 | | Journal (volume) | | Survey of Finland Bulletin 314 On the granitic pegmatites of the Eräjärvi area in Orivesi, southern...southern Finland b y Seppo I . Lahti Geologinen tutkimusla itos Espoo 1981 Geological Survey of Finland,...GRANITIC PEGMATITES OF THE ERAJARVI AREA IN ORIVESI, SOUTHERN FINLAND by SE P PO 1. L A H TI with 23 figures...pegmatites of the Eräjärvi area in Orivesi, southern Finland. GeoLogicaL Survey of FinLand, BuLLetin 314...appendices. The pegmatites of the Eräjärvi area (Orivesi, Finland) are middle Proterozoic granitic dyke |  | | Book | | Painopaikka | Printing house: Lönnberg Print & Promo, Finland ISBN 978-952-217-253-2 (sid.) ISBN 978-952-217-254-9...Geological Survey of Finland Espoo 2017 SUOMEN KORUKIVET Gemstones of Finland Kari A. Kinnunen Risto... In addition, the rock types commonly used in Finland as gemstones, are now documented in detail. Photography...demonstrate that more gemstones are known from Finland than from other Nordic countries.The great activity.... . . . . . . . . . . . . . . 196 13 Striped quartz-epidote rock in Iisalmi . . . . . . . . . 199 |  | | Journal (volume) | | pegmatites in the Peräseinäjoki-Alavus area, South Pohjanmaa, Finland by Ilmari Haapala Geologinen tutkimuslaitos...PEGMATITES IN THE PERÄSEINÄJOKI-ALAVUS AREA, SOUTH POHJANMAA, FINLAND BY ILMARI HAAPALA WIT I-I 37 FIGURES...joints. A description of the general geology of the area, completed with a petrological and a tectonic map...bodies and fracture fillings. From the Haapaluoma pegmatite the following minerals, inter aha, are described:...and columbite are presented. From the Hunnakko pegmatite mineralogical description of montebrasite, alluaudite |  | Rasilainen, Kalevi, Eilu, Pasi, Ahtola, Timo, Halkoaho, Tapio, Kärkkäinen, Niilo, Kuusela, Janne, Lintinen, Panu, Törmänen, Tuomo (2018) Quantitative assessment of undiscovered resources in lithium–caesium–tantalum pegmatite-hosted deposits in Finland. Bulletin de la Commission Géologique de Finlande Vol. 406. Geological Survey of Finland | Journal (volume) | | Geological Survey of Finland 2018 Quantitative assessment of undiscovered resources in lithium–caesium–tantalum...lithium–caesium–tantalum pegmatitehosted deposits in Finland Rasilainen Kalevi, Eilu Pasi, Ahtola Timo, Halkoaho... Geological Survey of Finland, Bulletin The Bulletin of the Geological Survey of Finland publishes the results...the Scientific Editor. GEOLOGICAL SURVEY OF FINLAND Bulletin 406 Quantitative assessment of undiscovered...resources in lithium–caesium–tantalum pegmatite-hosted deposits in Finland by Rasilainen Kalevi, Eilu Pasi |  | | 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...exhibit available to serve such a large geographic area. A good part of the current revival of interest...history of the collec tion. In his turn Bob Middleton rose and, after a few re marks, revealed that the collection...roundup of the Micro Miner alogists of the Capital Area; the convention at Rochester, New York; the exhibition |  | | Book | | 120) Page 6: Mimetite (see page 139) Page 248: Quartz (amethyst variety), Erongo Mountains, Namibia *...Earth’s crust are composed ofjust a few minerals; quartz and the feldspar group are the most abundant processes...growth, as exemplified by tourmaline in schist, quartz or phlogopite. Space for Growth Cavities in rocks...about the same time, as happens with pyrite and quartz, or they may have grown one after the other, as...protect and preserve them. Rutile inclusions in quartz are a good example. Growth in Veins Veins are |  | | Book (volume) | | Sweden, are more numerous than Maine's, as well. An area smaller than Oxford County in Murmansk Ob last,...Carolina is a source of true emeralds and outstanding quartz crystals. New Hampshire has also yielded a few...California, is arguably the most important gem-pegmatite district in North America. Its wealth of tourmalines...individuals who have no experience outside of their home area. The first specimen that they see is by definition...specimens is sometimes disastrous as well. While rose quartz crystals frequently occur on a stained matrix |  | | Book (edition) | | RE RG RK RM RT RY SH SI TG Norman Bennett Nick Rose \l Natural History Museum of Bern Robert Allgood...Calcite Fluorite Apatite 6 7 8 9 10 Orthoclase Quartz Topaz Corundum Diamond In a few descriptions we...crystallize with right- or left-handed forms (e.g., quartz). epitaxy Overgrowth of one crystal on another...(4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum, (10) diamond. monochromatic...of weakness caused by deformation or twinning. pegmatite Very coarse-grained granitic rock representing | | | Book (edition) | | Calcite 4 Fluorite 5 Apatite 6 7 8 9 10 Orthoclase Quartz Topaz Corundum Diamond In a few descriptions we...crystallize with right- or left-handed forms (e.g., quartz). epitaxy Overgrowth of one crystal on another...(4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum, (10) diamond. monochromatic...of weakness caused by deformation or twinning. pegmatite Very coarse-grained granitic rock representing...associated with authigenic orthoclase, pyrite; quartz, dolomite, and analc1me. SELECTED REFERENCE: Milton |  | | 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 |  | | Book | | away. This type of pseudomorph forms commonly as quartz after calcite. Often called perimorph (the new...molding (Abformung) a. Molding by being coated; e.g., quartz encrusting calcite that then disappears. b. By...Ausfüllung); e.g., the famous talc pseudomorphs after quartz crystals from Göpfersgrun, near Wunsiedel in Bavaria...azurite b. taking up a component; e.g., talc after quartz c. replacement (austausch) of a component; e.g...native copper after aragonite 4. Perimorphs; e.g., quartz after calcite. What is perhaps the most authoritative |  | | Book (edition) | | 20 21 22 23 24 25 26 27 28 29 30 31 Spodumene Quartz Opal Turquoise Lapis Lazuli Jade – Geology and...of glass closely resembling opal in appearance. Quartz, which for many years has been manufactured in...information on a number of topics, particularly on the quartz gems. Mr J Asscher, Jnr, of Amsterdam checked the...pyroxenes, the amphiboles, the micas, the feldspars and quartz. Broadly, these minerals represent the range from...texture shown in thin section and consisting of quartz (clear), feldspar (pale brown, ‘dusty’) and magnetite |
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