 | | 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 |  | | 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) | | GEMOLOGICAL INSTITUTE OF AMERICA Canada’s Diavik Mine Fabergé Imperial Bodyguards Responsible Sourcing...Production of Colored Stones Journey to the Chivor Emerald Mine Summer 2016 VOLUME 52, No. 2 EDITORIAL...EDITORIAL 103 Responsible Mining, a Trek to Chivor, and a Dash of Fabergé Duncan Pay FEATURE ARTICLES 104 ...Mining Diamonds in the Canadian Arctic: The Diavik Mine James E. Shigley, Russell Shor, Pedro Padua, Christopher... In Rainier’s Footsteps: Journey to the Chivor Emerald Mine Robert Weldon, Jose Guillermo Ortiz, and |  | | Journal (issue) | | staffing arrangements 125 THE CHIVOR EMERALD By PAUL W. C MINE JOHNSON O L O M B I A has five... There are two principal emerald districts in Colombia, M u z o and Ghivor. T h e M u z o district is...new mine has been discovered near Muzo. T h e Ghivor Mine, previously known as the Somondoco Mine, as...nearest town, is the only operating emerald mine in Colombia not controlled by the Colombian Government...situated in the township of Almeida, Department of Boyacâ, Republic of Colombia, South America. Located at approximately |  | | Journal (issue) | | Laboratory-Grown Diamond History of the Chivor Emerald Mine, Part II Optical Whitening and Brightening...Identification Techniques, and the Chronicles of Chivor Duncan Pay FEATURE ARTICLES 194 Naturally Colored...laboratory-grown diamond. 230 p. 255 History of the Chivor Emerald Mine, Part II (1924–1970): Between Insolvency...Blake Chronicles developments at the Chivor emerald mine in Colombia between 1924 and 1970, based on archival...Identification Techniques, and the Chronicles of Chivor Welcome to the Summer Gems & Gemology! This issue |  | | Journal (article/letter/editorial) | | bia. Even t h o u g h miners from the mines of Chivor, M u z o o r Coscuez recognize from experience...and western borders of the Eastern Cordillera of Colombia which corresponds, in its central part, to a fold...zone consists of the mining districts of Gachal~t, Chivor and Macanal; the western zone contains the districts...shale bedding and in the vicinity of albitites. In mine-scale terms, breccia planes are concordant with...likely interpretation for stratiform breccia in the mine area is that they represent thrust planes generated |  | | Report (issue) | | i UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PROJECT REPORT Colombia Investigations (IR)...ADJOINING AREA, j- ; % -:. :'..-' ":. .DEPARTMENT OF CUNDINAMARCA, COLOMBIA - ; _ r .' Donald H. MeLaughlin...(k^vernment of^ Colombia, and the, ,^~ Agency for International Development, ,O U."S» "Department-of State ... UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY PROJECT REPORT Colombia Investigations (IR)...ZIPAQUIRA QUADRANGLE AND ADJOINING AREA, DEPARTMENT OF CUDINAMARCA, COLOMBIA by Donald H. McLaughlin I. S. Geological |  | | Journal (issue) | | Luzonite • copper arsenic sulfide • Chinkuashih mine, Keelung, T a iw a n • 4x5 $ 5 0 .0 0 , 2x3 $ 2...from Verespatak, Rumania; copper from the Mohawk mine, Michi gan; cuprite (var. chalcotrichite) from...further slide displays of m /m s of some of the Foote mine, Kings Mtn., N orth Carolina minerals. Yedlin spoke...cussing the geology and mineral ogy of the Grandview mine, Grand Canyon, Arizona. He displayed some of the...locality. The new benstonite was found in the Minerva mine, Cave in Rock, Hardin County, Illinois. It occurs |  | | 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) | | Medal (gold) and gold-and-quartz specimen, Paymaster mine, Timmins, Ontario, Canada. Royal Ontario Museum...Brookite, Anatase, & Rutile from the Silver Link Mine, Ouray County, Ouray, Colorado, T. Rosemeyer, 327-30...R.B. Cook: Beryl, Variety Emerald, Chivor Mine, Chivor, Colombia, 332-34; Demantoid, Val Malenco, Sondrio...the world from PATACONIA ARGENTINA CONDOR AGATE] MINE OWNED See our article in Rock & Gem, issueMarch...Donovan 115- 19 Elpasolite, Virginia, 238 Emerald, Colombia, 332 Enargite, Colorado, 330; Utah, 378, 409 Equus |  | | 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...Sinkankas and Read 1981), and the deposits in Colombia, which are the principal source of the world's...Cretaceous basin within the Eastern Cordillera of Colombia (MeÂgard 1987; Schamel 1991). The Cordillera is...east are the major mining districts of GachalaÂ, Chivor and Macanal and in the west are the districts of |  | | 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 |  | | 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 |  | | 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 (article/letter/editorial) | | RODRIGUEZ** MINERALCOS.A.,calle32 nø 1307, Bogotd,Colombia Abstract Two Colombiandeposits belongingto the...95-64, Of. 410, Bogot&Colombia. 0361-0128/94/1554/361-2054.00 Gachalftand Chivor,and a westernbelt containing...sediments Fzc. 1. Geologythe two emeraldbeltsof Colombia(adaptedfromColletaet al., 1990). with emeralddeposicontrastwith...deposit. GeologicSetting The Eastern Cordillera of Colombia constitutes a o_ Q_ Cenomaman • .... 