 | Abdel Gawad, Ahmed E., Ene, Antoaneta, Skublov, Sergey G., Gavrilchik, Alexandra K., Ali, Mohamed A., Ghoneim, Mohamed M., Nastavkin, Aleksey V. (2022) Trace Element Geochemistry and Genesis of Beryl from Wadi Nugrus, South Eastern Desert, Egypt. Minerals, 12 (2) 206 doi:10.3390/min12020206 | Journal (article/letter/editorial) | | Geochemistry and Genesis of Beryl from Wadi Nugrus, South Eastern Desert, Egypt Ahmed E. Abdel Gawad 1, * , Antoaneta...Geochemistry and Genesis of Beryl from Wadi Nugrus, South Eastern Desert, Egypt. Minerals 2022, 12, 206. https://doi...Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt; dr_mohamed1966@yahoo.com (M.A.A.); moh.gho@mail...occurs in the ancient Roman mines at Wadi Nugrus, South Eastern Desert of Egypt. It ranges from small crystals...The emerald of Wadi Nugrus has similarities with the geological setting of the Canadian emeralds. Emeralds |  | 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 |  | Aurisicchio, Carlo, Conte, Aida M., Medeghini, Laura, Ottolini, Luisa, De Vito, Caterina (2018) Major and trace element geochemistry of emerald from several deposits: Implications for genetic models and classification schemes. Ore Geology Reviews, 94. 351-366 doi:10.1016/j.oregeorev.2018.02.001 | Journal (article/letter/editorial) | | Manuscript Major and trace element geochemistry of emerald from several deposits: Implications for genetic...Vito, Major and trace element geochemistry of emerald from several deposits: Implications for genetic...pertain. Major and trace element geochemistry of emerald from several deposits: Implications for genetic...report the chemical composition of representative emerald crystals from some of the most important worldwide...ternary diagrams contributed to discriminate among emerald crystals from various deposits, which are included |  | | 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...and hope that you will see his influence here in Emeralds of the World and in future issues. Gloria & Gunther |  | | Journal (issue) | | FEATURE ARTICLES 464 Geology of Corundum and Emerald Gem Deposits: A Review Gaston Giuliani and Lee...of the geology and genesis of gem corundum and emerald deposits. p. 569 512 A Review of Analytical... 637 614 Geographic Origin Determination of Emerald Sudarat Saeseaw, Nathan D. Renfro, Aaron C. Palke...F. McClure The relative chemical diversity of emeralds from different deposits worldwide allows clear...GIA to make geographic origin conclusions for emeralds. p. 655 648 Geographic Origin Determination |  | | Book | | Dietrich Klemm Gold and Gold Mining in Ancient Egypt and Nubia Geoarchaeology of the Ancient Gold Mining...a joint project with the University of Assiut, Egypt, our attention was drawn to this aborted program...and ascribing them to the chronologies of Ancient Egypt and Nubia • Investigating the geology of ore deposits...out to spread far beyond the southern borders of Egypt and well into the Nubian territories of NE Sudan...which gold quartz ores previously collected from wadi sediments had been processed in the same way as |  | | Journal (article/letter/editorial) | | 799–809, 2010 Cr-bearing tourmaline associated with emerald deposits from Swat, NW Pakistan: Genesis and its...Rouge, Louisiana 70803, U.S.A. 3 Camborne School of Mines, The University of Exeter, Cornwall Campus, Penryn...abstraCt Carbonate-talc altered ultramafic (and mafic) rocks of the obducted oceanic lithosphere along the...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-talc altered rocks contain discrete grains and clusters of tourmaline |  | 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...authors (WW) discovered a major occurrence of emerald in the Finlayson Lake district of southeastern...showing occurs in complexly deformed metavolcanic rocks in the Yukon–Tanana Terrane, near their contact...contact with a mid-Cretaceous granitic pluton. The emerald crystals occur where quartz veins cut mica-rich layers...dipping mica schist of the Upper Devonian Fire Lake mafic metavolcanic unit. At least eight such veins have |  | | Journal (issue) | | Special Emerald 2018 – Issue 40 All About Colored Gemstones World Emerald Update Highlights of the...the Second World Emerald Symposium, Bogotá International Gemstone Association AColored Publication of the...Issue 40 ׀InColor 1 2 InColor ׀Special Emerald 2018 InColorMagazine.com; Gemstone.org International... Contents In Side 5 Special World Emerald Update Editor’s Note World Emerald