 | 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...closely with alkaline metasomatized pegmatite bodies, quartz boudin and veins, and talc-chlorite bands. Four...006 0.008) and speciďŹc gravity (2.65 2.78), the Piteiras emeralds fall within the expected range for metasomatic |  | 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) | | 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...ct. Insufu rough emerald extracted from the Kagem mine in 2015. Lastly, on the 2th of October, the remarkable...(âthe lion elephantâ) was extracted from the same mine [3]. Other giant crystals have been discovered in...emerald crystals was discovered in the CarnaĂba mine, Brazil; the specimen weighed 341 kg with 1.7 million |  | | 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 |  | | 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 |  | | Report (issue) | | and trapiche emerald Rupert Hochleitner Brazil: Minas Gerais, Bahia, Ceara, Goias and Tocantins . . ...Asia: Pakistan, Afghanistan and India .......6 0 Old Mine Emeralds . . . . . . . . . . . . . . . . . . . ...Maharajahs and Maharanis held large emeralds (see "Old Mine Emeralds" page 62). The Color of Islam Emerald...quality. It was the gift of Emperor Dom Pedro I of Brazil to the 6 th Duke of Devon- shire. Also housed...fantasy: even colorless crystal fragments such as quartz combined with green glue and disguised with a bit |  | | 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 (article/letter/editorial) | | geochronology of the Lagoa Real uranium district, Brazil: Implications for the age of the uranium mineralizationâLydia...geochemistry of the Charlotte quartz vein stockwork, Mt Charlotte gold mine, Kalgoorlie, Australia: Time...MAGAZINE Vol. 78, No. 7, 2014 The Piteiras emerald mine, Minas Gerais, Brazil: Fluid-inclusion and gemmological...gold lineament, QuadrilĂĄtero FerrĂfero, Minas Gerais, Brazilâ Yuri Ribeiro, Rosaline C. Figueiredo e...deposit, NE of the QuadrilĂĄtero FerrĂfero Region, BrazilâColombo C.G. Tassinari, Antonio M. Mateus, Marta |  | | 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,...blood ruby, royal blue and cornflower sapphire, old mine/ Muzo green emerald, sunrise and sunset padparadscha...(Figure 4b), spessartine (Figure 4c), almandine, quartz, zircon, apatite, topaz, sillimanite, fluorite...tourmaline (Figure 4d), aquamarine, spessartine, quartz, topaz, zircon and phenakite are mined. Tourmaline |  | | Journal (issue) | | the development of Australiaâs first major diamond mine, the worldâs largest source of diamonds by volume...Benitoite mine sold ⢠Emeralds from Laghman, Afghanistan ⢠Emeralds from Piteiras, Brazil ⢠Educational...backing and covered with a synthetic spinel or quartz cap. Since 1980, both solid Ammolite and assembled...âclose-upâ map shows the location of the three main mine sites discussed in this article: Kormos, Oxbow,...1983, when mining started at the open-pit Kormos mine, high-quality material has been offered regularly |  | | Journal (issue) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...perpendicular to the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase...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...drill holes ⢠Glass sold as quartz ⢠Fossil ivory ⢠Hornbill âivoryâ ⢠Quartz with rhodochrosite ⢠Sapphires...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 |  | | Book | | of the Stone in Myth and in Rock 9 3 From Mine to âMineâ: The Emerald Business 21 4 Emeralds in World...mineral aggregates, including large crystals of quartz, feldspar, mica, and beryl. Because pegmatite is...could identify the country and sometimes the actual mine a particular stone came from. However, vaporizing...Greisen is a granitic (granite-like) rock formed from quartz and mica, while schist is a flaky stone characterized...these emeralds are typically found in calcite or quartz veins, not in schist. You may be familiar with |  | | Journal (article/letter/editorial) | | emerald mines in Colombia are becoming depleted. Brazil currently accounts for approximately 10% of world...samples from the Lened occurrence in Canada, the Muzo mine in Colombia, the Mohmand district in Pakistan, and...export values of emerald rough (Zwaan et al., 2005). Brazil currently accounts for approximately 10% of world...to 0.02% were of gem-quality. 