 | | 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 (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 |  | | 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 (article/letter/editorial) | | Photographs January/February: Gold and quartz, Eagle's est mine, Placer County, California. Tana Daugharthy specimen...JeffScovil photo. May/June: Emerald with apatite, Chivor, Colombia. Melvin S. Hindin specimen, Harold and Erica...Papers in Specimen Mineralogy Acanthite, SilverKing Mine, Park City, Utah, R. B. Cook. 112-16 Afghanite...Q. Wight, 13S China, quartz. 118-23; Yaogangxian mine, 258 Chips from the Quarry, M. E. Huizing, 5, 85-87...New Find of Large Paramelaconite Crystals,A1gomah Mine, Ontonagon County, Michigan, S. M. Carlson, M. J |  | | 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) | | 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) | | 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...(Iettenhorst, Rodney, er a/.) 5-6 735 Colombia Mineralogy Emerald, trapiche, Chivor, Muzo (Nassau,K., et al.\ 3-4 |  | | Book | | Panagiotis Voudouris is Professor of Mineralogy at the Department of Geology and Geoenvironment, National and Kapodistrian...Professor in Economic Geology-Geochemistry, at the Department of Mineralogy, Petrology, Economic Geology, School...Afghanistan (Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso), Madagascar (Mananjary)...Šoštarić 5 and Vladimir Bermanec 2 1 2 3 4 5 * Department of Geosciences, Faculty of Sciences and Technology...University of Norway in Tromsø, N-9037 Tromsø, Norway Department of Geology, Faculty of Science, University of |  | | Journal (issue) | | 11.2 cm, from the La Marina mine, Muzo District, Boyaca Department, Colombia. See the article on the Colombian...Fort Victor ia, SonthArn Rhorl,,st'l. Bogota, Colombia. LAWRENCE H. CONKLIN 2 WEST 46th STREET , NEW...DENVER MART EXPO HALL ROOMJ53 BARITE 20.3 CM XIEFANG MINE , GANZHOU PREFECTURE , JIANGXI PROVINCE , CHINA...Comenius University, Faculty of Natural Sciences Department of Mineralogy and Petrology Ilkovifova 6, 842...1751 was funded mainly by donations from wealthy mine owners and from simple mining families. Modem times |  | | Journal (issue) | | % \ ' . / 1/ ■ l i ; BETAFITE Silver Crater Mine, near Bancroft, Ont., Canada Banks & Haefner Collections...Lochnan WORLD NEWS ON MINERAL OCCURRENCES FOSSIL DEPARTMENT—Conducted by jerry Case COLLECTING FLUORESCENT...two crystals of betafite from the Silver Crater Mine, near Bancroft, Ont., Canada. The single crystal..."Harold found his loose in the soil, and I found mine imbedded in a two-foot diameter apatite crystal...is a charge to collect at this mine, and it is a fair hike to the mine. Anything good, however, is always |  | | Journal (issue) | | recorded for natural emeralds from Brazil and Colombia^). The small variations from one facet to another...chromium to several tenths per cent ( 4 ). A recent Chivor emerald analysis^) shows 0-05% V, 0-12% Fe a n...e data have something in common with those of halloysite and the serpentine group of minerals. 229 FIG |  | | Journal (issue) | | Articles Famous mineral localities: the Taewha mine, K orea...........................................COVER: WULFENITE with mimetitefrom the San Francisco mine near Magdalena, Sonora, Mexico. The large crystal...Himalaya mine, Mesa Grande, California Tourmaline Queen mine, Pala, California Pala Chief mine, Pala, California...Ledge mine, Washington, California Benitoite Gem mine, San Benito Co., California U.S. Borax mine, Boron...Peacock mine, Virgin Valley, Nevada Hale-Norcross mine, Virginia City, Nevada Copper Queen mine, Bisbee |  | | Book (edition) | | directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone (+44)(0) 1865 843830; fax...First Edition For two decades, an earlier work of mine – Practical Gemmology – has proved a useful elementary...best-known gems from South America: the emeralds from Colombia. Emeralds occur at a number of sites north of...but none could be found sufficiently close in Colombia for this idea to be viable. Now it is thought...being prized from a vein in black shale at Chivor, Colombia elements have then joined other elements |  | | Book | | be addressed LO Thunder Bay Press, Editorial Department. at the above address. All other correspondence...(Peru). Almaden Is the oldest and largest mercury mine In the world. Hg Colour: t in-white Lustre; opacity:...de/ Pinto (Pinto silver) after the Rio Pinto in Colombia, it is also found at Nizhni Tagil and Norilsk...stannite when zinc-rich. Stannite is found at Etna Mine (South Dakota, USA), Seward Peninsula (Alaska, USA)...bornite and pyrite. Covellite is found at the Calabona mine (Sardinia) and Vesuvius (Italy), Salzberg (Austria) | | | Book | | be addressed LO Thunder Bay Press, Editorial Department. at the above address. All other correspondence...(Peru). Almaden Is the oldest and largest mercury mine In the world. Hg Colour: t in-white Lustre; opacity:...de/ Pinto (Pinto silver) after the Rio Pinto in Colombia, it is also found at Nizhni Tagil and Norilsk...stannite when zinc-rich. Stannite is found at Etna Mine (South Dakota, USA), Seward Peninsula (Alaska, USA)...bornite and pyrite. Covellite is found at the Calabona mine (Sardinia) and Vesuvius (Italy), Salzberg (Austria) |  | | Journal (issue) | | the “famous locality” series: the Home Sweet Home mine and Mount Antero. A fine mineralogical study of...