Challenge: Origins and Appellation...Appellation 16 The Second World Emerald Symposium in Colombia The Second World Emerald Symposium Focuses on Responsible |  | | Show/Event (guide) | | of the region's famous mineral specimens. Superb Red Cloud wulfenites, Bisbee azurites, Old Yuma vanadinites...commerce roughly 5500 years ago. The Egyptian emerald mines at Wadi Sikait, now in ruins, testify to a long...Until the Colombian emerald deposits were taken over by Europeans in the 1500's, Egypt was the only known...known source of emeralds. And yet very few an cient Egyptian emeralds have sur vived in contemporary jewelry...distinctly possible that the ancient popularity of emeralds was re lated not as much to their orna mental |  | | Report (edition) | | available from: Information Centre Department of Mines and Petroleum 100 Plain Street East Perth WA 6004...dmp.wa.gov.au/GSWApublications Department of Mines and Petroleum Mineral Resources Bulletin 25 GEMSTONES...expanded to include additional occurrences of emerald, opal, agate, chalcedony, organic gems, tiger eye...FOR MINES AND PETROLEUM Hon. Sean K L’Estrange MLA ACTING DIRECTOR GENERAL, DEPARTMENT OF MINES AND...Subjects: Precious stones — Western Australia Mines and mineral resources — Western Australia Other |  | | Journal (article/letter/editorial) | | the notable exception. KEYWORDS : gems, diamond, emerald, sapphire, ruby, geochemistry, exploration INTRODUCTION...(C), ruby (red gem corundum, Al2O3), sapphire (any other color of gem corundum), and emerald (green chromium/...requirement for a major element and a chromophore is emerald. Beryl is a relatively rare mineral because there...and Gao 2003) but are concentrated in different rocks: chromium in dunite, peridotite, basalt, and their... interact with chromium-bearing ultramafic or mafic rocks. However, in the black shale–hosted Colombian |  | Franz, Gerhard, Vyshnevskyi, Oleksii, Taran, Michail, Khomenko, Vladimir, Wiedenbeck, Michael, Schiperski, Ferry, Nissen, Jörg (2020) A new emerald occurrence from Kruta Balka, Western Peri-Azovian region, Ukraine: Implications for understanding the crystal chemistry of emerald. American Mineralogist, 105 (2) 162-181 doi:10.2138/am-2020-7010 | Journal (article/letter/editorial) | | Mineralogist, Volume 105, pages 162–181, 2020 A new emerald occurrence from Kruta Balka, Western Peri-Azovian...Implications for understanding the crystal chemistry of emerald Gerhard Franz1,*, Oleksii Vyshnevskyi2, Michail...D-10623 Berlin, Germany 2 Abstract We investigated emerald, the bright-green gem variety of beryl, from a...compare its chemical characteristics with those of emeralds from selected occurrences worldwide (Austria,...(apfu) is valid; only some samples such as the emerald from Kruta Balka deviate from this value (2.944 |  | Andrianjakavah, Prosper Rakotovao, Salvi, Stefano, Béziat, 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...calcareous metasedimentary rocks, containing boudinaged metamorphosed mafic/ultramafic lenses, all intruded...within a few kilometers of the Ampanihy shear zone. Emerald mineralization is hosted by metasomatic phlogopite...veins, and bodies developed within the mafic/ultramafic rocks. Based on field and textural relationships |  | | Book | | material in this publication previously appeared in Rocks, Shells, Fossils, Minerals and Gems, Crytsal Identifier...Labradorite is associated with eruptive and metamorphic rocks. Above. Opal is hardened jelly found filling HEALING...HEALING DEFINED GEMSTONES the cavities in rocks. BY SCIENCE elegance and stability, contain the...| _— CRYSTALS Over 5,000 years ago in Ancient Egypt, the Pharaohs employed thousands of slaves to operate...operate the first commercial gemstone mines. — To this day, gemstones are sought after for their endurance |  | | Book (edition) | | in line with modern knowledge. In the cases of emerald and ruby and sapphire new sources of supply have...edition. Thanks, too, to De Beers Consolidated Mines Ltd, for the information on the Botswana diamond...xxi Preface to the Second Edition Consolidated Mines Ltd; Messrs Garrards Ltd (The Crown Jewellers);...the incorporation in this work of my articles on emerald, ruby and sapphire, and marble, as well as a number...Geology is the study of the planet Earth – its rocks, minerals and fluids, its systems and its processes |  | 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...greenschist-facies metavolcanic and ultramafic rocks and as crystals