the Jeffrey mine, Asbestos, Quebec ........ .......................1972, and considered to be the finest known Jeffrey mine grossular specimen. Marco Amabili collection; James... Colorado (two), New Mexico (the Bingham Canyon mine), Nevada, Arizona (two), Mexico, Brazil, Northern...in the Czech Republic, the Carpathian Mountains region, Laurium, Morocco, Namibia (two), Tsumeb (two)...COLUMBIA Beaverdell [Highland Bell] mine, Beaverdell. The Beaverdell mine is one of several small mines in |  | | Book | | second piece: the flakes are mica, the glassy grains quartz, and the yellowish grains feldspar. The whole specimen...hich feldspar, quartz, and mica are the main constituents. Quartzite consists of quartz only, mica schist...schist of quartz and mica, and eclogite of garnet and augite. There are also rocks which consist of fragments...times, and there is evidence of at least one flint mine dating from this period. Finely worked and polished...100,000 years ago, beads made of limestone and quartz were found, and when man began to decorate cave |  | | Book | | Several specimens of a particular mineral, e.g. quartz, may vary not only in colour (see plates) but also...graphite. The basic element of the commonest mineral — quartz — is silica (SiO,), a compound of silicon and oxygen...— some 40-50 — are generally rock-forming, e.g. quartz, felspar, mica, pyroxene, amphibole and olivine...At a later stage they often become filled with quartz, agate or chalcedony. The largest part of the gases...walls of the fissures. Well known minerals, such as quartz and calcite, originate at this stage and are known |  | | Book | | porcelain, a piece of glass, a copper coin, a piece of quartz, and some vinegar. Although the author believes...together into one of the six regional federations—Eastern, Midwest, Rocky Mountain, Southwest, California...than 300 dif- ferent crystal forms; or perhaps quartz, which is abundant everywhere and is found in astonishing...as gold and silver. Minerals from one state or region (perhaps the Rocky Mountains, Death Valley, or...since the dawn of history. Flint, a member of the quartz group, was highly prized for weapons, which became |  | | Book | | frequently recommended mineral—predictably—was white quartz (rock crystal). It was obvious that any selective...importance when it occurred with a white mineral such as quartz or calcite. 5. Color. The shade, hue, and intensity...stood atop the “mother” mass of blue-colored rock. A mine was started and a shaft was sunk into the rock....crystal, still imbedded in the country rock, to the mine manager, Mr. F. Wells. With his pocketknife Wells...Cullinan in honor of the superintendent of the Premier Mine in which it had been found, it was sold to the Transvaal | | | Book | | frequently recommended mineral—predictably—was white quartz (rock crystal). It was obvious that any selective...importance when it occurred with a white mineral such as quartz or calcite. 8 J 5. Color. The shade, hue, and...stood atop the "mother” mass of blue-colored rock. A mine was started and a shaft was sunk into the rock....crystal, still imbedded in the country rock, to the mine manager, Mr. F. Wells. With his pocketknife Wells...Cullinan in honor of the superintendent of the Premier Mine in which it had been found, it was sold to the Transvaal |  | | Book | | anatexis of alkali-calcic magmatites (diorites to quartz diorites) which predominate in the lower layer...holocrystalline texture· Granite is a plutonio rock rich in quartz and 24 feldspar. Because of its strength, durability...It is source of alkalis and, due to absence of quartz, a favourable parent rock of alumina-rich latérite...composed magma; the proportion of vopredominantly of quartz and potaslatiles increases due to magma crystallization...latest component of pegmatite develops, i.e. a quartz nucleus in the centre of a vein. The development |  | | Journal (issue) | | California JANUARY, 1941 Volume 4 COVER CALENDAR LOST MINE PERSONALITY PHOTOGRAPHY DISCOVERY BOTANY FIELD TRIP...Devil's Protege By MARY BEAL 12 Specimens From a n old Mine Dump By JOHN W. HILTON 13 Hard Rock Shorty of Death...and There on the desert 42 Briefs from the desert region 45 Just Between You and Me—by the Editor . . ....Illustration by Mary Anderson ROM 1508 to 1648 the mine called the Virgin Guadalupe belonged to Tumacacori...north. Two hundred varas before arriving at the mine there is a black rock marked with a cross and the |
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Helgustadir Mine, Reyðarfjörður, Fjarðabyggð, Eastern Region, Iceland