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1-20 OF 59 RESULTS FOR
emerald
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Journal Article
Pressure-Temperature-Fluid Constraints for the Formation of the Halo-Shakiso Emerald Deposit, Southern Ethiopia: Fluid Inclusion and Stable Isotope Studies
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 22 February 2022
The Canadian Mineralogist (2022) 60 (1): 29–48.
...Carol-Anne Nicol; Dan Marshall; Hans Christoph Einfalt; Derek Thorkelson ABSTRACT The Halo-Shakiso emeralds were discovered near the town of Shakiso in southern Ethiopia in 2016. They are gem quality, Cr-dominant emeralds hosted within ultramafic rocks and associated with Cambrian pegmatite...
Journal Article
A Crystallographically Supported Equation for Calculating Water in Emerald from the Sodium Content
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2021
The Canadian Mineralogist (2021) 59 (2): 337–354.
...Rhiana E. Henry; Lee A. Groat; R. James Evans; Jan Cempírek; Radek Škoda ABSTRACT Emerald is the most well-recognized beryl (Be 3 Al 2 Si 6 O 18 ) variety, and although it has been extensively studied, a satisfactory method for quantifying the water content within the structural channels...
Journal Article
Exploring our current understanding of the geological evolution and mineral endowment of the Zimbabwe Craton
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2021
South African Journal of Geology (2021) 124 (1): 279–310.
.... Simplified geological map for Zimbabwe, showing the distribution of selected Archaean mineral deposits and occurrences, namely nickel, gold, volcanic-hosted massive sulphides, iron, emeralds, lithium and PGE’s. The Harare-Shamva Greenstone Belt is described in more detail to provide context...
Journal Article
Mineral chemistry and geochronology of the Rajasthan emerald deposits, NW India
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 15 June 2020
The Canadian Mineralogist (2020) 58 (3): 335–346.
...Paul Alexandre ABSTRACT The emerald deposits in Rajasthan, northwest India, are situated in a narrow NE–SW belt in the Aravalli Mountains. The studied deposits were formed by the metasomatic reaction between muscovite (± garnet ± tourmaline) pegmatites and lenticular bodies of altered ultramafic...
Journal Article
A new emerald occurrence from Kruta Balka, Western Peri-Azovian region, Ukraine: Implications for understanding the crystal chemistry of emerald
Gerhard Franz, Oleksii Vyshnevskyi, Michail Taran, Vladimir Khomenko, Michael Wiedenbeck, Ferry Schiperski, Jörg Nissen
Journal: American Mineralogist
Publisher: Mineralogical Society of America
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...
Journal Article
Study of the Differences in Infrared Spectra of Emerald from Different Mining Areas and the Controlling Factors
Xin Qiao, Zhengyu Zhou, Dietmar Theodor Schwarz, Lijian Qi, Jiaxin Gao, Peizhen Nong, Meng Lai, Kaipeng Guo, Yingbo Li
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 January 2019
The Canadian Mineralogist (2019) 57 (1): 65–79.
...Xin Qiao; Zhengyu Zhou; Dietmar Theodor Schwarz; Lijian Qi; Jiaxin Gao; Peizhen Nong; Meng Lai; Kaipeng Guo; Yingbo Li Abstract Natural emeralds from 11 mining areas were studied using an infrared spectrometer. The results showed different spectroscopic characteristics for emerald from different...
Journal Article
Why Are Some Crystals Gem QUALITY? CRYSTAL Growth Considerations On the “gem Factor”
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 521–533.
... single individuals. There are only a few examples of fast growth leading to gem-quality edifices: examples include “gota de aceite” Colombian emerald or the dendritic “pseudo cube” for gem diamonds. We have not documented the intermediate conditions between these two extremes in the Sunagawa diagram...
Journal Article
Genesis of Emerald-bearing Quartz Veins Associated with the Lened W-skarn Mineralization, Northwest Territories, Canada
Donald J. Lake, Lee A. Groat, Hendrik Falck, Thomas Mulja, Jan CempÍrek, Daniel Kontak, Daniel Marshall, Gaston Giuliani, Mostafa Fayek
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 561–593.
...Donald J. Lake; Lee A. Groat; Hendrik Falck; Thomas Mulja; Jan CempÍrek; Daniel Kontak; Daniel Marshall; Gaston Giuliani; Mostafa Fayek Abstract Emerald at the Lened occurrence in the western Northwest Territories is hosted by quartz veins cutting skarn near the Lened granite pluton and older...
Journal Article
Fluid Inclusion and Stable Isotope Constraints On the Formation of the Ianapera Emerald Deposit, Southern Madagascar
Stefano Salvi, Gaston Giuliani, Prosper Rakatovao Andrianjakavah, Bernard Moine, Didier Beziat, Anthony Fallick
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 619–650.
...Stefano Salvi; Gaston Giuliani; Prosper Rakatovao Andrianjakavah; Bernard Moine; Didier Beziat; Anthony Fallick Abstract The Ianapera emerald deposit is hosted in the Neoproterozoic Vohibory domain of southern Madagascar, within a tightly folded metamorphic sequence of mafic and ultramafic rocks (M...
Journal Article
Searching For the Garamantian Emerald: Reconsidering the Green-colored Stone Beads Trade in the Ancient Sahara
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 651–668.
..., 59), he proposed the term émeraude garamantique , the Garamantian emerald ( Duveyrier 1864 ). This term, however, does not refer to emeralds in the modern sense (a green variety of beryl), which were probably unknown to the Garamantes. After more than 150 years, the term Garamantian emerald...
Journal Article
Formational Conditions For the Binntal Emerald Occurrence, Valais, Switzerland: Fluid Inclusion, Chemical Composition, and Stable Isotope Studies
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 725–741.