“Missing and presumed lost” by the wellknown lost-mine author Kearney Egerton; “El Dorado’s children” by...continued to be added to our line-up in the Book Department, and many of them are difficult to obtain elsewhere...us instead. Why? Because profits from the Book Department go directly to the Mineralogical Record magazine...on lodes in California Gulch, and the Homestake mine (near Tennessee Pass) was reported to be shipping |  | | Journal (article/letter/editorial) | | Pearson3 DOI 10.1179/037174504225005285 1 Department of Geology, Royal Holloway, University of London... Zwirki i Wigury 93, 02-089 Warsaw, Poland 3 Department of Earth Sciences, Science Laboratories, South...Parnell1 DOI 10.1179/037174504225005311 1 Department of Geology & Petroleum Geology, University of...involves veining and hydrofracturing. At Rogerley Mine, centimetric Simplified geological map of the Alston...showing localities studied: 1. Tynebottom Mine; 2. Smallcleugh Mine; 3. Wellheads Hush; 4. West Rigg open-cut; |  | | Book | | illustrated Encyclopedi of the World’s Rocks and Mine re L A R E N MI OF THE WORLD Rudolf Duda and...0620 01371 12 16 3 SCIENCE AND TECHNOLOGY DEPARTMENT Digitized by the Internet Archive in 2022 with...Caucasus — crystals up to 1.5 cm (USSR), Getchell Mine — Nevada (USA) e Application: ore (extraction of...Sal-ammoniac — aggregation of crystals from pile of a coal mine; Kladno (Czechoslovakia — width of field 15 mm)...clean with distilled water eSimilar minerals: halloysite (34), illite, kaolinite (38) e Distinguishing |  | | Book | | the field, the home laboratory, and the operating mine or mill. Ultraviolet light, in the hands of geologists...of Mines. Arthur L. Flagg of the Arizona State Department of Mineral Resources offered the fruits of long...halos, 148 Chapter IX. ULTRAVIOLET LABORATORY IN MINE, MILL; AND Night mining in the open pit ... the...open-pit operation. Thus the famous Yellow Pine Mine operated night and day throughout World War II,...It could not be contaminated by uranium dust in mine workings nor damaged by seeping radon gas. It guided | | | Book | | ultraviolet’s many uses in the laboratory, and the operating mine or mill. field, the home Ultraviolet light, in...Arizona State fornia State Division of Mines. Department of Mineral Resources offered the fruits of long...rocks” locate orebody ULTRAVIOLET LABORATORY IN MINE, MILL, AND Night below mining in the open pit...open-pit operation. Thus Pine Yellow the famous Mine operated night and day throughout World War II,...It could not be contaminated by uranium dust in mine workings nor damaged by seeping radon gas. It guided | | | Book | | Caucasus - crystals up to 1.5 cm (USSR), Getchell Mine - Nevada (USA) •Application: ore (extraction of...- aggregation of crysta ls from pil e of a coal mine; Kladn o (Czechoslovakia - width of field 15 mm)...clean with distilled water• Similar minerals: halloysite (34), illite, kaolinite (38) • Distinguishing...Genesis: secondary• Associated minerals: illite, halloysite, kaolinite, quartz (534) • Occurrence: very common;...industries, cosmetics. Silicate Al 2 Si 2 O5 (OH) 4 Halloysite 34 IT] Named after 0. d'Halloy (1707-1789) |  | | Journal (issue) | | on Petra Diamonds by Jim Davidson, (3) the Karowe mine by John Armstrong of Lucara Diamond Corp., (4) the...Hardy P., 2013. Blue sapphires from the Baw Mar mine in Mogok. Gems & Gemology, 49(4), 223–232, http://dx...containing Mn3+ and Cu2+ were discovered at the Edoukou mine near Ilorin in Oyo State (Milisenda, 2001b; Milisenda...from only a few veins of the former MKZ feldspar mine (MKZ = Moravské keramické závody or Moravian ceramic...1954. High temperature phases from kaolinite and halloysite. American Mineralogist, 39, 193–207. Kammerling |  | | Book | | Consultants: Dr Alec Livingstone and Dr John Schumacher (Department of Earth Sciences, University of Bristol, England)...photographed by Martyn M ilner. In addition, t he Department of Earth Sciences, University of Bristol, supplied...13TL, Science Photo Library; 19TL, 22M & 41TL, Department of Earth Sciences, University of Bristol. Directory...63 United States Geological Survey; 57 & 99, Department of Earth Sciences, University of Bristol; 143...out of the water first. , .2.t'l UNDERSTAN DING MINE RALS HOVV MINERALS FORM Minerals are the natural |  | | Book | | anisotropy. (b) Twinned rock-crystals from the Otome Mine in Japan. According to the Japan Law (see Section...and J. F. C. Richards, Theophrastus On Stones, Colombia, Ohio State University, 1956 2 Pliny the Elder...Tracht changes of pyrite crystals from the Kanbe Mine depending on grain size between ore deposits ( )...and nacrite, are distinguished. In addition, halloysite, containing (OH) and H2O, belongs to this group...emerald and trapiche ruby In the Muzo and Chivor mines, in Colombia, calcite veins, in which emerald crystals |  | | Book | | Keweenaw area of north Michigan; at the Copper Queen mine, Bisbee, Arizona and at Georgetown, New Mexico....areas including Kimberley, Pretoria (the Premier mine is in this area), and Jagersfontein in the Orange...Localities. Lead is found in Sweden at the Harstig mine, Pajsberg; from the gold placers of the Ural Mountains...several localities in Chile, and from the Mohawk mine, Keweenaw County, Michigan; also from Lake Superior...rhodium and ruthenium. Localities. Choco area of Colombia and in the Ural mountains, USSR; in Aus¬ tralia |
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