 | | Journal (article/letter/editorial) | | COOK Department of Geosciences Auburn University Auburn, Alabama 36849 cookrob@auburn.edu Euclase La...La Marina Mine, Municipio de Pauna Boyacá, Colombia E uclase is a species whose beauty and rarity make...minerals after beryl and chrysoberyl. Exceptional euclase specimens appeared at the 2016 Tucson Gem and Mineral...selection of this issue’s Connoisseur’s Choice. Euclase, BeAlSiO4(OH), is a chemically simple nesosilicate...Lacking essential chromophores in its formula, euclase is ideally colorless with a white streak, but in |  | | 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...century, when Imperial Spain took over deposits at Chivor, Muzo and Cosquez, through the late 20th century...of emerald. In recent times, major specimens of euclase, parisite-(Ce), quartz, pyrite and dolomite have |  | | Journal (issue) | | Appellation 16 The Second World Emerald Symposium in Colombia The Second World Emerald Symposium Focuses on...Coscuez Mine Esmeraldas Santa Rosa: Our Wealth is Green Rediscovery and History of the Chivor Emerald...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 |  | Pignatelli, Isabella, Giuliani, Gaston, Morlot, Christophe, Rouer, Olivier, Claiser, Nicolas, Chatagnier, Pierre-Yves, Goubert, David (2017) Recent Advances In Understanding the Similarities and Differences of Colombian Euclases. The Canadian Mineralogist, 55 (4) 799-820 doi:10.3749/canmin.1700011 | Journal (article/letter/editorial) | | Grand Pont, Lausanne, Suisse ABSTRACT Colombian euclase is rare and associated with emerald in medium-temperature...original sources of euclase production were the mining districts of Gachalá and Chivor in the eastern emerald...in 2016 euclases were also found at the La Marina mine in the western emerald belt. The present study is...and mineralogical examination of zoned Colombian euclase sold on the gem market as ‘‘trapiche’’. Its texture...liquid, and vapor phases are also observed in the euclase, and their volume is identical to that of the inclusions |  | | Journal (issue) | | crystal with calcite, 6.5 cm, from the Cosq uez mine, Colombia; found in 1998. Scott Rudolph collection, ex............................................... 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...century, when Imperial Spain took over deposits at Chivor, Muzo and Cosquez, through the late 20th century |  | | 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...retailers. They visited the Muzo, Cunas, Pita and Chivor mines on the slopes of the Andean Mountains and...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 |  | | Journal (issue) | | 2022 Colombian Emerald Oddities Pink-Orange Euclase from Brazil Inclusions in Demantoid from Madagascar... Cover photo: Small quantities of pink-orange euclase from Bahia, Brazil, recently entered the international...displays an attractive colour not seen previously in euclase, and also occurs in well-formed crystals and hosts...Morlot, Lise Salsi and Gérard Martayan Pink-Orange Euclase from Bahia, Brazil 44 By Lætitia Gilles-Guéry...January 2021, the Government of South Australia’s Department for Energy and Mining issued a 36-page report |  | | Report (issue) | | Euclase BeAlSiO4 (OH) c 2001 ° Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point...Large crystals from the Gachal¶a mine, Las Cruces, near Chivor, Colombia. A number of other minor localities...Biscoe, J. and B.E. Warren (1930) The structure of euclase HBeAlSiO5 : Zeits. Krist., 86, 292{297. (3) Mrose...275{288. (4) Graziani, G. and G. Guidi (1980) Euclase from Santa do Encoberto, Minas Gerais, Brazil....Mineral., 65, 183{187. (5) Anderson, S. (1980) Euclase. J. Gemmology, 17, 18{29. (6) Hanson, A. (1985) |  | | Journal (article/letter/editorial) | | spodumene (kunzite, etc.), garnet, topaz, amblygonite, euclase, chrysoberyl (cat's-eye and alexandrite), sphene...and As we have made mention earlier, most of the mine production comes in Howard Pate, of the Fluorescent...We