...Dan Marshall; Nicolas Meisser; Sarah Ellis; Peter Jones; François Bussy; Thomas Mumenthaler Abstract Emerald from the Binntal occurrence in the Canton of Valais in Switzerland has been studied to determine its chemical zonation, stable isotopic signatures, depositional-fluid characteristics...
Journal Article
Recent Advances in Understanding the Similarities and Differences of Colombian Euclases
Isabella Pignatelli, Gaston Giuliani, Christophe Morlot, Olivier Rouer, Nicolas Claiser, Pierre-Yves Chatagnier, David Goubert
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 799–820.
...Isabella Pignatelli; Gaston Giuliani; Christophe Morlot; Olivier Rouer; Nicolas Claiser; Pierre-Yves Chatagnier; David Goubert Abstract Colombian euclase is rare and associated with emerald in medium-temperature hydrothermal veins hosted by Lower Cretaceous black shales (BS). The original sources...
Journal Article
Mineralogical and geochemical characteristics of emeralds from the Leydsdorp area, South Africa
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 359–378.
...J.E. Lum; K.S. Viljoen; B. Cairncross Abstract The world’s oldest emerald deposit occurs in the Gravelotte-Leydsdorp area of the Limpopo Province of South Africa. Emeralds have been mined from the main emerald working, the Cobra pit, since 1927, although emeralds were discovered in the area much...
Journal Article
FTIR spectroscopy of D 2 O and HDO molecules in the c -axis channels of synthetic beryl
Rudolf I. Mashkovtsev, Viktor G. Thomas, Dmitry A. Fursenko, Elena S. Zhukova, Vladimir V. Uskov, Boris P. Gorshunov
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2016
American Mineralogist (2016) 101 (1): 175–180.
... observed for the natural beryl in the range of the OD stretching vibrations have been explained. * E-mail: rim@igm.nsc.ru Manuscript handled by Ian Swainson 21 5 2015 21 7 2015 © 2016 Mineralogical Society of America 2016 Beryl emerald FTIR spectroscopy H 2 O, D 2 O...
Journal Article
Influence of impurities on Cr 3+ luminescence properties in Brazilian emerald and alexandrite
Journal: European Journal of Mineralogy
Published: 01 December 2015
European Journal of Mineralogy (2015) 27 (6): 783–792.
...Nadège Ollier; Yves Fuchs; Olivier Cavani; Adolf Heinrich Horn; Stéphanie Rossano Abstract Emerald and alexandrite, the chromiferous varieties of beryl, Be 3 Al 2 [Si 6 O 18 ], and chrysoberyl, BeAl 2 O 4 , respectively, are, as gems, of high economical and technological interest. The Cr 3...
Journal Article
Colombian-style emerald mineralization in the northern Canadian Cordillera: integration into a regional Paleozoic fluid flow regime
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 29 May 2013
Canadian Journal of Earth Sciences (2013) 50 (8): 857–871.
...M.L. Hewton; D.D. Marshall; L. Ootes; L.E. Loughrey; R.A. Creaser Abstract Emerald in the Mackenzie Mountains is hosted in extensional quartz–carbonate veins cutting organic-poor Neoproterozoic sandstones and siltstones within the hanging wall of a thrust fault that emplaced these strata above...
Journal Article
Granitic Pegmatites as Sources of Colored Gemstones
Journal: Elements
Publisher: Mineralogical Society of America
Published: 01 August 2012
Elements (2012) 8 (4): 281–287.
... the crystals. Emerald (the grass green, Cr- or Cr–V-rich variety of beryl) and alexandrite (the Cr- or Cr–V-rich variety of chrysoberyl) in “Urals-type” deposits, such as those in the Ural Mountains of Russia, the Kafubu area of Zambia, and the Mananjary area of Madagascar, are produced from...
Journal Article
Conditions for emerald formation at Davdar, China: fluid inclusion, trace element and stable isotope studies
Journal: Mineralogical Magazine
Published: 01 February 2012
Mineralogical Magazine (2012) 76 (1): 213–226.
...D. Marshall; V. Pardieu; L. Loughrey; P. Jones; G. Xue Abstract Preliminary geological work on samples from Davdar in China indicate that emerald occurs in quartz veins hosted within upper greenschist grade Permian metasedimentary rocks including quartzite, marble, phyllite and schist. Fluid...
Journal Article
Cr-bearing tourmaline associated with emerald deposits from Swat, NW Pakistan: Genesis and its exploration significance
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2010
American Mineralogist (2010) 95 (5-6): 799–809.
...Mohammad Arif; Darrell J. Henry; Charlie J. Moon Abstract Carbonate-talc altered ultramafic (and mafic) rocks of the obducted oceanic lithosphere along the Main Mantle Thrust in the Swat Valley host emerald deposits and are invaded by quartz veins and stockworks. Both the quartz veins and carbonate...
Journal Article
Conditions for Early Cretaceous Emerald Formation at Dyakou, China: Fluid Inclusion, Ar-Ar, and Stable Isotope Studies
G. Xue, D. Marshall, S. Zhang, T. D. Ullrich, T. Bishop, L. A. Groat, D. J. Thorkelson, G. Giuliani, A. E. Fallick
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 March 2010
Economic Geology (2010) 105 (2): 339–349.
...G. Xue; D. Marshall; S. Zhang; T. D. Ullrich; T. Bishop; L. A. Groat; D. J. Thorkelson; G. Giuliani; A. E. Fallick Abstract The Dyakou emerald occurrence is located in Malipo County in the province of Yunnan, southern China. The occurrence lies in the northern part of the Laojunshan-Song Chay...
GeoRef Thesaurus
emerald
Scope Notes: Variety of beryl.
Broader Terms:
See Also:
Use For Term:
smaragd