 | | Journal (issue) | | Yellow Topaz from Saxony, Germany History of Emerald Mining at Habachtal, Part II New Regular Feature:...No. 1 EDITORIAL 1 Yellow Topaz from Germany, Emerald Mining in Austriaâs Habachtal Region, A Return...behavior. 18 History of Emerald Mining in the Habachtal Deposit of Austria, Part II Karl Schmetzer The...two-part series on the mining history of Austrian emerald deposits in the Habachtal region. p. 40 REGULAR...nickel impurities âą Nail-head spicule in a Russian emerald âą Dyed fluorite âą Repaired grandidierite âą New |  | Baksheev, Ivan A., Trumbull, Robert B., Popov, Mikhail P., Erokhin, Yuri V., Kudryavtseva, Olesya E., Yapaskurt, Vasily O., Khiller, Vera V., Vovna, Galina M., Kiselev, Vladimir I. (2018) Chemical and boron isotopic composition of tourmaline from the Mariinsky emerald deposit, Central Urals, Russia. Mineralium Deposita, 53 (4) 565-583 doi:10.1007/s00126-017-0759-z | Journal (article/letter/editorial) | | composition of tourmaline from the Mariinsky emerald deposit, Central Urals, Russia Ivan A. Baksheev 1 &...Mariinsky schisthosted emerald deposit in the Central Urals, Russia, both in emerald-bearing phlogopite veins...in exploration of emerald-bearing and emerald-free veins in schist-hosted emerald deposits. The ÎŽ11B...dominated from the granitic rocks surrounding the emerald belt. The narrow range of B-isotope compositions...compositions in tourmaline from throughout the Mariinsky deposit suggests a well-mixed hydrothermal system. Editorial |  | | Journal (article/letter/editorial) | | VIGEZZITE AND ASSOCIATED OXIDES OF NbâTa FROM EMERALD-BEARING PEGMATITES OF THE VIGEZZO VALLEY, WESTERN...occurred during the albitization process of three emerald-bearing pegmatites that cut serpentinites at Mount...by fersmite. Chromium-bearing beryl crystals (emerald) occur along the exocontacts characterized by a...Tourmaline crystals vary from schorlâdravite to Fe-rich dravite. In the model of evolution envisaged...albitized pegmatites, vigezzite, fersmite, emerald beryl, schorlâdravite, columbite, tantalite, Vigezzo Valley |  | Trumbull, Robert B., Krienitz, Marc-Sebastian, Grundmann, GĂŒnter, Wiedenbeck, Michael (2009) Tourmaline geochemistry and ÎŽ11B variations as a guide to fluidârock interaction in the Habachtal emerald deposit, Tauern Window, Austria. Contributions to Mineralogy and Petrology, 157 (3) 411-427 doi:10.1007/s00410-008-0342-9 | Journal (article/letter/editorial) | | fluidârock interaction in the Habachtal emerald deposit, Tauern Window, Austria Robert B. Trumbull Ă Marc-Sebastian...from the Habachtal emerald deposit in the Eastern Alps formed together with emerald in a ductile shear...chlorite schists. Tourmaline is intermediate schorl-dravite in the country rock and become increasingly dravitic...zone during blackwall alteration and tourmaline-emerald mineralization. A regional metamorphic fluid carried...distinction of hosting one of Europeâs few important emerald deposits. Habachtal emeralds were systematically |  | 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) | | MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON LEE A. GROAT§ Department...discovered a major occurrence of emerald in the Finlayson Lake district of southeastern Yukon. The Regal...contact with a mid-Cretaceous granitic pluton. The emerald crystals occur where quartz veins cut mica-rich...chromophore. Fluid-inclusion data indicate that the emerald precipitated from a fluid whose maximum salinity...equivalent. The oxygen isotopic composition of the emerald is highly variable (12.3 to 14.8â°), but there is |  | | Journal (article/letter/editorial) | | 1529-1541 (2006) THE EMERALD- AND SPODUMENE-BEARING QUARTZ VEINS OF THE RIST EMERALD MINE, HIDDENITE, NORTH...the paragenesis and mineral compositions of the emerald occurrence at the Rist mine, Hiddenite, North Carolina...and to examine the possible relationship between emerald and spodumene mineralization and granitic pegmatites...are calcite, amethystine quartz, spodumene and emerald. The early stage of vein development is characterized...with granitic pegmatite was observed. Keywords: emerald, chromian spodumene, hydrothermal quartz vein, |  | 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) | | minerals Review Emerald Deposits: A Review and Enhanced Classification Gaston Giuliani 1, *, Lee A....February 2019 Abstract: Although emerald deposits are relatively rare, they can be formed...systems and models currently used to describe emerald precipitation and predict its occurrence are too...mode of formation for some emerald deposits. Generally speaking, emerald is beryl with sufficient concentrations...crystals. The limiting factor in the formation of emerald is geological conditions resulting in an environment |  | | Journal (article/letter/editorial) | | Fluor-schorl âOxy-schorlâ* Dravite Fluor-dravite âOxy-draviteâ* Chromium-dravite Vanadium-dravite Povondraite Elbaite...existence of the disparate fluortourmaline species (see Table 1). Tourmaline can be classified into groups...Within the restriction of the dominant-valency rule (see above), the dominant anion of the dominant valency...mineralogist F-dominant alkali-group tourmalines: fluor-dravite, fluor-schorl, âfluor-elbaiteâ and fluor-buergerite...to fluor-dravite. Laurs et al. (1996) included information on tourmaline related to emerald mineralization |  | | Book | | mine, known for Yeryfine, rare, pink diamonds. Emerald, alexandrite, garnet, and tourmaline are all significantly...tanzanite and the lusciously nch greener-than-emerald tsavorite. Unique geochemistry in the area holds...Tsavo West National Park, Kenya 44 Chapter 4. Emerald and Alexandrite from Tanzania 49 Location 50 History...Garnets of East Africa 73 Rh.odolite of the Lindi District, Tanzania 76 Tsavorite Garnets 76 The Pyrope-...from Tanzania 96 Red Dravite Tourmaline from the Narok District, Kenya 99 Uvite-Dravite Chrome Tourmaline |  | Lake, Donald J., Groat, Lee A., Falck, Hendrik, Mulja, Thomas, CempĂrek, Jan, Kontak, Daniel, Marshall, Daniel, Giuliani, Gaston, Fayek, Mostafa (2017) Genesis of Emerald-Bearing Quartz Veins Associated With the Lened W-Skarn Mineralization, Northwest Territories, Canada. The Canadian Mineralogist, 55 (4) 561-593 doi:10.3749/canmin.1700025 | Journal (article/letter/editorial) | | (2017) DOI: 10.3749/canmin.1700025 GENESIS OF EMERALD-BEARING QUARTZ VEINS ASSOCIATED WITH THE LENED... Winnipeg, Manitoba R3T 2N2, Canada ABSTRACT Emerald at the Lened occurrence in the western Northwest...transparent, bluish green, and can be considered pale emerald. Using field relationships, Ar-Ar dating, whole-rock...B), and mineral chemistry, the sources of the emerald-forming fluids and chromophores have been assessed;...muscovite) Lened emerald occurrence is a Type I (igneous) skarn-hosted emerald deposit related to the proximal |  | | Journal (article/letter/editorial) | | 799â809, 2010 Cr-bearing tourmaline associated with emerald deposits from Swat, NW Pakistan: Genesis and its...the Main Mantle Thrust in the Swat Valley host emerald deposits and are invaded by quartz veins and stockworks...associated with emerald and/or chromian muscovite. Tourmalines from the Mingora and Gujar Kili emerald mines and...suggests that the tourmaline is cogenetic with emerald formation. The quality and quantity of Swat emeralds...hydrothermal fluids. Large deposits of gem-quality emerald occur in carbonate-altered ultramafic rocks, which |  | Andrianjakavah, Prosper Rakotovao, Salvi, Stefano, BĂ©ziat, Didier, Rakotondrazafy, Michel, Giuliani, Gaston (2009) Proximal and distal styles of pegmatite-related metasomatic emerald mineralization at Ianapera, southern Madagascar. Mineralium Deposita, 44 (7) 817-835 doi:10.1007/s00126-009-0243-5 | Journal (article/letter/editorial) | | distal styles of pegmatite-related metasomatic emerald mineralization at Ianapera, southern Madagascar...Springer-Verlag 2009 Abstract The Ianapera emerald deposit is located in the Neoproterozoic Vohibory Block...within a few kilometers of the Ampanihy shear zone. Emerald mineralization is hosted by metasomatic phlogopite...Another characteristic feature to the Ianapera deposit and, to our knowledge, yet unreported, Editorial...permitting the formation of distal mineralization. Emerald composition was controlled by the chemistry of |  | | Journal (article/letter/editorial) | | com/locate/oregeorev Ore formation of the Dayakou emerald deposit (Southwest China) constrained by chemical and...Trace elements Emerald deposit China Dayakou The Cretaceous Dayakou emerald deposit (southwest China)...from the Dayakou deposit, aiming to constrain the source of ore-forming fluid and emerald genesis. Two types...types of tourmaline, namely type-I formed in emerald-bearing