will arrange a visit to a producing tourmaline mine and visit dealers and miners. Two days will be spent...from here that occasionally a rare crystal of euclase is found. The beautiful and scarce Imperial topaz...time an optional stop in Bogota, Colombia and a visit to the famous Chivor emerald mines possibly could be |  | | Book (volume) | | Chalcopyrite) Cata Mine, Guanajuato, Mexico, 10 Adamite (Manganoadamite) Ojuela Mine, Mapimi, Durango,..., Morocco, 48-49 Apatite (with Bikitaite) Foote Mine, Kings Mountain, Cleveland Co., North Carolina,...Div., Myanmar, 22 Aphthitalite PCA Intrepid Potash Mine, Carlsbad, New Mexico, 22 Axinite (Magnesio-Axinite)...Pakistan, 7 Azurite (& Malachite) "Sams Pocket", Tsumeb Mine, Tsumeb, Namibia, 20-21 Bastnaesite (on Calcite)...Tourmaline) Paprok Mine, Nuristan Prov., Afghanistan, 33 Bismuthinite Biggenden Mine, Mount Biggenden, |  | | Book | | Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites: 57 Gem Pegmatites...chapters: hydrothermal deposits, with the emeralds of Colombia as an example; the pegmatites of Minas Gerais...thanks goes to Dr. Art Montana, Chairman of the Department of Earth and Planetary Sciences at UClA for his...photomicrographs of opal. The South Australia Department of Mines and Energy provided the photographs..., was responsible for photographs of the Argyle mine and the spectacular pink diamond. The Smithsonian | | | Book | | Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites: 57 Gem Pegmatites...chapters: hydrothermal deposits, with the emeralds of Colombia as an example; the pegmatites of Minas Gerais...thanks goes to Dr. Art Montana, Chairman of the Department of Earth and Planetary Sciences at UClA for his...photomicrographs of opal. The South Australia Department of Mines and Energy provided the photographs..., was responsible for photographs of the Argyle mine and the spectacular pink diamond. The Smithsonian |  | 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 |  | | Book | | CHEMICAL AND PHYSICAL PROPERTIES 90 Emerald Lore in Colombia and Peru, 5. 93 Crystal Structure Chemical...Proportions, Chile, 407 335 Polishing 359 361 Colombia, Laps and Agents, 336 407 Czechoslovakia, 13...by the noted were emerald made from green Department of Antiquities more extremely certain that... worked to were satisfy a the gems from Colombia only known source gained of emeralds. vigorous...north of Thebes. No emeralds exist the emerald mine through stones. Qift as as other mineral, |  | | Journal (issue) | | Picture A crystal of emerald on calcite from Muzo, Colombia, from The Mineral Collection, Federal Institute...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...1991,22, 6 334 Gem thaumasite from the Black Rock Mine, South South Mrica Africa Ulrich Henn, Markus...in South Africa. The locality is the Black Rock Mine in the Kalahari Manganese Field (Figure 1). That |  | | Book | | of the Stone in Myth and in Rock 9 3 From Mine to “Mine”: The Emerald Business 21 4 Emeralds in World...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...planet from Egypt to Afghanistan, from India to Colombia. In fact, ancient Colombian peoples, the Muzo |  | | Book | | Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San Diego County, California (8 inches) C Garnet...completely or largely unknown: beryl, tourmaline, euclase, tanzanite, tsavorite, sinhalite, etc. Fabulous... 16-17 Emerald .................. . 64-65 Euclase .................. . 68-69- 70-71 Garnet .....and sapphires much used in jewelry. A Ruby, Saul Mine, Tsavo Park, Kenya (0.8 inch) 8 Ruby, Longido, Tanzania...Madagascar and Mozambique. A Tourmaline, Queen Mine, San Diego County, California (5 inches) 8 Tourmaline |  | | Journal (issue) | | issue . . . A rarity in the gem and mineral world, euclase has sometimes fooled the unwary by its similarity...and the first paper describes a cut euclase from Chivor, Colombia, that not only resembles greenish-blue...those found in the more famous emeralds from the Chivor mine. The next two papers reflect the growing importance...1355-4565 J. Gemm., 1996, 25, 3,175-176 175 Euclase from Colombia showing three-phase inclusions J.M. Duroc-Danner... GG Geneva, Switzerland Abstract Gem quality euclase, a hydrated beryllium-aluminium silicate BeAlSiO4 |  | | Report (issue) | | emerald crystals from La Pita at Maripi, BoyacColombia valued at up to 1,000.00 US dollars per carat;...emerald specimen with calcite from Coscuez, Boyaca, Colombia. Bill Larson collection; Jeff Scovil photo Bottom:...