 | | Journal (article/letter/editorial) | | Scandian Ixiolite, Pyrochlore and Bazzite in Granite Pegmatite in Tordal, Telemark, Norway. A Contribution to...February 15, 1988 Summary In Tordal granite pegmatite veins cut through a volcano-sedimentary sequence...cleavelandite-amazonite pegmatite occurring as a part of a larger network of granitic pegmatite veins. Alteration...Scandium, tin, beryllium, mineralogy, geochemistry, pegmatite Schliisselw6rter: Scandium, Zinn, Beryllium, Mineralogie...scandium-rich beryl bazzite in a cleavelandite-amazonite pegmatite vein in Tordal, Telemark, southern Norway |  | | Thesis/Dissertation | | Geosciences Mineralogy and petrology of the amazonite pegmatite at Bakstevalåsen, øvre Eiker Øyvind Sunde...Sunde Mineralogy and petrology of the amazonite pegmatite at Bakstevalåsen, øvre Eiker Øyvind Sunde Master...specimen of the amazonite pegmatite at Bakstevalåsen measuring a 15 cm cross-section with amazonite matrix and...imagined I would end up working with this exciting pegmatite. During my work you have given me free hands and... Abstract An exotic pegmatite classified as a rare-element gadolinite type amazonite pegmatite is situated in |  | | Journal (article/letter/editorial) | | 1–17. Classification of Granitic Pegmatites and Pegmatite-Bearing Granitic Systems S. M. Beskina and Yu...paper discusses the concepts of pegmatitic rocks, pegmatite and pegmatoid bodies, and classification of granitic...amphibolite facies conditions, which correspond to pegmatite formation under medium pressure (e.g., Koktogai...Keywords: granitic pegmatite and pegmatoid, classification of pegmatites, amazonite pegmatite, albite– spodumene...spodumene granite, pegmatite-bearing granite system DOI: 10.1134/S1075701518070024 INTRODUCTION Granitic |  | | Journal (volume) | | (the mineral kanonerovite, from the Alabashka pegmatite field in the Middle Urals, is named for him) ...for perovskite; pit # 69, the original Russian amazonite locality; and pit #298 for star corundum. Oh ...other territories with such a complex picture of pegmatite development , which reflects a number of large-scale...1773. Later in 1777-1780, pegmatite veins with topaz, beryl, and amazonite were intensely developed by...minerals were developed . In 1831-1832, 25 poods of amazonite was produced by the order of Count Y.A. Perovskii |  | | Report (issue) | | William "Skip" Simmons and Alexander Falster, pegmatite specialists from the University of New Orleans...pegmatites. Most ore beryl occurs in massive pegmatite zones where crystals may reach considerable size...can be found adjacent to the core margin of the pegmatite and in Suggested Chromophores for Beryl Color-generating...Meter long crystals have been found in Lemnis, Finland, where the largest known crystal is 1 meter long...the world's largest known beryl crystal is a pegmatite at Malakialina, Madagascar, which produced one |  | | Journal (article/letter/editorial) | | and microcline from these pegmatites. Primary amazonite pegmatites are to a large extent replaced by a...cleavelandite phase. Quarrying for lepidolite, amazonite and mineral specimens for collectors (like cassiterite...studied here come from the upper quarry. The pegmatite dike is here about 5 m thick with nearly E-W strike...the process of replacement of amazonite pegmatite by cleavelandite pegmatite in the Høydalen area have been...“Evidently a strong Y, REE signature of the whole pegmatite district persists through advanced fractionation |  | | Journal (issue) | | equipment on its mining claims in mining for amazonite and smoky quartz crystals. Last season we learned the...recovering, and preparing some world-class amazonite and smoky quartz for· even more collectors. (Continues...(Continues on page 2) Finespecimen ofwhite-cap amazonite andsmokyquartzfrom SnowCappocket. Stephanite - Fifth...July. The structures we had been mining on the Smoky Hawk and Elk Horn oYer the past several seasons...quantity of pockets (albeit small) and quality of amazonite color. These are on the east end of a trend that |  | | Journal (issue) | | Richard A. Bideaux M ineralogist feature articles Pegmatite Phosphates: Descriptive Mineralogy and Crystal...Alexander County, North Carolina, and those superb quartz crystal groups with cavernous crystals and striking...Supply Co. $65.00. The Mineralogical Record Pegmatite Phosphates: Descriptive Mineralogy and Crystal...phosphate minerals, which occur at all stages of pegmatite genesis, are among the most extensive of any mineral...interest in them than mineralogists. No doubt, the pegmatite phosphates prove most reward ing collecting material |  | | Journal (article/letter/editorial) | | economic REE deposits and occurrences are known in Finland, Sweden, and Norway. Other Russian REE