 | | Journal (article/letter/editorial) | | represents the culmination of two expeditions to Colombia and Ecuador in 1853 and 1857, inspired by the...January–February, 2016 The Emerald Mines of Colombia Thomas P. Moore The Mineralogical Record 2709...organics-rich sedimentary rocks in the Department of Boyacá in west-central Colombia. From the early 16th century...when Imperial Spain took over deposits at Chivor, Muzo and Cosquez, through the late 20th century, when...are on the rise and may someday catch up, but Colombia is still the source of 60% of all gem-quality |  | | Journal (issue) | | Appellation 16 The Second World Emerald Symposium in Colombia The Second World Emerald Symposium Focuses on...The Muzo Companies’ 10th Anniversary – A Decade of Change A New Era for the Historic Coscuez Mine Esmeraldas...More Exquisite Emeralds Magnificent Old Mine Emeralds 143 Mine Visit A Visit to Colombia’s “Green” Emerald...Thailand Board of Directors Gabriel Angarita, Colombia Saurabh Bansal, Germany Warren F. Boyd, Canada...Zoysa, Sri Lanka Advisors Jean Claude Michelou, Colombia Ruben Bindra, USA Immediate Past President Benjamin |  | | Journal (issue) | | EMERALD UPDATE Highlights of Bogota Symposium Colombia opened its arms to welcome the world’s leading...huge success with more than 300 delegates from Colombia and around the world taking part. More than 42...designers, traders and brand retailers. They visited the Muzo, Cunas, Pita and Chivor mines on the slopes of the...page: Rough emeralds mined by Gemfields at the Kagem mine in Zambia. (Photo courtesy of Gemfields) CONTENTS...Symposium Report and Presentations 42 6 16 17 18 20 Colombia Hosts First High-Level Global Emerald Symposium |  | Giuliani, G., France-Lanord, C., Cheilletz, A., Coget, P., Branquet, Y., Laumomnier, B. (2000) Sulfate Reduction by Organic Matter in Colombian EmeraldDeposits: Chemical and Stable Isotope (C, O, H) Evidence. Economic Geology, 95 (5) 1129-1153 doi:10.2113/gsecongeo.95.5.1129 | Journal (article/letter/editorial) | | are contained within two zones, the eastern and western emerald zones, in the Eastern Cordillera. Mineralizing...isotope composition range (δ18O = 17.8 ± 0.3‰). The western emerald zone contains carbonates with relatively...(17–23.8‰). In both emerald zones, 13C-depleted calcite points to thermochemical sulfate reduction by oxidation...limestones by the hydrothermal fluid) and induced calcite and pyrite precipitation. The oxygen and hydrogen...equilibrium with calcite and dolomite (eastern emerald zone: 7.7 < δ18OFluid < 12.8‰; western emerald zone: |  | | Journal (article/letter/editorial) | | calle 32, n ~ 1307, Bogotfi, Colombia Abstract. Emerald deposits of Colombia are confined to lower Cretaceous...stratabound mineralizations. Emerald occurs in calcite veins, veinlets, pockets and brecciated zones associated...contenue dans des veinules, veines et brrches fi calcite. Ces diffrrences majeures se retrouvent aussi au...de lutites qui sont englob6es par un ciment fi calcite et pyrite: br6ches de plus faible extension (...des cavit6s g6odiques associ6e au quartz hyalin, calcite II, codazzite (Ca, Ce, La) (Mg, Fe, Mn) (CO3)2 |  | | Journal (article/letter/editorial) | | S.A. , Calle 32, no. 13-07, Bogotà, A A 17521, Colombia Published online: 06 Jul 2010. To cite this article:...S.A., Calle 32, no. 13-07, A A 17521, Bogotá, Colombia Abstract Quadrupolar mass-spectrometric study...located on the eastern and western margins of the Eastern Cordillera of Colombia. Fluids in channels and...channels are higher by ~ 2 0 % in emeralds from the western group compared to those in the eastern deposits...lower (1.35 < H2O < 1.45 wt%) than in those of the western group (1.63 < H2O < 2.19 wt%), and it corresponds |  | | Journal (issue) | | HPHT-Grown Synthetic Diamonds Diamonds from the Letšeng Mine Fall 2015 VOLUME 51, No. 3 EDITORIAL 221 Trapiche...background, is