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 |  | | Journal (issue) | | emeralds ; also brassy yellow pyrite crystals in both Chivor emerald (Plate B, 7) and fluorite (Plate B, 8)...mica platelets in peridot, hematite in diamond, euclase, corundum, quartz, and topaz (Plate B, 10), and...Well-developed crystals of pyrite in emerald from Chivor {Colombia). 8. Euhedral pyrite in fluorspar. 9. Well-defined...1). O n e of its scarce occurrences being Muzo, Colombia, its presence in emerald may well be considered...Slender prisms of parisite in emerald from Muzo {Colombia). 2. Idiomorphous prisms of apatite in mauve spinel |  | | Journal (issue) | | , 1983, XVIII, 6 FIG. 4. Sorting apparatus at mine location. (Photo by Laura J. Ramsey) The colour-distribution...produced some years ago by heating Brazil's Montezuma Mine stones. (We proposed the name 'peridine' for this...Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South...Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South...Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South Africa, Cobra Mine, Transvaal South |  | | Journal (article/letter/editorial) | | Canada, Madagascar, Russia, Ireland, Austria and Colombia. Emerald Mentioned in i he Bible In the Bible...referred to beryllus "like emerald." Ancient Emerald Mine in Egypt Cleopatra's emerald mines of Jebel Sikait...chromium) are the high point in gem values. Muzo, Colombia, Source of Fine Emeralds The flood of emeralds...torture. Muzo, where these emera'ds came from in Colombia, was rediscovered, by accident in 1558. The emeralds...output is still far below the demand. In one Colorado mine only one ton of beryl was produced to 30 tons of |  | | Journal (article/letter/editorial) | | Environments. Minerals 2021, 11, 513. https:// Department of Earth and Planetary Sciences, Harvard University...settings associated with sediments (type IIB; Colombia) or, more commonly, with magmatism and regional...2017-14.1, 2017-14.2, 2017-14.3 Ankadilalana emerald mine, Ambalahosy Nord Commune, Mananjary District, Vatovavy...9.3-1, 2017.9.3-2, 2017.9.3-3, 2017.9.4 Irondro mine, Andonabe Commune, Mananjary District, Vatovavy...5.2, RSA1, RSA2, RSA3, RSA4 Gravelotte Emerald Mine, Gravelotte, Murchison Range, Limpopo Province |  | | Book | | crystal 10.5 cm (41/i in. ) high from Tourmaline Queen Mine, San Diego County, Pala, California. Back Cover:...page 280. Page l: Left: The "Patricia Emerald," Colombia, 629 carats, 6.6 cm ( I ½ in.) high. Right: The...Octahedral Diamond Crystal in Kimber lite Premier Mine, Kimberley, South Africa On loan from Mrs Charles...an edge 65 Fluorite on Sphalerite 66 Elmwood Mine, Carthage, Tennessee Crystals 2.5 cm (1 ,n.) across... Paramelaconite with Footeite and Cuprite Copper Queen Mine, Bisbee, Arizona Largest crystal 7.5 cm (3 in.) |  | | Book | | 200 known here-holds the productive Mwadui diamond mine, known for Yeryfine, rare, pink diamonds. Emerald...Apatite 117 Beryl ll8 Diopside ll9 120 Enstatite 121 Euclase 122 Idocrase Iolite 123 Kornerupine 123 Moonstone...Williamson Mine and operations. 21 Figure 2.5. A 2. 9-carat pink diamond from the Williamson Mine. 25 Figure...crystal. 77 Figure 3.12. Umba, Tanzania, corundum mine. 42 Figure 6.3. Campbell Bridges. 78 Figure 3...(Maji Mota) Mine, Tanzania, emerald. 51 Figure 4.2. Map of the Manyara (Maji Mato) emerald mine, Tanzania |
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Chivor Mine, Chivor, Boyacá Department, Colombia