 | | Book | | Gemstonesof Peru . TO ' ..J.O[_)(ON '\J./ITI1 KY Be-51 R~GAF-P5 f JaroslavHyrsl Gemstonesof...Gemstonesof Peru GRflnil © 2012 Text by Jaroslav Hyr~I © 2012 Photos by Jaroslav Hycll (166), Fidel Salinas...LARCO in Lima, No. 100184. 3: Andean opa/ from Acarí, rough 9 cm and beads 2 cm in diameter. Col!. J...Coll. Z. Rosales. Photo J Hyrsl. 6 Introduction Peru is a country rich in minerals, with numerous very...Crowley et al. (1997) and most recently in the book "Peru, Paradise of Minerals" (Hyrsl et al., 2011 ). N |  | Caucia, Franca, Marinoni, Luigi, Leone, Alberto, Ghisoli, Christian (2015) New physical, geochemical and gemological data of opals from Acari Mine (Arequipa Department, Peru) Neues Jahrbuch für Mineralogie - Abhandlungen Journal of Mineralogy and Geochemistry, 192 (1) 73-84 doi:10.1127/njma/2014/0272 | Journal (article/letter/editorial) | | gemological data of opals from Acari Mine (Arequipa Department, Peru) Franca Caucia, Luigi Marinoni,...compositional properties of some opals from Acari Mine, Peru, have been investigated through several methodologies...available in literature. XRPD analyses highlighted Acari Mine opals are CT types with variable contents of...distinct feature of the dark pink opals from Acari Mine is represented by the presence of β-carotenoid...Andean pink opals are similar to quincyite, the pink opal from Quincy (France) which is colored by organic |  | Fritsch, Emmanuel, Gaillou, Eloïse, Ostroumov, Mikhail, Rondeau, Benjamin, Devouard, Bertrand, Barreau, Alain (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16 (5) 743-751 doi:10.1127/0935-1221/2004/0016-0743 | Journal (article/letter/editorial) | | absorption in fibrous pink opals from Mexico and Peru EMMANUEL FRITSCH1,*, ELOÏSE GAILLOU1,2, MIKHAIL...(states of Mapimi and Michoacan) and Peru (Acari area, near Arequipa) are opalCT, containing from 10 to...palygorskite is deduced from that of its mixture with opal. The opal-CT–palygorskite–quinone association is a geological...lake environment in a volcanic region. Key-words: opal, optical absorption, nanostructure, Raman, palygorskite...of monodisperse spheres – which applies only to opal showing a play of colour (Sanders, 1964). Many opals |  | | Journal (issue) | | 27 No. 6 April 2001 Hte long sein Gemstoncs of Peru Gem quality clinohumite Colour of diamonds The...Longkin worksite, north of323 Pharkant mining district, northern Myanmar. This jadeite had a full green... Gemstones of Peru Dr Jaroslav Hyršl Kolin, Czech Republic ABSTRACT: Gem and ornamental stones from Peru are described...most economically important gems are blue and pink opal, chrysocolla and silicified chrysocolla. Properties...also described. Keywords: blue opal, chrysocolla, gemstones, Peru, pink opal Introduction A 323 lthough |  | | Journal (article/letter/editorial) | | wo]framite, 995. Pengenna mine, St. Kew: meneghinite, 424. South Terras mine, St. Stephen-in Brannel:...argentojarosite, li. WALES Benallt mine, Rhiw, Caernarvonshire: celsian, 508. Clogau mine, Dolgelly, ~ier.ionethshire:...ionethshire: tellurbismuth, 424. Vigra mine, Dolgelly, Merionethshire: tellurbismuth, 424. SCOTLAND Morar...e c h o s l o v a k i a (~eskoslovensko) Plavno mine, Krus'~ tlory, Bohemia: stannian andradite, 379...236. India Ellammankovilpatti, Tiruehirappali district, Madras : cordierite, kornerupine, phlogopite |  | | Journal (article/letter/editorial) | | micro-crystalline (C and CT) and non-crystalline (A) opal samples is here presented. The suite of the investigated...consists of the most important natural and synthetic opal samples, with a gemological significance, present...including both with and without play of color. The opal-C type is clearly identifiable on the basis of the...peak at about 620 cm–1, whereas the FTIR spectra of opal-CT and -A differ mainly for the position of the...Other phases, such as i.e. clay minerals, present in opal samples and related to different genesis and localities |  | | Journal (article/letter/editorial) | | 共XRPD兲 methodology, by analysing 75 new samples of opal came from different worldwide areas, is introduced...3478554兴 Key words: cristobalite, tridymite, opal C, opal CT, opal A, order-disorder, sepiolite, palygorskite...quartz, in different samples of common opal, fire opal, and wood opal. Levin and Ott 共1932, 1933兲 also highlighted...increasing interest of the scientific community about the opal crystallinity, several investigations were carried...unexplained how, in the same microcrystalline sample of opal, both the high- and low-temperature phases of cristobalite |  | | Journal (article/letter/editorial) | | shown by some blue specimens. Key words: gems, fire opal, spectroscopic analyses, trace elements, play of...the discovery of opal in the Brazilian area has been reported, even if white noble opal has been apparently...since 1945 (Bittencourt Rosa 1990). A transparent opal with green olive nuance and with some translucent... Among others we recall: common opal, white noble opal and fire opal from Pedro II (Bittencourt