quartz veins and type-II in non-mineralized...compositions. All tourmalines are close to the dravite endmember and belong to the alkali group. The type-I |  | Marshall, Dan, Groat, Lee, Giuliani, Gaston, Murphy, Don, Mattey, Dave, Ercit, T.Scott, Wise, Michael A, Wengzynowski, William, Eaton, W.Douglas (2003) Pressure, temperature and fluid conditions during emerald precipitation, southeastern Yukon, Canada: fluid inclusion and stable isotope evidence. Chemical Geology, 194 (1) 187-199 doi:10.1016/s0009-2541(02)00277-2 | Journal (article/letter/editorial) | | Pressure, temperature and fluid conditions during emerald precipitation, southeastern Yukon, Canada: fluid...Crown emerald veins are somewhat enigmatic, displaying characteristics that are common to emerald deposits...of tourmaline, quartz, muscovite, chlorite and emerald. The veins weather a buff brown colour due to jarosite...primary fluid inclusions within emerald growth zones are consistent with emerald precipitation from H2O â CO2...uplift rate for the region of 0.02 â 0.07 mm/year. Emerald deposits are generally formed when geological conditions |  | | Journal (article/letter/editorial) | | DOI : 10.3749/canmin.49.5.1189 Al-RICH CHROMIUM-DRAVITE FROM THE #1 MINE, BALMAT, ST. LAWRENCE COUNTY,...J9J 3N7, Canada Abstract Aluminum-rich chromium-dravite is found in association with bright green tremolite...and contacts. The assemblage Al-rich chromium-dravite + tremolite + quartz ± phlogopite ± talc ± fluorapatite...Upper Marble Formation. Keywords: Al-rich chromium-dravite, mafic-ultramafic protolith, metasomatic alteration...Sommaire Nous dĂ©crivons un exemple de chromium-dravite alumineuse dĂ©couvert en association avec la trĂ©molite |  | | Journal (issue) | | optically uniaxial gemstones, e.g. ruby, sapphire, emerald, amethyst and citrine, has been described in detail...natural Russian alexandrites originating from the emerald mines in the Ural mountains has been published...crystallographic axes, the following colours are observed (see again Figure 3): Direction of view Pleochroism ...pinacoids a and b in combination with the prism i (see again Figure 1). Thus, the habit of alexandrite crystals...Direction of view Faces/ Interfacial angles(°) ab 90 am 25.21 br 35.30 ms 18.06 as 43.27 bs 46.73 |  | Salvi, Stefano, Giuliani, Gaston, ANDRIANJAKAVAH, Prosper Rakatovao, Moine, Bernard, Beziat, Didier, Fallick, Anthony (2017) Fluid Inclusion and Stable Isotope Constraints On the Formation of the Ianapera Emerald Deposit, Southern Madagascar. The Canadian Mineralogist, 55 (4) 619-650 doi:10.3749/canmin.1700017 | Journal (article/letter/editorial) | | CONSTRAINTS ON THE FORMATION OF THE IANAPERA EMERALD DEPOSIT, SOUTHERN MADAGASCAR STEFANO SALVI§ UniversiteÌ...Scotland, United Kingdom ABSTRACT The Ianapera emerald deposit is hosted in the Neoproterozoic Vohibory domain...peraluminous felsic intrusions outcrop in the area. Emerald occurs mostly within metasomatic phlogopitite and...recognized granitic pegmatites as the source of the emerald-forming fluids, leading to the classification of...chemistry of tourmaline and scapolite associated with emerald and beryl, data from fluid and solid inclusions |  | Galbraith, C. G., Clarke, D. B., Trumbull, R. B., Wiedenbeck, M. (2009) Assessment of Tourmaline Compositions as an Indicator of Emerald Mineralization at the Tsa da Glisza Prospect, Yukon Territory, Canada. Economic Geology, 104 (5) 713-731 doi:10.2113/gsecongeo.104.5.713 | Journal (article/letter/editorial) | | of Tourmaline Compositions as an Indicator of Emerald Mineralization at the Tsa da Glisza Prospect, Yukon...Tourmaline is ubiquitous at the Tsa da Glisza emerald prospect, Yukon Territory, occurring as porphyroblasts...quartz-tourmaline veins. The principal occurrence of emerald is along contacts between the quartz-tourmaline...of using tourmaline compositions as a guide to emerald mineralization at Tsa da Glisza based on major...tourmaline compositions encompass Na-Fe schorl, Na-Mg dravite, and Ca-Mg uvite and show a strong dependence on |  | | Report (issue) | | our way through the compet itive minefield of emerald science, much of John's contribu tion to this...any other opinion. extraLapis English No. 2: Emerald The Most Valuable Beryl The Most Precious Gemstone...we âą pay tribute to John Sinkankas to whom this emerald issue is dedicated. John Sinkankas wrote