in granites, aplites, and quartz-tourmaline...occurrence of emerald is along contacts between the quartz-tourmaline veins and mafic country rocks, but it...of using tourmaline compositions as a guide to emerald mineralization at Tsa da Glisza based on major |  | | 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...and the Ministry of Mines and Energy, the symposium addressed the challenges and opportunities faced by |  | | Journal (issue) | | Chairman Clement Sabbagh Gemology Gem Quality Emeralds from Southern Ethiopia Members Jean Claude Michelou...mine-to-market, with detailed articles on the world’s mines right up through jewelry design and consumer market...Villegas, technical program manager for Pact’s Mines to Markets program. “This new GIA resource will...Considerations When Valuing Ruby, Sapphire and Emerald. Stuart Robertson, GIA GG - Spectacular Spectrums...Mitchell, FGA - Corals and Cameos…Gifts from the Sea. Eric Fritz, FGA Monday, August 14, 2017 - What’s |  | | Journal (issue) | | The Coscuez Mine: A Major Source of Colombian Emeralds Ron Ringsmd The Elahera Gem Field in Central...one of the most productive, if little known, emerald mines in Colombia is the Coscuez mine. The 14.52-ct...saturated bluish green color that is characteristic of emeralds from this locality, which lies only 10 k m from...its history, geology, mining activities, and the emeralds found there. Photo C 1986 Harold el Erica Van...MINE: A MAJOR SOURCE OF COLOMBIAN EMERALDS By Ron Ringsrud The Muzo emerald district, i n Boyacd, Colombia |  | 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) | | isotopic composition of tourmaline from the Mariinsky emerald deposit, Central Urals, Russia Ivan A. Baksheev...Mariinsky schisthosted emerald deposit in the Central Urals, Russia, both in emerald-bearing phlogopite veins...tourmaline is influenced by the host rocks (ultramafic and mafic rocks), associated minerals, and minerals...in exploration of emerald-bearing and emerald-free veins in schist-hosted emerald deposits. The δ11B...likely dominated from the granitic rocks surrounding the emerald belt. The narrow range of B-isotope |  | | Journal (article/letter/editorial) | | reaction zones between pegmatites and ultramafic host rocks. The most important gem-bearing granitic pegmatites...zones surrounding pegmatites that intrude mafic rocks Emerald (the grass green, Cr- or Cr–V-rich variety...Be-rich pegmatitic fluids with chromiumbearing mafic country rocks (Schwarz et al. 2002; Zwaan et al. 2005;...composition. Only rarely do pegmatite bodies of mafic or alkaline compositions (e.g. gabbro, nepheline...green elbaite tourmaline (Afghanistan, 12.33 ct), red-violet elbaite tourmaline (Brazil, 16.87 ct), blue |  | | Journal (issue) | | diamonds, in addition to Burmese rubies, Colombian emeralds, Kashmir sapphires and natural pearls. The Burmese...turquoise, along with carnelian, which is a brownish-red gemstone, as well as garnet. The Iranians may, in...Auction A model displaying items from Gemfields‘ emerald campaign. M ining firm Gemfields raised US$26...between October 29 and November 2. Showcasing rough emerald and beryl, the auction saw the sale of 902,000...uncertainty has not affected the achievable per carat emerald rough prices on a quality-for-quality basis. The |  | | Book | | it is usually found amongst unimpressive looking rocks? With few exceptions, minerals are not created,...ABOVE A selection of cut sapphires from Australian mines; sapphires are Australia's most profitable crystal...happens when the inlet or outlet of an inland lake or sea is altered by geological uplift and the resulting...this shown under the polarizing kyanite, are rocks which microscope, showing clearly contain mineral...wavelengths; these produce the colours of the spectrum (red, orange, yellow, green, blue, indigo and violet) |  | | Journal (issue) | | 264 J. Gemm., 1991, 22, 5 'Machingwe': A new emerald deposit in Zimbabwe Jan Kanis*, Charles E.S. Arps**...Geological and gemmological details of a promising new emerald deposit in the Mweza Range Greenstone Belt of southern...compared with data from Sandawana and other nearby emerald deposits. Introduction In May 1987 the first author...opportunity to pay a short visit to a newly discovered emerald occurrence in Zimbabwe, named 'Machingwe deposit'...dipping, (partly) tightly folded, generally schistose rocks. Their length may reach a few hundred kilometres |
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