 | Lynch, E. P., Costanzo, A., Feely, M., Blamey, N. J. F., Pironon, J., Lavin, P. (2014) The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological perspectives. Mineralogical Magazine, 78 (7) 1571-1587 doi:10.1180/minmag.2014.078.7.04 | Journal (article/letter/editorial) | | Vol. 78(7), pp. 1571â1587 The Piteiras emerald mine, Minas Gerais, Brazil: fluid-inclusion and gemmological...gemquality faceted emeralds from the Piteiras Mine, Minas Gerais, Brazil. These data complement those of Rondeau...al. (2003) who also presented analyses of the Piteiras emeralds. Emeralds are found typically as euhedral-to-anhedral...006 0.008) and speciďŹc gravity (2.65 2.78), the Piteiras emeralds fall within the expected range for metasomatic...EY WORDS : Emerald, Brazil, gemmology, ďŹuid inclusions, microthermometry, Piteiras. Introduction EMERALD |  | 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) | | emerald deposits. Generally speaking, emerald is beryl with sufficient concentrations of the chromophores...sub-types hosted in: (IA) Mafic-ultramafic rocks (Brazil, Zambia, Russia, and others); (IB) Sedimentary...sub-types hosted in: (IIA) Mafic-ultramafic rocks (Brazil, Austria); (IIB) Sedimentary rocks-black shale...Emerald is the green gem variety of the mineral beryl, which has the ideal formula of Be3 Al2 SiO18 ....ct. Insufu rough emerald extracted from the Kagem mine in 2015. Lastly, on the 2th of October, the remarkable |  | | Journal (issue) | | INSTITUTE OF AMERICA Emeralds from Northeastern Brazil Diamantine: Coated Cubic Zirconia Precision Measurement...the Fazenda Bonfim Region, Rio Grande do Norte, Brazil J. C. (Hanco) Zwaan, Dorrit E. Jacob, Tobias Häger...Polished emeralds from this deposit in northeastern Brazil, discovered in 2006, typically display a saturated...from Pakistan ⢠Catâs-eye emerald from Belmont, Brazil ⢠Meteorite watches ⢠Purple common opal from Mexico...of the publisher. About the Cover For decades, Brazil has been one of the worldâs major sources of fine |  | | Report (issue) | | extraLapis English No. 2: Emerald The Most Valuable Beryl The Most Precious Gemstone Publisher Lapis International...ISBN 3-921656-58-3 Emerald The Most Valuable Beryl; the Most Precious Gemstone ------------ extraLapis... USA About Emeralds Emeralds¡ of the World Beryl and Emerald: Words from India ......4 A brief etymology...Mineralogically a Beryl ........10 Composition, structure, crystal habit, green beryl and trapiche emerald...emerald Rupert Hochleitner Brazil: Minas Gerais, Bahia, Ceara, Goias and Tocantins . . . . . . . . . . |  | | Journal (issue) | | Decade of Change A New Era for the Historic Coscuez Mine Esmeraldas Santa Rosa: Our Wealth is Green Rediscovery...More Exquisite Emeralds Magnificent Old Mine Emeralds 143 Mine Visit A Visit to Colombiaâs âGreenâ Emerald...Origins and Appellation President Clement Sabbagh, Brazil Vice Presidents Damien Cody, Australia Nirmal Kumar...Kumar Bardiya, India Treasurer Marcelo Ribeiro, Brazil Secretaries Bruce Bridges, USA Santpal Sinchawla...acquiring the majority stake in the iconic Coscuez mine in Colombia. The 2015 Symposium focused on the governmentâs |  | | Journal (issue) | | Pearl Testing 36 Emeralds from South America â Brazil and Colombia 48 Clinohumite â The Mountain Fire...rise of new economies such as China, India, and Brazil. The challenges have been numerous as these new...every ICA member, I would like to thank the IBGM in Brazil along with every company, individual, and government...Opening a Tsavorite Mine T anzaniteOne Limited is working towards opening a tsavorite mine not far from its...Tanzania, about 20 kilometers from its tanzanite mine. The project has a total indicated resource of 1 |  | | Journal (issue) | | diamond mine, the worldâs largest source of diamonds by volume. 42 Hydrothermal Synthetic Red Beryl from...Ludmila N. Demianets Grown to mimic the beautiful red beryl from Utah, this synthetic can be identified by its...Unusual andradite garnet ⢠Synthetic apatite ⢠Beryl-and-glass triplet imitating emerald ⢠Diamond with...Benitoite mine sold ⢠Emeralds from Laghman, Afghanistan ⢠Emeralds from Piteiras, Brazil ⢠Educational...