Rosa 1990...water-green opal from the state of Góias (Cassedanne & Ledoux 1992), common green opal and green opal cat’s-eye |  | | Journal (article/letter/editorial) | | minerals Article A Review of the Classification of Opal with Reference to Recent New Localities Neville...Abstract: Our examination of over 230 worldwide opal samples shows that X-ray diffraction (XRD) remains...for delineation and classification of opal-A, opal-CT and opal-C, though we found that mid-range infra-red...provenance. The corpus of results indicated that the opal-CT group covers a range of structural states and...At the one end are the opal-CTs that provide a simple XRD pattern (“simple” opal-CT) that includes Ethiopian |  | | Journal (article/letter/editorial) | | n o t i n c l u d e d i n t h i s i n d e x . Acari, Rio Grande do Notre, Brazil, Bismutotantalite,...classification of, lxv, 945. Andamoolca, South Australia, opal, 429. Andalusite, pseudomorphs of kyanite after...Bearpaw Mtns., Montana, pseudoleucite, 596. Benallt mine, Rhiw, Caernarvonshire, celsian, 508. Berek compensator...(S.), see SARBADHIKARI (T. n.), 770. Bhilwara district, ]~ajasthan, India, scorodite, 776. BmaAR (G....Norway, beryllian cordierite, 920. Black Mtn. district, Kern Co., California, powellite, 995. Book reviews: |  | Gaillou, E., Fritsch, E., Aguilar-Reyes, B., Rondeau, B., Post, J., Barreau, A., Ostroumov, M. (2008) Common gem opal: An investigation of micro- to nano-structure. American Mineralogist, 93 (11) 1865-1873 doi:10.2138/am.2008.2518 | Journal (article/letter/editorial) | | Mineralogist, Volume 93, pages 1865–1873, 2008 Common gem opal: An investigation of micro- to nano-structure EloïsE...The microstructure of nearly 200 common gem opal-A and opal-CT samples from worldwide localities was investigated...market for their intrinsic body color. Common opal-AG and opal-CT are primarily built from nanograins that...~25 nm in diameter. Only opal-AN has a texture similar to that of glass. In opal-AG, nanograins arrange...layers, or in some cases, radial structures. Common opal does not diffract light because its spheres exhibit |  | | Journal (article/letter/editorial) | | was undertaken to characterise opal-AG, opalAN (hyalite), opal-CT and opal-C, focussing on the Si-O fingerprint...spectroscopy shows that the three major IR bands of opal are split into transverse optical (TO) and longitudinal...non-destructive delineation of play of colour opals into opal-AG or opal-CT gems. We find that there are no special...features in the infrared spectrum that differentiate opal from silica glasses. Evidence is presented that...responsible for the structural differences between opal-AG, opal-AN and other forms of opaline silica. Complementary |  | | Journal (issue) | | located 31.5 km south of the city of Wroclaw in the province of Dolny Slask (Lower southwest Poland (Figure...nephrite jade production in the Jordanow Slaski district appears to have commenced in Neolithic times....of the regional geology of the [ordaruno Slaski district. J. Gemm., 2001, 27, 8, 461·470 western Europe...references to nephrite jade in the Jordanow Slaski district may be discerned in various 18th-century manuscripts...discoveries of nephrite jade in the Jordanow Slaski district. Acknowledgments I thank Antoni Stryjewski, |  | | Journal (issue) | | Cd-bearing phosphate mineral from the Gold Quarry mine, Eureka County, Nevada . . . . . . . . . . . . ...crystal cluster, 7.3 cm, from near Bapu, Guangdong Province, China. Rob Lavinsky specimen, now in the Tom...recovered from the dumps of this small mine. Local collectors reworked the mine dumps many times in search of...about 325 meters southwest of the Bishop manganese mine. The locality was early on referred to as a “copper...spatially distinct from the nearby Bishop manganese mine. The dumps do not contain significant manganese |  | | Journal (issue) | | ............................................ 44 Peru...................................................International Gemmological Institute, USA/Belgium; Cody Opal, Australia ; Richard and Mary Lou Osmond, Australia;...the production is mixed with calcite. The spinel mine at Kuh-i-Lal is being operated by a skeleton crew...only 1.5 tons a month prior to the purchase of the mine in 2001. Although material must still be mined mostly...blasting can destroy gem materials, the current mine owners have been able to increase manpower, thus |  | | Journal (issue) | | same crystal. 