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beryl

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Journal Article
Published: 21 December 2020
The Canadian Mineralogist (2020) 58 (6): 785–802.
..., chlorite and/or, biotite, along with several less common secondary minerals, including mainly paragonite, tourmaline, and secondary beryl. The mixture is a common product of early subsolidus hydrothermal alteration at the examined pegmatites of the beryl-columbite subtype – Věžná I and Drahonín...
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Journal Article
Published: 21 December 2020
The Canadian Mineralogist (2020) 58 (6): 803–814.
...Xian Wang; Jiankang Li ABSTRACT Beryl and phenakite are important industrial beryllium minerals. In the hydrous melt of the BeO–Al 2 O 3 –SiO 2 –H 2 O (BASH) system, experiments using quench-type high-temperature and high-pressure equipment have revealed that the different activities of Al 2 O 3...
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Journal Article
Published: 24 November 2020
The Canadian Mineralogist (2020) 58 (6): 767–783.
...Štěpán Chládek; Pavel Uher; Milan Novák ABSTRACT We studied compositional variations in columbite group minerals (CGM) from several granitic pegmatites of the beryl-columbite subtype in the Maršíkov district, Silesian Domain of the Bohemian Massif, Czech Republic. The CGM are characterized...
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Journal Article
Published: 01 February 2020
American Mineralogist (2020) 105 (2): 162–181.
...Gerhard Franz; Oleksii Vyshnevskyi; Michail Taran; Vladimir Khomenko; Michael Wiedenbeck; Ferry Schiperski; Jörg Nissen Abstract We investigated emerald, the bright-green gem variety of beryl, from a new locality at Kruta Balka, Ukraine, and compare its chemical characteristics with those...
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Journal Article
Published: 30 September 2019
The Canadian Mineralogist (2019) 57 (5): 795–797.
... of the pegmatite is principally composed of quartz, albite, muscovite and spodumene. Initial sampling indicates that microcline is sparse and occurs in the spodumene zone and in rare miarolitic cavities. Montebrasite, beryl, cassiterite, almandine–spessartine series garnets, fluorapatite and columbite group...
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Journal Article
Published: 15 July 2019
The Canadian Mineralogist (2019) 57 (4): 551–566.
...Lars Olov Andersson Abstract Trivalent iron ions substituting for Al 3+ are present in many beryls and are abundant in dark red and dark blue beryl. These ions do not contribute any color to the crystals. Dark blue beryl also contains octahedral Fe 2+ ions, which are involved in giving the crystal...
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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 507–518.
...Radoslaw Markus Michallik; Thomas Wagner; Osmo Tapani Rämö; Pasi Heikkilä Miarolitic pockets from the 1628 Ma Luumäki pegmatite in SE Finland contain gem-quality beryl (heliodor) within a matrix of reddish hematite, biotite, muscovite, chlorite, quartz, kaolinite, and bertrandite. Two different...
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Journal Article
Published: 01 December 2018
Mineralogical Magazine (2018) 82 (6): 1323–1332.
... in a beryl–columbite–phosphate rare-element pegmatite where it is commonly intergrown with triphylite–lithiophilite or sarcopside, and may form by exsolution from a high-temperature (Li,Ca)-rich graftonite-like parent phase. It occurs as pale-brown lamellae 0.1–1.5 mm wide in triphylite, and is pale brown...
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Journal Article
Published: 01 December 2018
Mineralogical Magazine (2018) 82 (6): 1307–1322.
... discovered in phosphate nodules of two beryl–columbite–phosphate pegmatites at Lutomia and Michałkowa, respectively, in the Góry Sowie Block, Lower Silesia, southwest Poland. Graftonite-(Mn) is pinkish brown, whereas graftonite-(Ca) shows more brownish colouration. Both minerals have a vitreous lustre...
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Journal Article
Published: 01 January 2018
European Journal of Mineralogy (2018) 30 (1): 107–124.
...Raji Kurumathoor; Gerhard Franz Beryl crystals from Minas Gerais (Brazil), Lumäki (Finland), Sichuan (China), and the Himalayas have been investigated by scanning electron microscopy in order to characterize the shape of etch pits on different crystal faces. The objective was to find out whether...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 561–593.
... Selwyn Basin strata. Euhedral beryl crystals (<0.5 × 5 cm) are present in approximately half of the 26 outcropping veins. Most of the crystals are opaque to translucent and colorless to yellowish and grassy green. Less than 5% of the beryl is transparent, bluish green, and can be considered pale...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 619–650.
... ). Considerations of the chemistry of tourmaline and scapolite associated with emerald and beryl, data from fluid and solid inclusions in these minerals, thermodynamic calculations, and mineral thermobarometric data confirm that Be originated from the pegmatites, transported in a moderately saline aqueous fluid...
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Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 725–741.
... emerald beryl stable isotopes Alps Switzerland The Feldbäch Binntal emerald occurrence is located in the Binn valley, Valais, in southwest Switzerland ( Fig. 1 ). In 1982, a green beryl from this region was exhibited during the mineral show in Zurich ( Mumenthaler & Frey 2003 ). This led...
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Journal Article
Published: 01 June 2017
South African Journal of Geology (2017) 120 (2): 223–230.
... as an alteration product of beryl or bertrandite. The type locality is the Montecatini Quarry, Baveno, Lake Maggiore (Novara Province, Piedmont, Italy; Artini, 1901 ). The mineral was first found at Strzegom (Striegau), Silesia, Poland and described as pilinite ( von Lasaulx, 1876 ). A museum specimen of pilinite...
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Journal Article
Published: 01 March 2017
The Canadian Mineralogist (2017) 55 (2): 195–206.
... the feldspar, quartz, and sericite. This mineral assemblage is, in part, the result of the alkaline nature of the melt that leads to the formation of helvine-group minerals rather than beryl. The epitaxial overgrowths of genthelvite on danalite are particularly unusual because these two minerals do not coexist...
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Journal Article
Published: 01 March 2017
European Journal of Mineralogy (2017) 29 (1): 35–52.
... concentrations. The granites exhibit a light pink colour and contain mainly albite, quartz, muscovite, lithian muscovite, and lepidolite, with minor amounts of amblygonite–montebrasite, herderite, fluorapatite, topaz, and cassiterite, as well as accessory beryl and goyazite. Electron microprobe analyses...
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Journal Article
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 1053–1070.
..., lepidolite, Li-tourmaline, Li-Al and Fe-Mn-phosphates, Sn-, Nb-, and Ta-oxides, beryl and Cs-beryl, spodumene, petalite, and pollucite. Within the core-zone pods, pockets are relatively common. The pockets contain gemmy elbaite associated with quartz, lepidolite, albite, cassiterite, and clay minerals...
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Journal Article
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 971–987.
..., up to ∼5 cm in size, from a graphic unit are completely replaced by a fine-grained mixture of muscovite, chlorite, minor K-feldspar, albite, calcite, and rare secondary beryl; (2) columnar to conic subhedral crystals and irregular grains, up to 6 cm in size, of grey-violet to brownish sekaninaite II...
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Journal Article
Published: 01 June 2016
European Journal of Mineralogy (2016) 28 (3): 571–580.
... chemical analyses were performed on six samples of a rare red variety of beryl, using a standardless method (Calibration Free-LIBS) for quantitative data. Preliminary analyses by Raman spectroscopy and VIS-NIR reflectance spectroscopy showed that two of the six samples were pezzottaite. The LIBS spectra...
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Journal Article
Published: 01 February 2016
Mineralogical Magazine (2016) 80 (1): 103–126.
...-pegmatite dykes occurring in pegmatitic fields, Li mineralization associated with leucogranitic cupolas, beryl-phosphate pegmatites and quartz-montebrasite veins. The main Li minerals of these bodies include Li-mica, spodumene and/or petalite in the pegmatitic fields and leucogranitic cupolas; triphylite...
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