carbonaceous shale containing veins of calcite, pyrite, and minute crystals of low-grade emerald...this method. Meanwhile, Lesotho’s Letšeng-la-Terae mine is currently enjoying a renaissance. Rising prices...Mathieu, Christophe Morlot, and Yannick Branquet Colombia is the traditional source of the world’s finest...exclusively in the black shales of the country’s western emerald zone, is linked to the peculiar structural |  | | Report (chapter) | | Bogotd, Colombia Abstract: The emerald deposits of Muzo and Coscuez hosted within the western flank of...Geological background The breccia occurs in both western and eastern mineralized zones located along the...along the Cordillera flanks. Both western zone deposits (e.g. Muzo and Coscuez) and eastern zone deposits...anticlinoriums. Located between the subduction-related Western and Central Cordilleras and the Llanos forelands...bedding-parallel veins (V1) filled with either fibrous calcite or fibrous pyrite also occurred during this stage |  | | Journal (issue) | | COVER: EMERALD crystal with calcite, 6.5 cm, from the Cosq uez mine, Colombia; found in 1998. Scott Rudolph............................................... 22 Mine Exploitation (or not) Today ......................represents the culmination of two expeditions to Colombia and Ecuador in 1853 and 1857, inspired by the...organics-rich sedimentary rocks in the Department of Boyaca in west-central Colombia. From the early 16th century...when Imperial Spain took over deposits at Chivor, Muzo and Cosquez, through the late 20th century, when |  | Giuliani, Gaston, Dubessy, Jean, Ohnenstetter, Daniel, Banks, David, Branquet, Yannick, Feneyrol, Julien, Fallick, Anthony E., Martelat, Jean-Emmanuel (2018) The role of evaporites in the formation of gems during metamorphism of carbonate platforms: a review. Mineralium Deposita, 53 (1) 1-20 doi:10.1007/s00126-017-0738-4 | Journal (article/letter/editorial) | | and Macanal, and the western belt including the mining districts of Yacopi, Muzo, Coscuez, La Pita and...different between the western and eastern belts (Branquet et al. 1999a). The Muzo and Coscuez deposits...belt, Colombia, 3.9 × 2.6 cm. Collection MultiAxes. b Association of emerald and quartz, Muzo mines,... western emerald belt, Colombia. c Emerald crystals on quartz and adularia, Panjshir Valley, Afghanistan...flakes of phlogopite in a marble matrix, Minh Tien mine, Luc Yen mining district, Vietnam, 2 × 1 cm. e Nodule |  | 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) | | Pauvres, BP 20, 54501 Vandœuvre cedex, France Department of Earth, Ocean and Atmospheric Sciences, University...Vancouver, BC V6T 1Z4, Canada; groat@mail.ubc.ca Department of Earth Sciences, Simon Fraser University, Burnaby...Austria); (IIB) Sedimentary rocks-black shale (Colombia, Canada, USA); (IIC) Metamorphic rocks (China...ct. Insufu rough emerald extracted from the Kagem mine in 2015. Lastly, on the 2th of October, the remarkable...extracted from the same mine [3]. Other giant crystals have been discovered in Colombia, such as el Monstro |  | | Journal (issue) | | 296 Photoluminescence Spectra of Emeralds from Colombia, Afghanistan, and Zambia D. Brian Thompson, Christian...synthetic star corundum, and the Colombian emerald mine-to-market industry. In our lead article, Drs. Sally...investigate the PL spectra of 48 samples from Colombia, Afghanistan, and Zambia. Their research strongly...CUBAGUA ISLA DE COCHE Costa Rica Panama Venezuela Colombia Brazil Ecuador El Amparo Chacopata Taguapire...Pinctada imbricata, industry in Venezuela and Colombia, with biological and ecological observations. |  | | Journal (article/letter/editorial) | | Yardley A. Cheilletz Emerald mineralisation in Colombia: ¯uid chemistry and the role of brine mixing ...March 2000 Abstract Emerald mineralisation in Colombia is located in two distinct zones along the borders...Cordillera, some 80 km apart. Mineralisation in the western zone has been dated at ca. 35 Ma whereas in the...