90 Play-of-Color Opal from Wegel Tena, Wollo Province, Ethiopia Benjamin Rondeau, Emmanuel...Gaillou Describes a major new source of high-quality opal with a mostly white bodycolor. Carat Points NOTES...Turquoise Gagan Choudhary 114 New Occurrence of Fire Opal from Bemia, Madagascar Martina Simoni, Franca Caucia...appearance in diamond • Chrysocolla chalcedony from Peru • Recent finds of kunzite in Pala, California •...the proximity to San Diego’s historic pegmatite district, we will offer field trips to working gem mines |  | | Report (issue) | | Contents 4 Map: Notable Opal Localities 50 BY BRUCE PAUL GABER 6 The Opal Enigma: Science, History...and Pins Afire: Play of Color in Opal BY MAX WEIBEL Sparkling Opal in Ancient Bones: Precious Relics...vibrant with opal pattern and color. In this extreme close-up of a Lightning Ridge black opal, the field...approximately 3 mm wide. Opal courtesy Jenni Brammall BY ALEX RITCHIE 52 An Opal Glossary of Terms BY...BY SI AND ANN FRAZIER BY PETER HUBER 64 Opal from Mexico: Unsurpassed Fire BY JURGEN SCHUTZ 18 Perfect |  | | Journal (issue) | | Stuart Smith Sunstone Labradorite from the Ponderosa Mine, Oregon Christopher L. Johnston, Mickey E. Gunter...largest producer of diamonds in 1990, t h e Argyle mine in Western Australia (36 million carats), fine gem-quality...et al., 1991). If we consider only the Kimberley mine ("Big Hole") as an example, and take into account...calculating the volume of rock removed from the Kimberley mine (the "Big Hole") in Kimberley, South Africa, the...County, in south-central Oregon; and the Ponderosa mine, in northwestern Harney County. The geology and |  | | Journal (issue) | | with strong blue/green dichroism • Peruvian blue opal • Interesting pearls from the North American West...Chatoyant glass cabochons from China • New synthetic opal varieties • Plastic imitations of a walrus tusk...beryl in the world: the Ruby Violet (or Red Beryl) mine in Utah’s Wah Wah Mountains. Shown here is a unique...ACCESS Dr. Pezzotta guided the senior author to the mine in July 2003. It is located about 140 air-km (87...to the GEMS & GEMOLOGY WINTER 2003 285 The mine is situated on a low hill (figure 4), at coordinates |  | | Journal (issue) | | May–June, 2017 Contents The St. Andreasberg Mining District, Western Harz Mountains, Niedersachsen, Germany...working in the lode” (Simonin, 1869). The Mining District Western Harz Mountains Niedersachsen, Germany...minrecord@comcast.net The geographically tiny St. Andreasberg District of silver mines has an outsized reputation: it...century after mining ceased in the St. Andreasberg District, the locality remains secure in its fame among...samsonite emerged from just two pockets in the Samson mine. St. Andreasberg is also known for its fine specimens |  | | Journal (issue) | | Mountains. By Tim Miller 34 THE TALE OF A TOURIST MINE A new life for Colorado’s Last Chance. 34 By Steve...Cover This bournonite specimen from the Herodsfoot mine (Lanreath, Cornwall, England) is a really fine example...Benitoite Mine Update I’d like to clarify some information about the California State Gem mine and about...about present-day access to the mine that was published in Bob Jones’ article Benitoite (June 2017). People...the benitoite mine is a patented mining claim and is private property. Accessing the mine without written |  | | Journal (issue) | | where found in large deposits, such as in the copper mine at Rio Tinto in south-western Spain, it is still...locations in Europe. Well-formed crystals also occur in Peru, Bolivia, Chile, Brazil, Japan and Mexico. 'Sand...from other examples are approximately twice the Peru have not been traced and it is possible diameter...précieuses. Paris 26. Exhibition Catalogue, 1990. Inca Peru, 3000 ans d'histoire. Musees Royaux d'Art et d'Histoire...Commentaries of the Incas and general history of Peru. University of Texas Press, Austin and London 29 |  | | Journal (issue) | | Jeremejevite from Myanmar and Sri Lanka • Pink opal from Peru • Prehnite from Australia and Mali • Unusual...corundum, emerald, tourmaline, alexandrite, and opal. However, without reliable and detailed analytical...emeralds were purchased or collected directly from the mine areas. The authors acquired the other samples at...localities. This 1.77 ct emerald from the Coscuez mine in Colombia was photographed together with the pyrite-bearing...from the Campos Verdes-Santa Terezinha mining district, Goias, Brazil. Journal of Gemmology, Vol. 26 |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahÌ mine in Bolivia, a major...instrumentation such as LA-ICPMS—once primarily the province of academia—became a fixture in many gemological...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...of the company (Even-Zohar, 2007). Because of the mine closures, De Beers’s market share by volume fell...pink diamonds (0.51 and 0.55 ct) from the Argyle mine in Australia were part of the 2007 Argyle pink diamonds |  | | Journal (issue) | | ruby and moonstone) photographed at the home of a mine owner in Mogok, Myanmar. Two field reports on Mogok...gem-producing area. 2. An Unusual Pink Opal focuses on a 0.27 ct faceted opal with an orangey pink body colour...icglabs.org. It describes a non-resin type synthetic opal by Kyocera, profiles petalite as a collector’s gem...from Vietnam, a stability experiment on Ethiopian opal, colour-change garnets from Tanzania showing the...48(1), 66–67. Blue Chrysocolla Chalcedony from Peru Gem Notes Microscopic examination revealed a polycrystalline |
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Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru