 | | 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) | | i e r. c o m / l o c a t e / o r e g e o r ev Emerald deposits and occurrences: A review L.A. Groat a...Available online 22 April 2008 Keywords: Emerald deposits Emerald occurrences Crystal chemistry Geochemistry...isotopes Classification Exploration A B S T R A C T Emerald, the green gem variety of beryl, is the third most...emeralds. However there is speculation that the emerald mines in Colombia are becoming depleted. Brazil...of world emerald production. Emeralds have also been mined in Afghanistan, Australia, Austria, Bulgaria |  | 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 δ11B...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) | | pp. 1835-1849 Emerald Mineralization during RegionalMetamorphism'The Habachtal (Austria)and Leydsdorp(Transvaal...ultrabasicrocks.Detailed studiesof the I-Iabachtal(Austria)and Leydsdorp(South Africa) emeralddepositsindicatethat...well-knownschist-hosted emeralddepositsof the Habachtal (Austria) and of Leydsdorp (Transvaal, SouthAfrica) have...0361-0128/89/997/1835-15$3.00 p.96) on the famousTakowaja emerald depositsin the Ural Mountains(USSR):"It is now...MORTEANI Petrologicand geochemicalstudiesof the emerald interlayeredserpentiniteswhichis calledthe Habach |  | | 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 • 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 (issue) | | North-West Branch: 1. Knight, F.G.A. South Yorkshire & District Branch: J. I. Platts, F.G.A. Examiners: B. W....1983, XVIII, 6 Knischka are not only very easy to see but are also a highly characteristic internal hall-mark...structure and relation to jeremejevite and fluoborite. Am. Miner., 61, 88-94. 3. Povarennykh, A. S., Clark...in the mica group; the biotite-phlogopite series. Am. J. Sci., 244, 836-48. [Manuscript received 25th...in the centre of the southern part of the state (see Map). Geologically, it is a volcanic area in a region |  | | 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-...Tanzania 96 Red Dravite Tourmaline from the Narok District, Kenya 99 Uvite-Dravite Chrome Tourmaline 99 |  | | Journal (article/letter/editorial) | | hematite, feldspars (microcline, orthoc'ase, albite, oligoclase, anorthite), quartz, mica (biotite, muscovite)...Can anyone supply information on the occurrence? District oí Columbia—On a recent visit to Washington, the...of graphic granite which comes from Bradbury's Mountain at Pownal, Cumberland Co. ; Opal (hyalite) colorless...quartzite have been collected in the Pilot Mountain district, Mineral Co., Nev. New Hampshire—A nice specimen...specimens of grayish-white cellular, felted masses of mountain leather (amphibole) occur in the Josephine mine |  | | Book | | Marshall, Anthony E. Fallick and Yannick Branquet Emerald Deposits: A Review and Enhanced Classification Reprinted...review proposed an enhanced classification for emerald deposits based on the geological environment (magmatic...one of the images (inclusions hosted in Russian emerald) for the cover page of this Special Issue book...A.; Marshall, D.; Fallick, A.E.; Branquet, Y. Emerald Deposits: A Review and Enhanced Classification....Paris-Lodron-University of Salzburg, Hellbrunner Str. 34, A-5020 Salzburg, Austria; franz.neubauer@sbg.ac |  | | Journal (article/letter/editorial) | | MINERALIUM DEPOSITA ©Springer-Verlag 1990 Origin of emerald deposits of Brazil G. Giuliani 1. 2 , L. J. H....R.M./SGM, Bahia, Brazil Abstract. Precambrian emerald deposits of Brazil are found in a typical geologic...and deformation. Emerald mineralization belongs to the classic biotite-schist deposit, which formed by...pegmatite-free emerald deposits linked to ductile shear zones are also known. Emerald formation is attributed...the important gemstones in terms of weight while emerald is characterized by its high commercial value and |  | | Journal (article/letter/editorial) | | the notable exception. KEYWORDS : gems, diamond, emerald, sapphire, ruby, geochemistry, exploration INTRODUCTION...sapphire (any other color of gem corundum), and emerald (green chromium/ vanadium-bearing gem beryl, Be3Al2Si6O18)...requirement for a major element and a chromophore is emerald. Beryl is a relatively rare mineral because there...form emerald (e.g. Ottaway et al. 1994; Cheilletz and Giuliani 1996; Branquet et al. 1999; SEE FIG. 1)...significant role in certain emerald deposits (notably Habachtal in Austria, Leydsdorp in South Africa |  | | Journal (issue) | | your professionalism will be obvious for all to see For further information please contact Louise Macdougall...result of a several weeks stay at Matara, which gem district he visited in response to an urgent request for...Singhal.); Swedish like English. "Purple-coloured Mountain Crystal." Robals: rauwa, rawa; granater. "Small...palingu; hvit crystall "Transparent and colourless mountain Crystal". WhiteSaphires or WaterSaphires: willie...fragments and slivers of the most transparent white mountain Crystals". Taripo: "a milk-coloured quartz". Yellow |  | | Book | | mainland Tanzania) and then progressing to Kenya - I am proud to say that the coloured gemstones of these...the Neoproterozoic Metamorphic Mozambique Belt (see box on page 15). This geological entity hosts the...S-sapphire D-diamond Sn-tin (cassiterite) E-emerald T -tourmaline Am- amethyst Mahenge sedimentary □ pl...For a Iist of East African type mineral species, see page 222. Burundi Of the five East African countries.../ND/AN Neoproterozoic Metamorphic Mozambique Belt (see box opposite). OCEAN Figure 8 Geographic map of |  | de Souza, J. L., Mendes, J. C., da Silveira Bello, R. M., Svisero, D. P., Valarelli, J. V. (1992) Petrographic and microthermometrical studies of emeralds in the ‘Garimpo’ of Capoeirana, Nova Era, Minas Gerais State, Brazil. Mineralium Deposita, 27 (2) 161-168 doi:10.1007/bf00197103 | Journal (article/letter/editorial) | | investigations in the area of the Capoeirana emerald deposit, Minas Gerais State, revealed two main lithostructural...mineralization metasedimentary-metavolcanic sequence. The emerald mineralization is dominantly concentrated within...Microthermometric studies of the fluid inclusions of the emerald grains indicate that crystallization occurred in...carbonate + biotite-phlogopite + chlorite of the emerald wall rocks. Francisco Craton. This observation...the mineral deposit of Itabira, discovered in 1978 S _ . . ~.