more...than 15 books including his 1981 definitive work Emerald and Other Beryls. He set standards for authors...them. We are grateful to him and hope that you will see his influence here in Emeralds of the World and in |  | | Book | | mainland Tanzania) and then progressing to Kenya - I am proud to say that the coloured gemstones of these...and varied colours oftsavorite, tanzanite and dravite are related to trace quantities of vanadium, the...the Neoproterozoic Metamorphic Mozambique Belt (see box on page 15). This geological entity hosts the...sapphire,scapolite,spinal,tanzanite, âąâą tourmaline{dravite),tremolite,tsavorite, wurtzite,zoisite. (cp': ...S-sapphire D-diamond Sn-tin (cassiterite) E-emerald T -tourmaline Am- amethyst Mahenge sedimentary ⥠pl |  | Klemme, S., Marschall, H. R., Jacob, D. E., Prowatke, S., Ludwig, T. (2011) Trace-element partitioning and boron isotope fractionation between white mica and tourmaline. The Canadian Mineralogist, 49 (1) 165-176 doi:10.3749/canmin.49.1.165 | Journal (article/letter/editorial) | | Germany, and Swarovski & Co., Aâ6112 Wattens, Austria Thomas LUDWIG Institut fĂŒr Geowissenschaften,...major-element mineral compositions are given in Table 1 (see below). One thin section was chosen for in situ trace-element...trace-element and boron isotope analysis (for details, see below). Analytical Techniques Major elements Concentrations...reference tourmaline (98114: elbaite, 108796: dravite, 112566: schorl). Compositions of these tourmaline...reference tourmaline (98114: elbaite, 108796: dravite, 112566: schorl (Leeman & Tonarini 2001). The long-term |  | Trumbull, R. B., Garda, G. M., Xavier, R. P., Cavalcanti, J. A. D., Codeço, M. S. (2019) Tourmaline in the Passagem de Mariana gold deposit (Brazil) revisited: major-element, trace-element and B-isotope constraints on metallogenesis. Mineralium Deposita, 54 (3) 395-414 doi:10.1007/s00126-018-0819-z | Journal (article/letter/editorial) | | ARTICLE Tourmaline in the Passagem de Mariana gold deposit (Brazil) revisited: major-element, trace-element...Minas Supergroup metasedimentary units hosting the deposit. Keywords Gold deposits . QuadrilĂĄtero FerrĂfero...elements Introduction The Passagem de Mariana (PM) deposit is one of several auriferous deposits in the Ouro...first geological descriptions of the Passagem deposit in the 1800s, the spatial association of tourmalinite...for ore (e.g., Derby 1911). Most studies of the deposit, including these early works, considered it to |  | | Journal (article/letter/editorial) | | Element Geochemistry of Dayakou Vanadium-Dominant Emerald from Malipo (Yunnan, China): Genetic Model and...Geosciences Beijing, 29 Xueyuan Road, Haidian District, Beijing 100083, China; 2009170025@cugb.edu.cn...Abstract: Emerald from the deposit at Dayakou is classified as a vanadium-dominant emerald together with...emeralds and traced the genesis of the Dayakou deposit, there has not been any systematic comparison or...and the crystallization process of the Dayakou emerald remain controversial. In this study, both major |  | | Journal (issue) | | No. 3 / 2022 Emerald from Chitral, Pakistan Turquoise from Xinjiang, China Emerald Jewels from St...This emerald-bearing pectoral cross (12.5 Ă 5.8 cm) was donated to St Peterâs Archabbey in Salzburg, Austria...assumed the emeralds came from Austriaâs Habachtal deposit, microscopic examination and portable EDXRF chemical...this issue. Courtesy of St Peterâs Archabbey, Salzburg; photo by N. Urban. 213 Whatâs New Yehuda Diamond... Gem Notes 234 Emerald from the Chitral Region, Pakistan: A New Deposit Emerald with BertranditePhlogopite |  | | Journal (article/letter/editorial) | | 19 May 1995/Accepted: 3 January 1996 Abstract. Emerald deposits in Swat, northwestern Pakistan, occurring...and tourmaline (two samples) from the Mingora emerald mines. The oxygen isotopic composition (&180 SMOW)...n = 7). Each of the two components of water in emerald (channel and inclusion) has a different range of...7). The mean 6D of channel waters measured from emerald ( - 4 2 +_ 6.6~/oo SMOW) and that of fluid calculated...composition of magnesite, locally associated with emerald mineralization, is also very restricted (&13C~-3 |
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C adit, Emerald deposit, Leckbachgraben, Nasenkopf mountain, Bramberg am Wildkogel, Zell am See District, Salzburg, Austria