 | Dekov, V. M., Arnaudov, V., Munnik, F., Boycheva, T. B., Fiore, S. (2009) Native aluminum: Does it exist?. American Mineralogist, 94 (8) 1283-1286 doi:10.2138/am.2009.3236 | Journal (article/letter/editorial) | | of Sofia, 1000 Sofia, Bulgaria 2 Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria...emerald in a pegmatite vein in the Rila Mountain (Bulgaria). This contribution addresses the composition...contains plagioclase, phlogopite, Cr-bearing muscovite, apatite, Be-bearing margarite, beryl, chrysoberyl...the metallic flake. FiGure 1. (a) Inset: map of Bulgaria with the location of the study area in the Rila...= alluvial deposits; 16 = Al0 occurrence; 17 = lakes. resuLts The metallic flake is quite large (~2 |  | | Journal (article/letter/editorial) | | â oligoclase augen and quartz â plagioclase â muscovite leucosome are developed throughout the migmatite...typically characterized by fine-grained quartz, muscovite, carbonate, and sulfide minerals. Paragenesis...emerald assemblage contains quartz, albite, beryl, muscovite, rutile, dolomite, calcite and siderite, (2) a...spodumene-bearing assemblage includes calcite, muscovite and quartz, (3) a calcite assemblage is dominated...assemblage characterized by amethystine quartz, muscovite and calcite. Spodumene and emerald rarely occur |  | | Journal (article/letter/editorial) | | been mined in Afghanistan, Australia, Austria, Bulgaria, China, India, Madagascar, Namibia, Nigeria, Pakistan...and characterized by the development of albite, muscovite, biotite, tourmaline, and pyrite. Fluid inclusions...(BeAl2O4), sapphire, topaz, ïŹuorite, margarite, muscovite, and quartz in a phlogopite âblackwallâ zone,...metamorphic conditions) between pre-existing quartzâmuscovite or quartzâtopaz greisens and ultramaïŹc bodies...post-tectonically, mainly at the contact between muscovite-plagioclase-chlorite boudins and biotite schists |  | Groat, L. A., Marshall, D. D., Giuliani, G., Murphy, D. C., Piercey, S. J., Jambor, J. L., Mortensen, J. K., Ercit, T. S., Gault, R. A., Mattey, D. P., Schwarz, D., Maluski, H., Wise, M. A., Wengzynowski, W., Eaton, D. W. (2002) MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON. The Canadian Mineralogist, 40 (5) 1313-1338 doi:10.2113/gscanmin.40.5.1313 | Journal (article/letter/editorial) | | emerald showing is an apparently near-margin muscovite granite that, over a few tens of meters, grades...2b). A small (approximately 9 m2) outcrop of muscovite granite approximately 600 m east of the emerald...to the line AâAâ in (a). weathering biotiteâmuscovite granite. The granite is weakly foliated, and its...(Russia; Moroz & Vapnik 1999), and Rila localities (Bulgaria; Alexandrov et al. 2001); all are schist-type...e positions of primary quartz, biotite, and muscovite from the granite were determined. The results |  | Marshall, D. D., Groat, L. A., Falck, H., Giuliani, G., Neufeld, H. (2004) THE LENED EMERALD PROSPECT, NORTHWEST TERRITORIES, CANADA: INSIGHTS FROM FLUID INCLUSIONS AND STABLE ISOTOPES, WITH IMPLICATONS FOR NORTHERN CORDILLERAN EMERALD. The Canadian Mineralogist, 42 (5) 1523-1539 doi:10.2113/gscanmin.42.5.1523 | Journal (article/letter/editorial) | | quartzâcarbonate veins with mm-scale alteration haloes of muscovite and carbonate. The skarn is hosted within the...carbonate entourĂ©es dâun liserĂ© dâaltĂ©ration Ă muscovite + carbonate. Le skarn sâest dĂ©veloppĂ© aux dĂ©pens...near the pluton margins. Accessory minerals are muscovite, garnet, andalusite, and tourmaline. The euhedral...are idiomorphic and attain lengths of 2.5 cm. Muscovite is common near the vein margins and in the alteration...not extend more than a cm from the vein margin. Muscovite, calcite, garnet and diopside are the dominant |  | Giuliani, Gaston, Groat, Lee A., Marshall, Dan, Fallick, Anthony E., Branquet, Yannick (2019) Emerald Deposits: A Review and Enhanced Classification. Minerals, 9 (2) 105 doi:10.3390/min9020105 | Journal (article/letter/editorial) | | younger volcano-sedimentary series or ophiolites in Bulgaria, Canada, China, India, Pakistan, Russia, and Spain...42. Urals (Malyshevo). Ukraine: 43. Wolodarsk. Bulgaria: 44. Rila. Austria: 45. Habachtal. Norway: 46...Types IIB and IIC Canada (Tsa da Gliza, Taylor 2) Bulgaria (Rila) Urals (Malysheva, etc.) Pakistan (Khaltaro)...sandstones. Emerald is found in muscovite greisen formed in the wall-rocks of muscovite-tourmaline-fluorite-bearing...amphibolites, acid metavolcanics tranformed in muscovite schists, and black pelites with interlayered serpentinites |  | | Book | | Proportions Brazil, 378 Angles of Faceted Bulgaria, 399 333 Burma, 400 from Recommended Canada...Laetâs issued an work remarks on more the Province and the Laet, illustration Some information...discussed below. The are Cape St. Helena in the Province of 1783 contained time several However, confusion...sometimes Chemical In the accompanied by muscovite mica. beryllium minerals which that of analysis...ir- fine-grained aggregate of mostly yellowish muscovite and considerable bertrandite with had formed |  | | Book | | Sapphire in Newly Discovered SpinelâChloriteâMuscovite Rocks within Meta-UltramaïŹtes of Ilmen Mountains...Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights into Their Origin...Cenozoic Alkaline Basalts of the Ratanakiri Volcanic Province (Cambodia), Southeast AsiaâTrace Element Geochemistry...pegmatite situated in the Borborema Pegmatitic Province (BPP) from Rio Grande do Norte in Northeast Brazil...sapphires were formed together with a spinelâchloriteâmuscovite rock during the metasomatic alteration of orthopyroxenites |  | | Journal (issue) | | magmatic and metamorphic origins. Within a single gem province in Australia, variations in color observed for...within marble and associated with phlogopite, muscovite, scapolite, margarite, spinel, titanite, pyrite...basalt deposits in Madagascar. In Antsiranana Province, the paleoplacer is composed of a carbonate-karst...kilobars (ZachariĂĄĆĄ et al., 2005). K-Ar dating of muscovite from a pegmatite and an associated quartz-tourmaline...Bonfim, PirenĂłpolis Canada: Tsa da Gliza, Taylor 2 Bulgaria: Rila Urals (e.g., malysheva) Norway: eidsvoll |
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