âclose-upâ map shows the location of the three main mine sites discussed in this article: Kormos, Oxbow, |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By AurĂŠlien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...aquamarine, 1.12 ct Imperial topaz and 4.84 ct golden beryl. Courtesy of John Dyer Gems; composite photo by...blood ruby, royal blue and cornflower sapphire, old mine/ Muzo green emerald, sunrise and sunset padparadscha...The source of much of this pyrite is the Huanzala mine in west-central Peru, which has probably yielded |  | | Journal (issue) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x...described two topaz cat'seyes, one blue of 7.98 ct from Brazil and another colourless of 12.20 ct from Sri Lanka |  | | Book | | BARTORELLI ::⢠. . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA Š...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite |  | | Journal (issue) | | ARTICLES 260 An Update on âParaĂbaâ Tourmaline from Brazil James E. Shigley, Brian C. Cook, Brendan M. Laurs...on amethyst, citrine, and ametrine from the AnahĂ mine, Bolivia ⢠âCopalâ resin from Madagascar ⢠Iolite...corundum from Wyoming ⢠Green kyanite from Bahia, Brazil ⢠âRuby Rockâ cabochons ⢠Tourmaline from Warner...More recently, Brendan has visited Madagascar and Brazil to obtain first-hand knowledge of important gem...of gemological topics: âParaĂbaâ tourmaline from Brazil, spessartine garnet from California, Malaya garnet |  | | Book | | of the Stone in Myth and in Rock 9 3 From Mine to âMineâ: The Emerald Business 21 4 Emeralds in World...including large crystals of quartz, feldspar, mica, and beryl. Because pegmatite is such a rich source of rare...could identify the country and sometimes the actual mine a particular stone came from. However, vaporizing...attractive beryl family. The word âberylâ comes from the Greek berullos, meaning âcrystal.â Beryl in turn...them red and blue, respectively.) Emeralds and beryl were first recognized to be one and the same mineral |  | | Journal (article/letter/editorial) | | B S T R A C T Emerald, the green gem variety of beryl, is the third most valuable gemstone (after diamond...emerald mines in Colombia are becoming depleted. Brazil currently accounts for approximately 10% of world...analyses of beryllium, most published analyses of beryl are renormalized on the basis of 18 oxygen and 3...monovalent cation for a vacancy at a channel site. Beryl is relatively rare because there is very little...Exploration for gem beryl could result in the discovery of new occurrences of non-gem beryl or other Be minerals |  | | Journal (issue) | | Ellendale diamond mine opens ⢠Aquamarine and spessartine from Tanzania ⢠Brown beryl from Mozambique â˘...⢠New morganite mine in Madagascar ⢠Namibian gem localities ⢠New opals from Brazil ⢠Bicolored spessartine...spessartine from Brazil ⢠Pink/yellow spodumene from Afghanistan ⢠Glass imitations encountered in Namibia...diamonds shown here are from Canadaâs Ekati Diamond Mineâ˘, which started production in 1998. The necklace...and the staff of Amsterdam Sauer Rio de Janeiro, Brazil RTL TRIBUTE GEMS & GEMOLOGY FALL 2002 207 |  | | Book | | Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted from: Minerals 2019, 9, 233, doi:10.3390/min9040233...Province (BPP) from Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite is classiďŹed...bluish-green to green to yellowish-green variety of beryl coloured by chromium and sometimes vanadium. The...sources (i.e., Afghanistan (Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso),...Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil. Minerals 2019, 9, 233. [CrossRef] Huong, L.T.-T |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahĂ mine in Bolivia, a major...of the company (Even-Zohar, 2007). Because of the mine closures, De Beersâs 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...had acquired a 32.8% interest in Angolaâs Catoca mine in the early 1990s. Commissioned in 1997, Catoca...mining giant Rio Tinto opened Canadaâs second diamond mine, Diavik, with 60% ownership. Rio Tinto had established |  | | Journal (issue) | | 386 Gem Notes Large kunzite from Brazil| Marble-hosted ruby mine, Mogok, Myanmar|Secondary gem deposit...from Idaho|Dumortierite inclusions in quartz from Brazil|Quartz sphere with large inclusion|Zawadi sapphires|Tourmaline...emerald parcel with imitations consisting of coated beryl and Whatâs New glass, a strongly colourzoned (green...it includes reports on composites of pale green beryl and green glass, hydrothermal synthetic emeralds...Kunzite Gem Crystal from Brazil The granitic pegmatites of Minas Gerais, Brazil, are well known for producing |  | | Book (edition) | | Salinas, Peru, H Variscite, xx 5 mm, Iturnbiara, Brazil, H Rhodocbrosite, polished, 50 mm, Capillitas,... China, H Page 