363...to the eastthe Llanosba- easternemeraldbelt of Colombia(modifiedfrom Forero, 1987). sinandto thewestthe |  | | Journal (article/letter/editorial) | | Jerome,United Verde mine (Wood, Michael M.) 5-6 729 Wherryite, Tiger, Mammoth mine (Mclean, W. John.)...Michel-Levy chart (GeologicalJournal, Geological Department,University of Liverpool.) Il-12 2t44 Practic...1518 Metastibnite, Copiap6, PampaLarga, Alacr6n mine (Clark,Alan H.) tt-t2 2ro4 Nitroglauberite,darapskite...PampaLarga,Alacr6n mine (Clark,Alan H.) 7-8 1338 Sphalerite,Copiap6, PampaLarga, Alacr6n mine (Clark,Alan H...(Kanamaru,F., et al.) 9-10 1550 Gibbsite, genesis,kaolinite (Gardner,LeonardRobert.) 7-8 1380 Layer silicates |  | | Journal (issue) | | HPHT-Grown Synthetic Diamonds Diamonds from the Letšeng Mine Fall 2015 VOLUME 51, No. 3 EDITORIAL 221 Trapiche...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...the emerald gastropods extracted from the Matecaña mine in Gachalà (Vuillet et al., 2002) and the famous...time to the genetic model of Colombian emeralds. Colombia offers a unique case because other gem trapiches |  | | Journal (issue) | | Madagascar • Orange sapphire from Greenland • Sweet Home mine rhodochrosite • New tourmaline find in San Diego...collected in 2015 by GIA gemologists at the Potentate mine at Rock Creek and from Cass Thompson’s mining operation...the Sapphire and Ruby Company of Montana, Ltd. to mine Spokane Bar. Given the worldwide interest being...ensuing years, several smaller operations continued to mine for sapphire along the gravel bars of the Missouri...Present-day mining includes operations of the Spokane Bar mine and Gold Fever Rock Shop (currently the largest |  | | 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 |  | | Journal (issue) | | 187 Peñas Blancas: An historic Colombian emerald mine R. Ringsrud and E. Boehm 251 Book review 254...Colombian emerald mine Ron Ringsrud and Edward Boehm Abstract: The Peñas Blancas emerald mine is part of Colombia’s...mines. This is the largest emerald district in Colombia, and it is the most productive and well-known...compares this historic mine to other famous producers in the region. Keywords: Colombia, emerald, geology...Chibcha and Muzo Indians, the emerald mines of Colombia have supplied the world with fine material for |  | | Journal (issue) | | Famous mineral localities: The Königskrone topaz mine, Schneckenstein, Saxony, Germany . . . . . . . ... Famous Mineral Localities: The Konigskrone Topaz Mine Schneckenstein, Saxony, Germany Helmut Leithner...property in 1727 and granted permission for others to mine topaz there, provided that they turned over to him...Record Library.) Figure 11. Topaz with quartz and kaolinite on matrix from Schneckenstein; plate 13 from Bauer’s...Topaz crystal, 1.4 cm, with quartz crystals and kaolinite, from Schneckenstein. Freiberg Mining Academy |  | | Journal (issue) | | the first paper describes a cut euclase from Chivor, Colombia, that not only resembles greenish-blue aquamarine...those found in the more famous emeralds from the Chivor mine. The next two papers reflect the growing importance...Gemm., 1996, 25, 3,175-176 175 Euclase from Colombia showing three-phase inclusions J.M. Duroc-Danner...of a medium-dark greenish-blue euclase from Chivor, Colombia, are described and compared with the properties...for one medium-dark greenish-blue stone from Chivor, Colombia, which looked very similar to aquamarine from |  | | Book | | Acknowledgements I am grateful to Brian Jackson of the Department of Geology, Royal Museums of Scotland who read...stone came from — some¬ times down to the actual mine. Today it is commonplace to see in sale catalogues...in Burmese ruby and spinel; emerald from Muzo, Colombia • chrome diopside in diamond • chromite in peridot...emerald. Other emeralds, including those from Colombia, are Inclusions in the major gemstones 13 ...crystal, a liquid and a gas bubble. Stones from the Chivor mines also contain very small plates of albite | | | Book | | ledgements I am grateful to Brian Jackson of the Department of Geology, Royal Museums of Scotland who read...the stone came from - sometimes down to the actual mine. Today it is commonplace to see in sale catalogues...in Burmese ruby and spinel; emerald from Muzo, Colombia • chrome diopside in diamond • chromite in peridot...emerald. Other emeralds, including those from Colombia, are Inclusions in the major gemstones 13 ...crystal, a liquid and a gas bubble. Stones from the Chivor mines also contain very small plates of albite |  | | Journal (article/letter/editorial) | | chemicar moder for the origin ofgibbsite from kaolinite Geological Journal' Georogicar Departmerilt, University...m b i a Jackson, K. A. Trapiche emeralds from Colombia; correction Jaffe, Howard. The composition field...Trapiche emeralds from Chivor and Muzo, Colombia Nassau, K. Trapiche emeralds from Colombia; correction Newalt...Fej11S1,and associatedminerals from the Silverfields mine. Cobalt. Ontario Tettenhorst, Rodney Implications |
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