¯uid inclusions contained in emerald, quartz, calcite, dolomite and ¯uorite from both zones, demonstrates...Because the same two ¯uids occur in both eastern and western zones, despite the dierence in space and time |  | | Journal (article/letter/editorial) | | Giuliani b, D.D. Marshall c, D. Turner a a b c Department of Earth and Ocean Sciences, University of British...BP 20, 54501 Vandœuvre-lès-Nancy Cedex, France Department of Earth Sciences, Simon Fraser University, Burnaby...it is difficult to obtain accurate statistics, Colombia supplies most (an estimated 60%, worth more than...there is speculation that the emerald mines in Colombia are becoming depleted. Brazil currently accounts...concentrate in the heavy mineral fraction. In Colombia, structural geology, the sodium content of stream |  | | Report (issue) | | emerald crystals from La Pita at Maripi, BoyacColombia valued at up to 1,000.00 US dollars per carat;...A 6.5 cm emerald specimen with calcite from Coscuez, Boyaca, Colombia. Bill Larson collection; Jeff Scovil...Wilson Whether from ancient India, Greece, Rome or Colombia, emeralds have always been a highly prized gemstone...CRPGICNRS in Vandoeuvre, France Colombia: Gonzalo Jara of Bogota, Colombia Africa: Federico Pezzotta from...Treatments: Ron Ringsrud of Saratoga, California 2 Colombia: The World's Top Producer .....36 Eastern Cordillera |  | | Book | | Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites: 57 Gem Pegmatites...Diamond Pipes: 129 The Diamond Deposits of Argvle, Western Australia Index 141 FOREWORD Each gem deposit-whether...chapters: hydrothermal deposits, with the emeralds of Colombia as an example; the pegmatites of Minas Gerais...Zabargad Island, Egypt and the new find at Argyle in Western Australia are used as examples. It is worth noting...thanks goes to Dr. Art Montana, Chairman of the Department of Earth and Planetary Sciences at UClA for his | | | Book | | Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites: 57 Gem Pegmatites...Diamond Pipes: 129 The Diamond Deposits of Argvle, Western Australia Index 141 FOREWORD Each gem deposit-whether...chapters: hydrothermal deposits, with the emeralds of Colombia as an example; the pegmatites of Minas Gerais...Zabargad Island, Egypt and the new find at Argyle in Western Australia are used as examples. It is worth noting...thanks goes to Dr. Art Montana, Chairman of the Department of Earth and Planetary Sciences at UClA for his |  | | Journal (issue) | | Cover Picture A crystal of emerald on calcite from Muzo, Colombia, from The Mineral Collection, Federal...Keeper of Minerals in 1953 he ensured that his department was well equipped for the rapid analysis of...Stevenson. This was a veritable mine of of inif one can have a mine for pearls. When formation - if I...was a slave. He killed his master and escaped to Western Europe and returned to England in 1604. Here he...1991,22, 6 334 Gem thaumasite from the Black Rock Mine, South South Mrica Africa Ulrich Henn, Markus |  | | Report (volume) | | Mineral Resources of Colombia (other than Petroleum) By QUENTIN D. SINGEWALD GEOLOGIC INVESTIGATIONS...PRINTING OFFICE, WASHINGTON i 1950 UNITED STATES DEPARTMENT OF THE INTERIOR Oscar L. Chapman, Secretary ...Emeralds...