1: MuscO\ite. 45 mm, Linopolis, Brazil, H Page 2: Vivianite, I 00 mm, Huanzala, Bolivia...Brazilianite, 35 mm, Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed...Rice, Dolores co., both Colorado, at the Questa mine, Taos co., New 1994. Abernathyite K2[(UOJ 2l(AsO_J2]â˘6HzO...Harding Co .. South Dakota. and at the Fuemrole No2 mine, Emery co .. Utah. Also at Menzenschwand Scbwarzwald |  | | Journal (issue) | | sunstone from India ⢠Staurolite in kyanite from Brazil ⢠Obsidian with spessartine inclusions ⢠Fluorite...were occasional finds over the centuries in India, Brazil (Cassedanne, 1989), and perhaps elsewhere, the...been cut from a large crystal found at the Finsch mine in South Africa. Figure 2. The Tiffany yellow diamond...of rough recovered from a claim on the Kimberley mine was later fashioned into the Tiffany diamond (again...(again, see figure 2). In 1964, the Dutoitspan mine yielded a spectacular 253.70 ct transparent yellow |  | | Report (issue) | | grade 0.266% Be). In New Mexico, past production of beryl has been from pegmatites in Taos, Rio Arriba, Mora...Miguel, and Grant Counties, with the majority of the beryl production from the Harding pegmatite, Taos County...porphyry Mo and W-Mo-Be skarn deposits northwest of Mine Hill and south of Middle Hills. At a cut-off grade............................... 19 Placer (mostly beryl and babefphite) ................................................................ 8 TABLE 2. World mine production of beryllium, in metric tons (Jaskula |  | | Journal (issue) | | Almandinespessartine from Tanzania ⢠âRed andesineâ ⢠Orange beryl from India ⢠Clinochlore from Turkey ⢠Yellow danburite...occasionally recovered by hobbyist collectors from the mine dumps. D uring the late 19th and early 20th centuries...a Byrud emerald in an antique jewelry piece. The mine is located on the shore of Lake Mjøsa, near Minnesund...Northwest Territories, Canada; Salininha in Bahia, Brazil; Ma- 108 EMERALDS FROM BYRUD, NORWAY lipo in...vanadium content is somewhat low. The mechanisms of beryl coloration by Cr and V are very similar (Burns, |  | | Journal (issue) | | 4. 9-16 h. Beurs (M-F). MADRID. ETS Ingenieros Minas, c/ Rios Rosas 23. 10-14 h. Beurs (M-F-schelpen)...nolanite-type structure from the Garpenberg Norra mine 1685-1690 Oswaldpeetersite, a new basic uranyl carbonate...carbonate mineral from the Jomac uranium mine, San Juan County, Utah, USA [R. Vochten, M. Deliens, O...Dickthomssenite, a new mineral species from the Firefly-Pigmay mine, Utah * GEOLOGICA BELGICA 3(3-4), 12.00 153-171...de Panasqueira, Beira Baixa (Portugal) 38-60 La mine de Fontsante (Var) * STEIN 28(4), 12.01 6-7 Raadeitt |  | | Journal (issue) | | associated with olivine in marble matrix was seen at a mine in the Luc Yen district. Photo by Vincent Pardieu/GIA...apatite and pargasite, and some sodium, lithium, and beryl- ABSORPTION COEFFICIENT (cm â1) 0.0 SKYBLU2 2...department. He researches and documents the entire mine-to-market gem and Armil Sammoon Andrew Lucas jewelry...Group in Casablanca obtained exclusive rights to the mine (an open quarry, in accordance with Moroccan law)...arid and forbidding environment (figure 3). The mine is located 6 km east of the Tagragra Tata Precambrian |  | | Journal (issue) | | North Carolina ⢠Emerald-in-matrix from Bahia, Brazil ⢠5th century garnet jewelry from Romania ⢠Natural...reports on copperbearing tourmalines from ParaĂba, Brazil; rubies and sapphires from Vietnam; and rubies...Consisting of synthetic alexandrite, amethyst, beryl, corundum, diamond, and fire opal, this collection...hydrothermal synthetic emeralds: that is, use of a natural beryl seed plate in an autoclave. The producer indicated...16). Although hydrothermally grown synthetic red beryl was produced in earlier decades, the detailed descriptions |  | | Journal (issue) | | emeralds were purchased or collected directly from the mine areas. The authors acquired the other samples at...Sandawana, Zimbabwe ItabiraNova Era, Brazil Santa Terezinha, Brazil Swat, Pakistan Panjshir, Afghanistan...famous localities in South America (Colombia and Brazil), Asia (Russia, Pakistan, and Afghanistan), and...(Kafubu, Zambia; Sandawana, Zimbabwe; and ItabiraâNova Era, Brazil) Group 2âCrystallization without the involvement...phlogopite schistâ related emerald (Santa Terezinha, Brazil) ⢠Category D: Talc-carbonate schistârelated emerald |
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Piteiras Mine, Itabira, Minas Gerais, Brazil