deposits...Ta-Nb-REE deposit in Zabaykalsky Krai are stockworks of quartz-albite-microcline in alkaline granite (Bykov and...Pechenga-Imandra-Varzuga and Salla-Kuolayarvi belts), garnet-quartz-feldspar, garnet-hornblende, and diopside-hypersthene...Nb-REE Krasnoyarsky Krai 0.5 @ 7.32 Ta-Nb-REE Tyva Quartz-albite-microcline 0.5 @ 0.06 metasomatite after...occurrences (Large Pedestal and Yumperuaiv), and amazonite pegmatite-hosted Host in REE2O3 resources, Mt @ grade |  | | Journal (article/letter/editorial) | | leucogranites) and subalkaline (granosyenites and quartz syenites). Calc-alkaline and subalkaline granitoids...of smaller granitoid outcrops in its north and southwest as well as in the Pre-Olkhon area (Fig. 1). According...interval (465–486 Ma, Table 1). Granosyenites and quartz syenites occurring here yield an age of 495 ± 6...area (Khromykh et al., 2005), SHRIMP-II 495 ± 6 Quartz syenite, Southern Olkhon pluton, Olkhon Island...granosyenites and quartz syenites which extend as a line from the Unshui Cape in the southwest to Tashkinei |  | | Journal (article/letter/editorial) | | PARAGENESES OF MINERALS Stibiomicrolite from Granitic Pegmatite in the Dzhabyk–Karagai Pluton of the South Urals...led to the finding of sti biomicrolite in the pegmatite of the Lepidolite Vein. Its description is given...Geological Survey con toured 5 sites in the Annensky pegmatite field—the Lepidolite, Eastern, Pionersky, Southern...beneath the swampy floodplain of the river. The pegmatite is a fissure vein hosted in the porphyritic leucogranite...zone of geometrical selection of vaguely graphic quartz–oligoclase–orthoclase aggregate with greenish gray |  | | Journal (issue) | | in particular, deposits of nоЬ\е varieties of quartz and agates, and new mineral finds have opened new...occurrences of diamonds, quartz and quartz varieto а TaЫe ties (rock crystal, smoky quartz, citrine, amethyst...hematite, axinite, fluorite, quartz, smoky quartz, citrine, amethyst and otheг quartz varieties Metamorphic(polychronic)...pneumatolitic, related to formatioп of ultrabasic pegmatite. The ruby crystals are rather large; their size...compoпents of rocks, especially of quartz. The main peculiarity of quartz formatioп is moЬiliza tion ofsilica |  | | Book | | forevvord Thenameof Namibia, the countryin the southwest of Africa,is takenfrom the Freiberg.Germanium...Pomona Area. Reuningdiscovered the Hoffnungstrahl pegmatite attheRossing Mountain,sourceof the gemvarietyof...1887) this specimen of secondary copper minerals on quartz from the Sinclair Mine is one of the oldest preserved...cryptocrystallinethese,andparticularly source. quartz such as jasper, chalcedonyand asa possible agate...KleineSpitzkoppe associated with the work on the deposits quartz and eventopaz were carriedto 1890. of the Otavi |  | | Book (volume) | | variety and wealth of locality information concerning quartz gemstones are recognized in a separate chapter...Rhodonite, Idocrase (Vesuvianite), The Garnet Group. Quartz FAMILY GEMSTONES RarRE AND UnusuaL GEMSTONES Chrysoberyl...DECORATIVE GEMSTONES Granite, Graphic Granite, Unakite, Quartz Porphyry (Leopardite), Orbicular Gabbro-Diorite...opal An amazonite crystal (color) An orthoclase crystal Map of Amelia, Va. An amazonite pegmatite Dr. George...Asteriated rose quartz sphere Rough and faceted rose quartz Tourmalinated quartz Catseye quartz, binghamite |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...found with spine! in marble less than 1 mile southwest of Amity (Chamberlain and Robinson, 2013). MALAWI...major associations of Swiss hematite iron roses are quartz, ortboclase, albite, rutile, and zeolites (especially |  | | Journal (article/letter/editorial) | | genthelvite to 5 mm from a miarolitic cavity in a pegmatite about 2 kilometers north of the type locality...phases. Associated minerals include microcline, smoky quartz, and fluorite as centimeter-sized crystals....to 3 mm, in lenses of magnetite, hematite, and quartz in postmagmatic joints in the Conway Granite (Nizamoff...tetrahedral crystals to 1 cm embedded in massive quartz and specular hematite (fig. 6). Its composition...on specular hematite and quartz, field of view 6.4 mm, El Criollo pegmatite, Cerro Blanco, Tanti, Córdoba |  | | Journal (article/letter/editorial) | | inherit some of the chemical characteristics of the pegmatite. In general, the Fe/(Fe + Mg) ratio ranges between...due to pegmatite fractionation combined with partitioning of rare-elements from the pegmatite melt into...in der sfidwestlichen Grenville Provinz. Diese Pegmatite kommen in Gesteinen der mittleren bis oberen Amphibolit-Fazies...Ubernahme einiger chemischer Charakteristika der Pegmatite begleitet. Im allgemeinen schwanken die Fe/(Fe...wahrscheinlich f/it die Entwicklung der Zonierung der Pegmatite verantwortlich. Der Verlust yon H2 durch Diffusion |  | | Report (edition) | | ............................. 