 | | 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, |  | | Journal (article/letter/editorial) | | from South Baldface Mountain, North Chatham, Carroll County, and the Sugarloaf Mountain area, Grafton County...Government pit at Albany, the Iron Mountain quarries at Bartlett, Green Mountain near Effingham, and the Hamm...and Rutherford mine pegmatites, of the Amelia district, Amelia County, and as irregular grains replacing...replacing beryl at the Irish Creek tin deposit, Rockbridge County, Virginia. Well-formed crystals from the...reportedly reached 5 cm in length although the Amelia district is perhaps better known for micro-sized phenakite |  | 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...and chlorite schists. Tourmaline is intermediate schorl-dravite in the country rock and become increasingly...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 |  | | 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...bertrandite and bityite. Tourmaline crystals vary from schorlâdravite to Fe-rich dravite. In the model of evolution...albitized pegmatites, vigezzite, fersmite, emerald beryl, schorlâdravite, columbite, tantalite, Vigezzo Valley |  | | Report (issue) | | aquamarine); 19.6 cm high Shigar Valley, Skardu district, Northern Areas, Pakistan P hoto by Jeff Scovil...Beryl (variety Morganite) ·, Stak Nala, Skardu district, Northern Areas, Pakistan 4.6 cm wide; Collection....................................Page 80 Zagi Mountain: A Paradise for Rare-Earth Element Mineral Collectors...in Idar to arrange a flight to Kabul. Generally, I am cooler to mineralogical stimuli-the consummate professional-but...extreme contrasts in which one was as likely to see a new Mercedes-Benz as a caravan of 100 or more camels |  | | Journal (article/letter/editorial) | | ____________________ Alkali group Schorl Fluor-schorl âOxy-schorlâ* Dravite Fluor-dravite âOxy-draviteâ*...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...alkali-group tourmalines: fluor-dravite, fluor-schorl, âfluor-elbaiteâ and fluor-buergerite (Table 1)...tourmaline species evolve progressively from foitite to schorl to elbaite to âfluor-elbaiteâ to fluor-liddicoatite |  | 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 |  | 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 |  | | Report (issue) | | Discovery Stoppaniite Fabio Tamagnini Page 40 Emerald and Aquamarine in Canada Lee A. Groat Page 22...are widely used (see page 22). These include aquamarine, red beryl, morganite, emerald, goshenite, and...varieties emerald and aquamarine are surrounded by the ancient mysticism of birthstones. Emerald, aquamarine...smaragdus" referred to what would be known today as emerald; "beryllus" is the Latin term for beryl; "sea green...of emerald, the modern designations for the beryl varieties emerged much later than did "emerald" and |  | | Book | | undertake the task of abridging my much larger book, Emerald and Other Beryls (Chilton Book Co, 1981) to provide...literature, Mr Readâs task was far from simple and I am most grateful for his discriminating selection of...xiii Chapter 1 Emerald and beryl in antiquity 1 Emerald in ancient Egypt 1 Emerald and beryl in ancient...10 Large European emerald objects 13 The Emerald Buddha 14 The Budhaâs tooth emerald 15 Hernando Contez...use of beryls in the Americas 15 Chapter 2 Emerald and beryl in medieval and modern Europe 18 Biblical |  | | Journal (issue) | | to 4 cm, on matrix, from Ghundao Hill, Mardan district, Pakistan. F. John Barlow collection; photo by...Another Mineral Video M ail-order shoppers who like to see what theyâre ordering now hav< a new source. Readers...concise. This is a very pleasant, inexpensive way to see and perhaps bu some fine minerals during those house-bound...inch, $3.50â etc.) W ouldnât it be interesting to see what thos specimens actually looked like? But even...even videos from ten or 20 yeai ago would be fun to see. In any case, I highly recommend th< collectors, |  | | Journal (article/letter/editorial) | | one of the worldâs major emerald-producing countries. In this study, emerald samples from Kamakanga, Zambia... magnetite, ilmenite); or schorl. The common paragenetic mineral is schorl. Other mineral inclusions...creativecommons.org/licenses/by/ 4.0/). 1. Introduction Emerald is a variety of beryl whose ideal formula is Be3...[4], but it is difficult to distinguish Zambian emerald from others with the naked eye, just by color....earned $21.5 million, including a 6100 carat rough emerald. Consequently, Zambian emeralds have great promising |  | 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 |  | 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...data. The tourmaline compositions encompass Na-Fe schorl, Na-Mg dravite, and Ca-Mg uvite and show a strong |  | | Book | | undertake the task of abridging my much larger book, Emerald and Other Beryls (Chilton Book Co, 1981) to provide...literature, Mr Read's task was far from simple and I am most grateful for his discriminating selection of...Chapter 1 Emerald and beryl in antiquity xiii 1 Emerald in ancient Egypt 1 Emerald and beryl in...Pliny's Natural History 10 Large European emerald objects 13 The Emerald Buddha 14 The Budha's tooth emeraid...use of beryls in the Americas 15 Chapter 2 Emerald and beryl in medieval and ~odern Europe 18 Biblical |  | 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...tourmaline (98114: elbaite, 108796: dravite, 112566: schorl). Compositions of these tourmaline samples are...tourmaline (98114: elbaite, 108796: dravite, 112566: schorl (Leeman & Tonarini 2001). The long-term reproducibility |  | | Book | | a few such specimens have been found after 1960 (see the Amity-Edenville entry for Edenite and Spine!)...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...to 2 cm which are pseudomorphs after bastnasite--see photo in Guastoni, Pezzotta and Zorzi (2008). ILMENITE...euhedral, pale tan to white rnicrocline crystals-see photos in Dupuis and David (2013). ffighway 5 extension...molybdenite specimens showing crystals to 6 cm (see this entry for Molybdenite), and in a second roadcut |  | | 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 |  | | 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 |  | 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) | | The Netherlands GEOLOGICAL SETTING OF ZAMBIAN EMERALD DEPOSITS A.S. SLIWA and C.A. NGULUWE Zimco Limited...setting of Zambian emerald deposits. Precambrian Res., 25 : 213--228. The Kafubu emerald deposits occur within...sometimes within the quartz--tourmaline veins. The emerald fields are considered comparable in quantity and...South Africa and Zimbabwe. INTRODUCTION The emerald deposits o f Zambia are located immediately southwest...the Kafubu emerald fields. These occurrences represent the most recently discovered emerald fields of |  | 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 |  | | Book | | EMERALD and OTHER BERYLS by JOHN SINKANKAS This is Beryls jewelers, gists, geologists, earth ...sciences, yet eminently facet and widely a Emerald historians, gemological Sinkankas, the permanent...metal beryllium. with Beginning author traces emeraldâfrom its less ite, role of historyâs pendix...Unmatched third is knowledge from author one emerald cutting and of exotic composition, physical...mineralogical once events. languages for beryl emerald logical to and part, Sinkankas explores and |  | | 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 |  | | Journal (issue) | | from the C en ten n ia l Eureka m in e, T intic district, Juab C ounty, U ta h ..........................Mineral Show in the "David P. Wilber Reunion" case (see W hat's new in minerals, this issue). Photo by Jeffrey...traveling on the backs o f donkeys to isolated mountain communities. He later served in the Puebla legislature...search them out anyway, hoping to find that rare deposit which will yield som ething more than ju st another...end o f the Wallapai Mining District. The major mining centers of the district included Cerbat, Chloride |
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