~C/L~ -~4~ I~ The emerald 'garimpo' of |  | | 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) | | 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 |  | | Book (edition) | | series are also separately listed: andesine, oligoclase, labradorite, bytownite (series end-members albite...amphibole group). For more detailed information see "Dana's System of Mineralogy•· ( 1944, I 951, 1962)...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....abbreviations used are as follows: Mt. (mount or mountain), Mts. (mountains), R. (river), Is. (island),...other mineral mixtures, more detailed information see page 7 * valid mineral species in our opinion which |  | | 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 emerald—from its less ite, role of history’s 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 |  | | Book | | ADOLFSSON, STIG G. Hrudeposit, Sweden 3:38-39 Notes on recent underground collecting...ALABAMA Iron phosphate mineral locality at Indian Mountain, Alabama (by H. Harwood) 5:241-244 Iron-manganese...18:65-74 Phosphate microminerals of the Indian Mountain area [Georgia and Alabama] (by J.B. Gordon, Jr...the Alpine ar,d Subalpine region [Switzerland,Austria and Iti:Jy](by C. M. Gramaccioli) 8:287-293 Minerals...10:85-89 Micromounting in the eastern Alps of Austria (by K. Kotal) 13:171-173 ALSTONITE An occurrence |  | | Journal (issue) | | issue 2, 2009 I Vladimir I. Zhemakov URAL EMERALD MINES (Izumrudnye Kopi): Notes on Mineralogy Mineralogical...LOCAUTIES SERIES Vladimir Ivanovich Zhernakov Ural Emerald Mines: Notes on Mineralogy. Mineralogical Almanac...current issue dwells on Mineralogy of Ural Emerald Mines: a deposit which Russain geologists and mineralogists...Front Cover Photo Emerald President. 13.6 x 9.0 x 7.7 cm, weight 1172 g. Mariinskoe deposit 1993. The State...found and produced for 180 years, is known as Emerald Mines (on Russian - /zumrudnye Kop1). This happened |  | | Journal (issue) | | SPECIAL ISSUE December 2015 WORLD EMERALD UPDATE Highlights of Bogota Symposium Colombia opened its...world’s leading emerald experts from October 13-15. The First International Emerald Symposium was a huge...around the world taking part. More than 42 global emerald specialists from governments, labs and private...Fedesmeraldas, the Colombian Emerald Federation, and supported by all the country’s emerald-related bodies and...challenges and opportunities faced by the world’s emerald industry, including resource management, manufacturing |  | | Journal (issue) | | the World 22 Cover Stories Bemainty Sapphire Deposit in Madagascar Faces Multiple Challenges 46 54...Gemstone Association The sapphires of Bemainty. See Cover Stories, starting page 22. (Cover photos courtesy...Gemstone Association, ICA. Sapphires from a New Deposit at Bemainty near Ambatondrazaka in Madagascar ...Mizumura, Japan Alice Muthama, Kenya Stephan Reif, Austria Captain Ramji Sharma, Japan Pavel Sokolov, Russia...welcoming four new members, one from Italy and Austria and two from Germany. Here are several images from |  | | Journal (issue) | | Synthetic Ruby and Sapphire Cover photo: A new emerald deposit was discovered in 2021 in the Chitral region...description of pale-coloured emerald that was initially mined there (see The Journal, Vol. 38, No. 3,...Afghanistan and elsewhere in Pakistan. The Chitral emerald specimen shown here measures 12.5 cm tall. Photo...Shaokui Pan Comparison of Emeralds from the Chitral District, Pakistan, with other Pakistani and Afghan Emeralds...to advertising@gem-a.com. For more information, see https://gem-a.com/component/ edocman/media-kit. |  | | Journal (article/letter/editorial) | | The natural F-rich topaz is typically confined to (see Table 1): i) highly evolved felsic igneous rocks...Podpolom highsulfidation type epithermal gold deposit, Slovakia. Topaz: small, light grey patches in...granite from the Hub stock, Horní Slavkov-Krásno ore district, Czech Republic, with aggregates of polysynthetic...in the Hub Jo stock, Horní Slavkov-Krásno ore district, Czech Republic. Topaz occurs as irregular, anhedral...and 0 wt.% F. The diagram is a convenient way to see both of the mole fraction of OH (the complement |  | | Book | | prospectors by placer mining. It is found along the mountain ranges of the western states, including California...Australia at Kalgoorlie; in the Cripple Creek district, Teller Co., Colorado and in Calaveras Co., California...(Landsberg) in W. Germany. The most important economic deposit is at Almaden, Ciudad Real, Spain. In California...From Carn Brea. Cornwall 22 ETC hot-spring deposit at Steamboat Springs, Nevada. Large workable deposits...taken is Lolling, near Huttenberg, Carinthia, Austria; other localitiesarethe Harz Mountains, Saxony |
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Emerald deposit, Leckbachgraben, Nasenkopf mountain, Bramberg am Wildkogel, Zell am See District, Salzburg, Austria