69 Microcline (amazonite) ....................................................................... 78 Chapter 11 Minor pegmatite gemstones 79 Lepidolite ......................3 Siliceous gemstones Chapter 12 Quartz group 93 Gem-quality quartz.............................................................................. 94 Quartz mineral varieties .......................................................................... 96 Quartz in pegmatites ................................ |  | | Report (edition) | | displaying folded bands of dark brown hematite, cherty quartz, and golden tiger eye. Bands are up to 10 mm thick................................ 66 Microcline (amazonite)................................................................... 76 vi Chapter 8 Minor pegmatite gemstones 77 Lepidolite.......................3 Siliceous gemstones Chapter 9 Quartz group 91 Gem-quality quartz.............................................................................. 92 Quartz mineral varieties............................. |  | Zhu, Ze-Ying, Wang, Ru-Cheng, Marignac, Christian, Cuney, Michel, Mercadier, Julien, Che, Xu-Dong, Charles, Nicolas, Lespinasse, Marc (2019) Petrogenesis of Nb–(Ta) aplo-pegmatites and fine-grained granites from the Early Cretaceous Huangshan rare-metal granite suite, northeast Jiangxi Province, southeast China. Lithos, 346. 105150 doi:10.1016/j.lithos.2019.105150 | Journal (article/letter/editorial) | | aplo-pegmatites consist of large microcline and quartz crystals that are typically broken and embedded...recurrent magma mixing. AC Keywords: Huangshan aplo-pegmatite; Nb–Ta oxides; multi-stage magma mixing; South... 2014) and the abundance chemistry of mica and quartz (Hulsbosch et al., 2014; Legros et al., 2016, 2018;...PT formed as early as the Kwangsian (Nanping pegmatite; ca. 420–390 Ma; Che et al., 2015), and were also...the Lingshan batholith, a swarm of W–Sn-bearing quartz MA veins is the only surface expression of the |  | | Journal (issue) | | ................... 75 by W. E. Wilson COVER: QUARTZ crystal cluster, 8.2 cm, from the Second Sovietskiy...gave us an interesting study on “Unusually shaped quartz aggregates from Timiauz, Russia” (vol. 27, p. 205-206...Essexite-Diabase, Shoukinite)— Paleogenic (8) Felsite, Quartz Porphyry— Paleogenic (9) Datolite Skarn (10) Danburite...Danburite Skarn (11) Garnetiferous Skarn (12) Quartz-Calcite Veins and Lenses (13) Faults Russian expansion...deposit (after Smirnov et a l 1983). (1) Andesite (2) Quartz Porphyry (3) Siliceous Shale and Sandstone (4) |  | | Book (edition) | | very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage...purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite, sursassite, ardennite, Triclinic...celestine, fluorite, and jarlite in cryolite pegmatite at Ivigtut, Greenland. MR 24, 36, 1993. Adamite... translucent, luster growing on orthoclase and quartz on the Malosa resinous.streak white. H = 5. D = |  | | Book | | Beryl in Rhyolite, 435 Ecuador, 438 339 438 Finland, 438 Early Magmatic, 339 France, French Beryl... But if antiquities, so an and scriptions quartz] “it of a to seems only two that be For...pearl, zircon, coral, soberyl, garnet, carnelian, quartz, and 10 as The shown gems on a emerald...Qift as as other mineral, one Ball. massive quartz vari- called limoniatis 4 Following his discussion...to smooth a the to case that it would be quartz that This that to more engraved noted the |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Republic. Seppo Lahti: Geological Survey of Finland, Espoo, Finland. Joseph Lhoest: Liege, Belgium. John C...Especially when the mineral species is common, such as quartz (75.1.3.1), many varieties (jasper, onyx) are known...chemistry and structure are identical to those of quartz. 5D. Polytypes Materials whose basic structural...only with fibrous minerals Columbite, wolframite Quartz Opal, some yellow varieties of sphalerite Nepheline...are distinctive. Chonchoidal fracture, typical of quartz, gives a fracture similar to the interior of a |  | | Journal (article/letter/editorial) | | Pyromorphite Pyrophyllite Pyroxmangite Pyrrhotite Quartz, lechatelierite, keatite, stishovite, christobalite...double-triangular plot also called Q–A–P–F diagram (quartz, alkaline feldspar, plagioclase, and foid) designed...wolframite, tetrahedrite and base metal sulfide quartz veins have successfully been used to constrain...feldspar, quartz and some mica. Heavy minerals with specific gravities exceeding that of quartz are minor...Granite characterized by alkaline feldspar and quartz with little or no mafic minerals. Porphyritic igneous |
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