89 Since then the mine has been re-opened and closed several times (Walton...emeralds are in pegmatite dikes with ďŹuorite, beryl, quartz, topaz, arsenopyrite, and cassiterite. The crystals |  | | 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) | | Lab Notes ⢠Bromellite ⢠Charoite inclusions in a quartz-feldspar rock ⢠Altered vs. natural inclusions...News International ⢠Australiaâs Ellendale diamond mine opens ⢠Aquamarine and spessartine from Tanzania...⢠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 |  | | Book | | Granitic Pegmatite, Parelhas, Rio Grande do Norte, Brazil Reprinted from: Minerals 2019, 9, 233, doi:10.3390/min9040233...Xydous On the Color and Genesis of Prase (Green Quartz) and Amethyst from the Island of Serifos, Cyclades...Province (BPP) from Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite is classiďŹed...sources (i.e., Afghanistan (Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso),...[34] focus on the genesis of prase (green-coloured quartz) and amethyst from Serifos Island (Cyclades, Greece) |  | | 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...by CVD synthetic diamond, and multicoloured dyed quartz. 381 Whatâs New GGTL Newsletters Gold Demand...fractures, and recent developments in âSoudĂŠ Emeraldsâ (quartz doublets). The Journal of Gemmology, 34(5), 2015...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...very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage |  | | Journal (issue) | | crystal quartz ⢠Jadeite with high albite ⢠Moldavite study ⢠Iridescent scapolite ⢠Composite quartz beads...associated with olivine in marble matrix was seen at a mine in the Luc Yen district. Photo by Vincent Pardieu/GIA...Minh Khe Nhan Dai Thi Formation : quartz-mica-feldspath scist, quartz-biotitsericite schist, quartite An...Upper Proterozoic - Lower Cambrian : micashist, quartz-biotite or muscovite schist, gneiss, migmatite...tremolite + calcite â diopside + dolomite dolomite + quartz â diopside + carbon dioxide lium in blue spinel |  | | Journal (issue) | | kyanite from Brazil ⢠Obsidian with spessartine inclusions ⢠Fluorite inclusions in quartz from Madagascar...Madagascar ⢠Bismuthinite inclusions in rose quartz from Madagascar ⢠Yellow hydrothermal synthetic sapphires...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 |  | | Journal (issue) | | networks. 321 Introduction A steriated quartz, especially rose quartz, has been known for more than a century...of the quartz crystals. Rarely, twelve-rayed stars are also observed in quartz or rose quartz (Cassedanne...Figure 1). Occasionally, complete spheres of rose quartz show additional, mostly weak light bands that are...Sphere of very lightly coloured Brazilian rose quartz revealing twelve-rayed asterism. The diameter of...1355-^1565 Figure 2: Cabochon-cut multi-star quartz from Sri Lanka in an orientation showing only the |  | | 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) | | Blue-green plagioclase ⢠Green fluid inclusions in quartz ⢠Inclusions within inclusions ⢠Blue sapphire...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...emeralds from this locality. It is accompanied by quartz, feldspar, spheres of muscovite, and grayish fluorite |  | | Journal (issue) | | SUMMER 2006 LETTERS LETTERS MORE ABOUT âMEDUSA QUARTZâ Shortly after the publication of the Gem News...News International entry on gilalite-bearing quartz (Fall 2005, pp. 271â272), I received a reprint request...felt that the name chosen for this new variety of quartz was quite appropriate. He was also kind enough...photomicrograph of a gilalite cluster in âmedusa quartz,â the resemblance is striking (figure 1). This...striking resemblance to the gilalite inclusion in quartz on the right. Photos by Francesc Pagès and B. Rondeau |
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