--------__ ____ ___________ __ ------Muzo mines__________________________-_____-----_---_-----_-Geography...mine________________________________-_______ Guayaquil mine ___________________________________________ Cau...ILLUSTRATIONS Page PLATE 5. Index map of part of Colombia, South America _______ In pocket 6. Map showing |  | | Journal (issue) | | ARTICLES An Update on Imperial Topaz from the Capio Mine, Minas Gerais, Brazil Daniel A. Sauer, Alice S....centuries. Today, the Capiio mine is one of the most productive in the region. This mine and the superb topazes...single copies or back issues to the Subscriptions Department. T o obtain a Japanese translation of Gems &)...Shane F. McClure-on Brazil's Cap50 Imperial topaz mine-is the type of locality project he would have pursued...Alice S. Keller, and Shane F. McClure T h e Capiio mine is one of the oldest and most productive fully mechanized |  | | Journal (issue) | | Stockton and D. Vincent Manson 80 Emeralds of Colombia Peter C. Keller NOTES AND NEW TECHNIQUES REGULAR...description of mining and marketing activities in Colombia, are discussed in Dr. Keller's article i n this...function of the Gemological Institute of America's Department of Research is the appliA cation of modem, advanced... (1979) Recent activities i n GIA's research department; clarification of composition of Maw-sit-sit... EMERALDS OF COLOMBIA By Peter C. Keller There has been more activity i n emerald mining i n Colombia in the |  | Giuliani, G., France-Lanord, C., Zimmermann, J. L., Cheilletz, A., Arboleda, C., Charoy, B., Coget, P., Fontan, F., Giard, D. (1997) Fluid Composition, δD of Channel H2O, and δ18O of Lattice Oxygen in Beryls: Genetic Implications for Brazilian, Colombian, and Afghanistani Emerald Deposits. International Geology Review, 39 (5) 400-424 doi:10.1080/00206819709465280 | Journal (article/letter/editorial) | | S.A. , Calle 32, no. 13-07, Bogotá, AA 17521, Colombia e Ecole Nationale Superieure de Geologie—Institut...MINERALCO S.A., Calle 32, no. 13-07, AA 17521, Bogotá, Colombia B. CHAROY,3 Ecole Nationale Supérieure de Géologie—Institut...pegmatites and greisens and emerald from Brazil, Colombia, a n d Afghanistan. An i m p o r t a n t c o n...number of occurrences and deposits in Brazil, Colombia, and Afghanistan. In Brazil, the deposits are...Zimmerman et al., 1994), Capoeirana and Belmont mine (Minas Gerais state), Tauá and Coqui (Ceará state) |  | | Book | | of the Stone in Myth and in Rock 9 3 From Mine to “Mine”: The Emerald Business 21 4 Emeralds in World...John) is one of the most mysterious figures in Western myth. His ancestry is uncertain, but some claim...could identify the country and sometimes the actual mine a particular stone came from. However, vaporizing...said came from Alexander the Great, hailed from Colombia in the sixteenth century. The researchers have...emeralds seem to be most plentiful in places like Colombia, Russia, Zambia, Zimbabwe, Pakistan, and Afghanistan |  | | Report (volume) | | Adularia-sericite gold deposits of Marmato (Caldas, Colombia): field and petrographical data BRANQUET, Y.,...troughs in Archaean volcanic rocks, Kambalda, Western Australia: indicators of early extension CLOKE...1984 having been appointed as a lecturer in the Department of Geology. In the intervening years, Dave carried...Distribution. MIRO, Lichfield. mineralization in Western Australia. Irish AssociaFITZGERALD, G., FEELY,... 12, 47-63. Compiled by P. N. Wyse Jackson, Department of Geology, Trinity College, Dublin 2. Fractures |  | Maughan, Edwin K., Zambrano O., Francisco, Mojica G., Pedro, Abozaglo M., Jacob, Pachon P., Fernando, Duran R., Raul (1979) Paleontologic and stratigraphic relations of phosphate beds in Upper Cretaceous rocks of the Cordillera Oriental, Colombia. Open-File Report Vol. 1979 (79-1525) US Geological Survey doi:10.3133/ofr791525 | Report (issue) | | UPPER CRETACEOUS ROCKS OF THE CORDILLERA ORIENTAL, COLOMBIA By Edwin K, Maughan U.S. Geological Survey and...4. 5. Major physiographic provinces in Colombia and western Venezuela*......................... Index...of Late Cretaceous paleogeographic elements in Colombia........... Correlation of sections of the Guadalupe...the vicinity of Azufrada^ Conchal, and Vanegas, Department of Santander........... Map showing La Luna Formation...formations from Bogota to the Maracaibo Basin, Colombia and western Venezuela.............................. |
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